| 1 | n/a | # Author: Fred L. Drake, Jr. |
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| 2 | n/a | # fdrake@acm.org |
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| 3 | n/a | # |
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| 4 | n/a | # This is a simple little module I wrote to make life easier. I didn't |
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| 5 | n/a | # see anything quite like it in the library, though I may have overlooked |
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| 6 | n/a | # something. I wrote this when I was trying to read some heavily nested |
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| 7 | n/a | # tuples with fairly non-descriptive content. This is modeled very much |
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| 8 | n/a | # after Lisp/Scheme - style pretty-printing of lists. If you find it |
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| 9 | n/a | # useful, thank small children who sleep at night. |
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| 10 | n/a | |
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| 11 | n/a | """Support to pretty-print lists, tuples, & dictionaries recursively. |
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| 12 | n/a | |
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| 13 | n/a | Very simple, but useful, especially in debugging data structures. |
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| 14 | n/a | |
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| 15 | n/a | Classes |
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| 16 | n/a | ------- |
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| 17 | n/a | |
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| 18 | n/a | PrettyPrinter() |
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| 19 | n/a | Handle pretty-printing operations onto a stream using a configured |
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| 20 | n/a | set of formatting parameters. |
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| 21 | n/a | |
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| 22 | n/a | Functions |
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| 23 | n/a | --------- |
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| 24 | n/a | |
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| 25 | n/a | pformat() |
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| 26 | n/a | Format a Python object into a pretty-printed representation. |
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| 27 | n/a | |
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| 28 | n/a | pprint() |
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| 29 | n/a | Pretty-print a Python object to a stream [default is sys.stdout]. |
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| 30 | n/a | |
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| 31 | n/a | saferepr() |
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| 32 | n/a | Generate a 'standard' repr()-like value, but protect against recursive |
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| 33 | n/a | data structures. |
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| 34 | n/a | |
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| 35 | n/a | """ |
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| 36 | n/a | |
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| 37 | n/a | import collections as _collections |
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| 38 | n/a | import re |
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| 39 | n/a | import sys as _sys |
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| 40 | n/a | import types as _types |
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| 41 | n/a | from io import StringIO as _StringIO |
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| 42 | n/a | |
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| 43 | n/a | __all__ = ["pprint","pformat","isreadable","isrecursive","saferepr", |
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| 44 | n/a | "PrettyPrinter"] |
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| 45 | n/a | |
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| 46 | n/a | |
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| 47 | n/a | def pprint(object, stream=None, indent=1, width=80, depth=None, *, |
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| 48 | n/a | compact=False): |
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| 49 | n/a | """Pretty-print a Python object to a stream [default is sys.stdout].""" |
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| 50 | n/a | printer = PrettyPrinter( |
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| 51 | n/a | stream=stream, indent=indent, width=width, depth=depth, |
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| 52 | n/a | compact=compact) |
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| 53 | n/a | printer.pprint(object) |
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| 54 | n/a | |
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| 55 | n/a | def pformat(object, indent=1, width=80, depth=None, *, compact=False): |
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| 56 | n/a | """Format a Python object into a pretty-printed representation.""" |
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| 57 | n/a | return PrettyPrinter(indent=indent, width=width, depth=depth, |
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| 58 | n/a | compact=compact).pformat(object) |
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| 59 | n/a | |
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| 60 | n/a | def saferepr(object): |
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| 61 | n/a | """Version of repr() which can handle recursive data structures.""" |
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| 62 | n/a | return _safe_repr(object, {}, None, 0)[0] |
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| 63 | n/a | |
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| 64 | n/a | def isreadable(object): |
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| 65 | n/a | """Determine if saferepr(object) is readable by eval().""" |
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| 66 | n/a | return _safe_repr(object, {}, None, 0)[1] |
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| 67 | n/a | |
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| 68 | n/a | def isrecursive(object): |
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| 69 | n/a | """Determine if object requires a recursive representation.""" |
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| 70 | n/a | return _safe_repr(object, {}, None, 0)[2] |
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| 71 | n/a | |
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| 72 | n/a | class _safe_key: |
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| 73 | n/a | """Helper function for key functions when sorting unorderable objects. |
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| 74 | n/a | |
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| 75 | n/a | The wrapped-object will fallback to a Py2.x style comparison for |
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| 76 | n/a | unorderable types (sorting first comparing the type name and then by |
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| 77 | n/a | the obj ids). Does not work recursively, so dict.items() must have |
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| 78 | n/a | _safe_key applied to both the key and the value. |
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| 79 | n/a | |
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| 80 | n/a | """ |
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| 81 | n/a | |
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| 82 | n/a | __slots__ = ['obj'] |
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| 83 | n/a | |
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| 84 | n/a | def __init__(self, obj): |
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| 85 | n/a | self.obj = obj |
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| 86 | n/a | |
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| 87 | n/a | def __lt__(self, other): |
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| 88 | n/a | try: |
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| 89 | n/a | return self.obj < other.obj |
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| 90 | n/a | except TypeError: |
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| 91 | n/a | return ((str(type(self.obj)), id(self.obj)) < \ |
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| 92 | n/a | (str(type(other.obj)), id(other.obj))) |
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| 93 | n/a | |
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| 94 | n/a | def _safe_tuple(t): |
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| 95 | n/a | "Helper function for comparing 2-tuples" |
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| 96 | n/a | return _safe_key(t[0]), _safe_key(t[1]) |
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| 97 | n/a | |
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| 98 | n/a | class PrettyPrinter: |
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| 99 | n/a | def __init__(self, indent=1, width=80, depth=None, stream=None, *, |
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| 100 | n/a | compact=False): |
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| 101 | n/a | """Handle pretty printing operations onto a stream using a set of |
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| 102 | n/a | configured parameters. |
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| 103 | n/a | |
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| 104 | n/a | indent |
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| 105 | n/a | Number of spaces to indent for each level of nesting. |
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| 106 | n/a | |
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| 107 | n/a | width |
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| 108 | n/a | Attempted maximum number of columns in the output. |
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| 109 | n/a | |
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| 110 | n/a | depth |
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| 111 | n/a | The maximum depth to print out nested structures. |
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| 112 | n/a | |
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| 113 | n/a | stream |
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| 114 | n/a | The desired output stream. If omitted (or false), the standard |
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| 115 | n/a | output stream available at construction will be used. |
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| 116 | n/a | |
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| 117 | n/a | compact |
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| 118 | n/a | If true, several items will be combined in one line. |
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| 119 | n/a | |
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| 120 | n/a | """ |
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| 121 | n/a | indent = int(indent) |
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| 122 | n/a | width = int(width) |
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| 123 | n/a | if indent < 0: |
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| 124 | n/a | raise ValueError('indent must be >= 0') |
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| 125 | n/a | if depth is not None and depth <= 0: |
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| 126 | n/a | raise ValueError('depth must be > 0') |
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| 127 | n/a | if not width: |
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| 128 | n/a | raise ValueError('width must be != 0') |
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| 129 | n/a | self._depth = depth |
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| 130 | n/a | self._indent_per_level = indent |
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| 131 | n/a | self._width = width |
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| 132 | n/a | if stream is not None: |
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| 133 | n/a | self._stream = stream |
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| 134 | n/a | else: |
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| 135 | n/a | self._stream = _sys.stdout |
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| 136 | n/a | self._compact = bool(compact) |
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| 137 | n/a | |
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| 138 | n/a | def pprint(self, object): |
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| 139 | n/a | self._format(object, self._stream, 0, 0, {}, 0) |
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| 140 | n/a | self._stream.write("\n") |
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| 141 | n/a | |
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| 142 | n/a | def pformat(self, object): |
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| 143 | n/a | sio = _StringIO() |
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| 144 | n/a | self._format(object, sio, 0, 0, {}, 0) |
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| 145 | n/a | return sio.getvalue() |
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| 146 | n/a | |
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| 147 | n/a | def isrecursive(self, object): |
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| 148 | n/a | return self.format(object, {}, 0, 0)[2] |
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| 149 | n/a | |
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| 150 | n/a | def isreadable(self, object): |
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| 151 | n/a | s, readable, recursive = self.format(object, {}, 0, 0) |
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| 152 | n/a | return readable and not recursive |
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| 153 | n/a | |
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| 154 | n/a | def _format(self, object, stream, indent, allowance, context, level): |
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| 155 | n/a | objid = id(object) |
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| 156 | n/a | if objid in context: |
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| 157 | n/a | stream.write(_recursion(object)) |
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| 158 | n/a | self._recursive = True |
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| 159 | n/a | self._readable = False |
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| 160 | n/a | return |
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| 161 | n/a | rep = self._repr(object, context, level) |
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| 162 | n/a | max_width = self._width - indent - allowance |
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| 163 | n/a | if len(rep) > max_width: |
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| 164 | n/a | p = self._dispatch.get(type(object).__repr__, None) |
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| 165 | n/a | if p is not None: |
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| 166 | n/a | context[objid] = 1 |
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| 167 | n/a | p(self, object, stream, indent, allowance, context, level + 1) |
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| 168 | n/a | del context[objid] |
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| 169 | n/a | return |
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| 170 | n/a | elif isinstance(object, dict): |
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| 171 | n/a | context[objid] = 1 |
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| 172 | n/a | self._pprint_dict(object, stream, indent, allowance, |
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| 173 | n/a | context, level + 1) |
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| 174 | n/a | del context[objid] |
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| 175 | n/a | return |
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| 176 | n/a | stream.write(rep) |
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| 177 | n/a | |
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| 178 | n/a | _dispatch = {} |
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| 179 | n/a | |
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| 180 | n/a | def _pprint_dict(self, object, stream, indent, allowance, context, level): |
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| 181 | n/a | write = stream.write |
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| 182 | n/a | write('{') |
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| 183 | n/a | if self._indent_per_level > 1: |
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| 184 | n/a | write((self._indent_per_level - 1) * ' ') |
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| 185 | n/a | length = len(object) |
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| 186 | n/a | if length: |
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| 187 | n/a | items = sorted(object.items(), key=_safe_tuple) |
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| 188 | n/a | self._format_dict_items(items, stream, indent, allowance + 1, |
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| 189 | n/a | context, level) |
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| 190 | n/a | write('}') |
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| 191 | n/a | |
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| 192 | n/a | _dispatch[dict.__repr__] = _pprint_dict |
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| 193 | n/a | |
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| 194 | n/a | def _pprint_ordered_dict(self, object, stream, indent, allowance, context, level): |
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| 195 | n/a | if not len(object): |
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| 196 | n/a | stream.write(repr(object)) |
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| 197 | n/a | return |
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| 198 | n/a | cls = object.__class__ |
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| 199 | n/a | stream.write(cls.__name__ + '(') |
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| 200 | n/a | self._format(list(object.items()), stream, |
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| 201 | n/a | indent + len(cls.__name__) + 1, allowance + 1, |
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| 202 | n/a | context, level) |
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| 203 | n/a | stream.write(')') |
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| 204 | n/a | |
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| 205 | n/a | _dispatch[_collections.OrderedDict.__repr__] = _pprint_ordered_dict |
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| 206 | n/a | |
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| 207 | n/a | def _pprint_list(self, object, stream, indent, allowance, context, level): |
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| 208 | n/a | stream.write('[') |
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| 209 | n/a | self._format_items(object, stream, indent, allowance + 1, |
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| 210 | n/a | context, level) |
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| 211 | n/a | stream.write(']') |
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| 212 | n/a | |
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| 213 | n/a | _dispatch[list.__repr__] = _pprint_list |
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| 214 | n/a | |
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| 215 | n/a | def _pprint_tuple(self, object, stream, indent, allowance, context, level): |
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| 216 | n/a | stream.write('(') |
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| 217 | n/a | endchar = ',)' if len(object) == 1 else ')' |
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| 218 | n/a | self._format_items(object, stream, indent, allowance + len(endchar), |
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| 219 | n/a | context, level) |
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| 220 | n/a | stream.write(endchar) |
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| 221 | n/a | |
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| 222 | n/a | _dispatch[tuple.__repr__] = _pprint_tuple |
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| 223 | n/a | |
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| 224 | n/a | def _pprint_set(self, object, stream, indent, allowance, context, level): |
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| 225 | n/a | if not len(object): |
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| 226 | n/a | stream.write(repr(object)) |
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| 227 | n/a | return |
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| 228 | n/a | typ = object.__class__ |
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| 229 | n/a | if typ is set: |
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| 230 | n/a | stream.write('{') |
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| 231 | n/a | endchar = '}' |
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| 232 | n/a | else: |
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| 233 | n/a | stream.write(typ.__name__ + '({') |
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| 234 | n/a | endchar = '})' |
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| 235 | n/a | indent += len(typ.__name__) + 1 |
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| 236 | n/a | object = sorted(object, key=_safe_key) |
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| 237 | n/a | self._format_items(object, stream, indent, allowance + len(endchar), |
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| 238 | n/a | context, level) |
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| 239 | n/a | stream.write(endchar) |
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| 240 | n/a | |
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| 241 | n/a | _dispatch[set.__repr__] = _pprint_set |
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| 242 | n/a | _dispatch[frozenset.__repr__] = _pprint_set |
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| 243 | n/a | |
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| 244 | n/a | def _pprint_str(self, object, stream, indent, allowance, context, level): |
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| 245 | n/a | write = stream.write |
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| 246 | n/a | if not len(object): |
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| 247 | n/a | write(repr(object)) |
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| 248 | n/a | return |
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| 249 | n/a | chunks = [] |
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| 250 | n/a | lines = object.splitlines(True) |
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| 251 | n/a | if level == 1: |
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| 252 | n/a | indent += 1 |
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| 253 | n/a | allowance += 1 |
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| 254 | n/a | max_width1 = max_width = self._width - indent |
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| 255 | n/a | for i, line in enumerate(lines): |
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| 256 | n/a | rep = repr(line) |
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| 257 | n/a | if i == len(lines) - 1: |
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| 258 | n/a | max_width1 -= allowance |
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| 259 | n/a | if len(rep) <= max_width1: |
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| 260 | n/a | chunks.append(rep) |
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| 261 | n/a | else: |
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| 262 | n/a | # A list of alternating (non-space, space) strings |
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| 263 | n/a | parts = re.findall(r'\S*\s*', line) |
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| 264 | n/a | assert parts |
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| 265 | n/a | assert not parts[-1] |
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| 266 | n/a | parts.pop() # drop empty last part |
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| 267 | n/a | max_width2 = max_width |
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| 268 | n/a | current = '' |
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| 269 | n/a | for j, part in enumerate(parts): |
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| 270 | n/a | candidate = current + part |
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| 271 | n/a | if j == len(parts) - 1 and i == len(lines) - 1: |
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| 272 | n/a | max_width2 -= allowance |
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| 273 | n/a | if len(repr(candidate)) > max_width2: |
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| 274 | n/a | if current: |
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| 275 | n/a | chunks.append(repr(current)) |
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| 276 | n/a | current = part |
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| 277 | n/a | else: |
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| 278 | n/a | current = candidate |
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| 279 | n/a | if current: |
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| 280 | n/a | chunks.append(repr(current)) |
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| 281 | n/a | if len(chunks) == 1: |
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| 282 | n/a | write(rep) |
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| 283 | n/a | return |
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| 284 | n/a | if level == 1: |
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| 285 | n/a | write('(') |
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| 286 | n/a | for i, rep in enumerate(chunks): |
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| 287 | n/a | if i > 0: |
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| 288 | n/a | write('\n' + ' '*indent) |
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| 289 | n/a | write(rep) |
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| 290 | n/a | if level == 1: |
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| 291 | n/a | write(')') |
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| 292 | n/a | |
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| 293 | n/a | _dispatch[str.__repr__] = _pprint_str |
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| 294 | n/a | |
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| 295 | n/a | def _pprint_bytes(self, object, stream, indent, allowance, context, level): |
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| 296 | n/a | write = stream.write |
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| 297 | n/a | if len(object) <= 4: |
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| 298 | n/a | write(repr(object)) |
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| 299 | n/a | return |
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| 300 | n/a | parens = level == 1 |
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| 301 | n/a | if parens: |
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| 302 | n/a | indent += 1 |
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| 303 | n/a | allowance += 1 |
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| 304 | n/a | write('(') |
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| 305 | n/a | delim = '' |
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| 306 | n/a | for rep in _wrap_bytes_repr(object, self._width - indent, allowance): |
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| 307 | n/a | write(delim) |
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| 308 | n/a | write(rep) |
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| 309 | n/a | if not delim: |
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| 310 | n/a | delim = '\n' + ' '*indent |
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| 311 | n/a | if parens: |
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| 312 | n/a | write(')') |
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| 313 | n/a | |
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| 314 | n/a | _dispatch[bytes.__repr__] = _pprint_bytes |
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| 315 | n/a | |
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| 316 | n/a | def _pprint_bytearray(self, object, stream, indent, allowance, context, level): |
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| 317 | n/a | write = stream.write |
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| 318 | n/a | write('bytearray(') |
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| 319 | n/a | self._pprint_bytes(bytes(object), stream, indent + 10, |
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| 320 | n/a | allowance + 1, context, level + 1) |
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| 321 | n/a | write(')') |
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| 322 | n/a | |
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| 323 | n/a | _dispatch[bytearray.__repr__] = _pprint_bytearray |
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| 324 | n/a | |
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| 325 | n/a | def _pprint_mappingproxy(self, object, stream, indent, allowance, context, level): |
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| 326 | n/a | stream.write('mappingproxy(') |
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| 327 | n/a | self._format(object.copy(), stream, indent + 13, allowance + 1, |
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| 328 | n/a | context, level) |
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| 329 | n/a | stream.write(')') |
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| 330 | n/a | |
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| 331 | n/a | _dispatch[_types.MappingProxyType.__repr__] = _pprint_mappingproxy |
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| 332 | n/a | |
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| 333 | n/a | def _format_dict_items(self, items, stream, indent, allowance, context, |
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| 334 | n/a | level): |
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| 335 | n/a | write = stream.write |
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| 336 | n/a | indent += self._indent_per_level |
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| 337 | n/a | delimnl = ',\n' + ' ' * indent |
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| 338 | n/a | last_index = len(items) - 1 |
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| 339 | n/a | for i, (key, ent) in enumerate(items): |
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| 340 | n/a | last = i == last_index |
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| 341 | n/a | rep = self._repr(key, context, level) |
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| 342 | n/a | write(rep) |
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| 343 | n/a | write(': ') |
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| 344 | n/a | self._format(ent, stream, indent + len(rep) + 2, |
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| 345 | n/a | allowance if last else 1, |
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| 346 | n/a | context, level) |
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| 347 | n/a | if not last: |
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| 348 | n/a | write(delimnl) |
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| 349 | n/a | |
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| 350 | n/a | def _format_items(self, items, stream, indent, allowance, context, level): |
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| 351 | n/a | write = stream.write |
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| 352 | n/a | indent += self._indent_per_level |
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| 353 | n/a | if self._indent_per_level > 1: |
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| 354 | n/a | write((self._indent_per_level - 1) * ' ') |
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| 355 | n/a | delimnl = ',\n' + ' ' * indent |
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| 356 | n/a | delim = '' |
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| 357 | n/a | width = max_width = self._width - indent + 1 |
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| 358 | n/a | it = iter(items) |
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| 359 | n/a | try: |
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| 360 | n/a | next_ent = next(it) |
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| 361 | n/a | except StopIteration: |
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| 362 | n/a | return |
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| 363 | n/a | last = False |
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| 364 | n/a | while not last: |
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| 365 | n/a | ent = next_ent |
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| 366 | n/a | try: |
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| 367 | n/a | next_ent = next(it) |
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| 368 | n/a | except StopIteration: |
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| 369 | n/a | last = True |
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| 370 | n/a | max_width -= allowance |
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| 371 | n/a | width -= allowance |
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| 372 | n/a | if self._compact: |
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| 373 | n/a | rep = self._repr(ent, context, level) |
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| 374 | n/a | w = len(rep) + 2 |
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| 375 | n/a | if width < w: |
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| 376 | n/a | width = max_width |
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| 377 | n/a | if delim: |
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| 378 | n/a | delim = delimnl |
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| 379 | n/a | if width >= w: |
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| 380 | n/a | width -= w |
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| 381 | n/a | write(delim) |
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| 382 | n/a | delim = ', ' |
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| 383 | n/a | write(rep) |
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| 384 | n/a | continue |
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| 385 | n/a | write(delim) |
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| 386 | n/a | delim = delimnl |
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| 387 | n/a | self._format(ent, stream, indent, |
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| 388 | n/a | allowance if last else 1, |
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| 389 | n/a | context, level) |
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| 390 | n/a | |
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| 391 | n/a | def _repr(self, object, context, level): |
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| 392 | n/a | repr, readable, recursive = self.format(object, context.copy(), |
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| 393 | n/a | self._depth, level) |
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| 394 | n/a | if not readable: |
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| 395 | n/a | self._readable = False |
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| 396 | n/a | if recursive: |
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| 397 | n/a | self._recursive = True |
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| 398 | n/a | return repr |
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| 399 | n/a | |
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| 400 | n/a | def format(self, object, context, maxlevels, level): |
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| 401 | n/a | """Format object for a specific context, returning a string |
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| 402 | n/a | and flags indicating whether the representation is 'readable' |
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| 403 | n/a | and whether the object represents a recursive construct. |
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| 404 | n/a | """ |
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| 405 | n/a | return _safe_repr(object, context, maxlevels, level) |
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| 406 | n/a | |
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| 407 | n/a | def _pprint_default_dict(self, object, stream, indent, allowance, context, level): |
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| 408 | n/a | if not len(object): |
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| 409 | n/a | stream.write(repr(object)) |
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| 410 | n/a | return |
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| 411 | n/a | rdf = self._repr(object.default_factory, context, level) |
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| 412 | n/a | cls = object.__class__ |
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| 413 | n/a | indent += len(cls.__name__) + 1 |
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| 414 | n/a | stream.write('%s(%s,\n%s' % (cls.__name__, rdf, ' ' * indent)) |
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| 415 | n/a | self._pprint_dict(object, stream, indent, allowance + 1, context, level) |
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| 416 | n/a | stream.write(')') |
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| 417 | n/a | |
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| 418 | n/a | _dispatch[_collections.defaultdict.__repr__] = _pprint_default_dict |
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| 419 | n/a | |
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| 420 | n/a | def _pprint_counter(self, object, stream, indent, allowance, context, level): |
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| 421 | n/a | if not len(object): |
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| 422 | n/a | stream.write(repr(object)) |
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| 423 | n/a | return |
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| 424 | n/a | cls = object.__class__ |
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| 425 | n/a | stream.write(cls.__name__ + '({') |
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| 426 | n/a | if self._indent_per_level > 1: |
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| 427 | n/a | stream.write((self._indent_per_level - 1) * ' ') |
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| 428 | n/a | items = object.most_common() |
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| 429 | n/a | self._format_dict_items(items, stream, |
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| 430 | n/a | indent + len(cls.__name__) + 1, allowance + 2, |
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| 431 | n/a | context, level) |
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| 432 | n/a | stream.write('})') |
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| 433 | n/a | |
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| 434 | n/a | _dispatch[_collections.Counter.__repr__] = _pprint_counter |
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| 435 | n/a | |
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| 436 | n/a | def _pprint_chain_map(self, object, stream, indent, allowance, context, level): |
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| 437 | n/a | if not len(object.maps): |
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| 438 | n/a | stream.write(repr(object)) |
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| 439 | n/a | return |
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| 440 | n/a | cls = object.__class__ |
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| 441 | n/a | stream.write(cls.__name__ + '(') |
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| 442 | n/a | indent += len(cls.__name__) + 1 |
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| 443 | n/a | for i, m in enumerate(object.maps): |
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| 444 | n/a | if i == len(object.maps) - 1: |
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| 445 | n/a | self._format(m, stream, indent, allowance + 1, context, level) |
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| 446 | n/a | stream.write(')') |
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| 447 | n/a | else: |
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| 448 | n/a | self._format(m, stream, indent, 1, context, level) |
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| 449 | n/a | stream.write(',\n' + ' ' * indent) |
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| 450 | n/a | |
|---|
| 451 | n/a | _dispatch[_collections.ChainMap.__repr__] = _pprint_chain_map |
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| 452 | n/a | |
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| 453 | n/a | def _pprint_deque(self, object, stream, indent, allowance, context, level): |
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| 454 | n/a | if not len(object): |
|---|
| 455 | n/a | stream.write(repr(object)) |
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| 456 | n/a | return |
|---|
| 457 | n/a | cls = object.__class__ |
|---|
| 458 | n/a | stream.write(cls.__name__ + '(') |
|---|
| 459 | n/a | indent += len(cls.__name__) + 1 |
|---|
| 460 | n/a | stream.write('[') |
|---|
| 461 | n/a | if object.maxlen is None: |
|---|
| 462 | n/a | self._format_items(object, stream, indent, allowance + 2, |
|---|
| 463 | n/a | context, level) |
|---|
| 464 | n/a | stream.write('])') |
|---|
| 465 | n/a | else: |
|---|
| 466 | n/a | self._format_items(object, stream, indent, 2, |
|---|
| 467 | n/a | context, level) |
|---|
| 468 | n/a | rml = self._repr(object.maxlen, context, level) |
|---|
| 469 | n/a | stream.write('],\n%smaxlen=%s)' % (' ' * indent, rml)) |
|---|
| 470 | n/a | |
|---|
| 471 | n/a | _dispatch[_collections.deque.__repr__] = _pprint_deque |
|---|
| 472 | n/a | |
|---|
| 473 | n/a | def _pprint_user_dict(self, object, stream, indent, allowance, context, level): |
|---|
| 474 | n/a | self._format(object.data, stream, indent, allowance, context, level - 1) |
|---|
| 475 | n/a | |
|---|
| 476 | n/a | _dispatch[_collections.UserDict.__repr__] = _pprint_user_dict |
|---|
| 477 | n/a | |
|---|
| 478 | n/a | def _pprint_user_list(self, object, stream, indent, allowance, context, level): |
|---|
| 479 | n/a | self._format(object.data, stream, indent, allowance, context, level - 1) |
|---|
| 480 | n/a | |
|---|
| 481 | n/a | _dispatch[_collections.UserList.__repr__] = _pprint_user_list |
|---|
| 482 | n/a | |
|---|
| 483 | n/a | def _pprint_user_string(self, object, stream, indent, allowance, context, level): |
|---|
| 484 | n/a | self._format(object.data, stream, indent, allowance, context, level - 1) |
|---|
| 485 | n/a | |
|---|
| 486 | n/a | _dispatch[_collections.UserString.__repr__] = _pprint_user_string |
|---|
| 487 | n/a | |
|---|
| 488 | n/a | # Return triple (repr_string, isreadable, isrecursive). |
|---|
| 489 | n/a | |
|---|
| 490 | n/a | def _safe_repr(object, context, maxlevels, level): |
|---|
| 491 | n/a | typ = type(object) |
|---|
| 492 | n/a | if typ in _builtin_scalars: |
|---|
| 493 | n/a | return repr(object), True, False |
|---|
| 494 | n/a | |
|---|
| 495 | n/a | r = getattr(typ, "__repr__", None) |
|---|
| 496 | n/a | if issubclass(typ, dict) and r is dict.__repr__: |
|---|
| 497 | n/a | if not object: |
|---|
| 498 | n/a | return "{}", True, False |
|---|
| 499 | n/a | objid = id(object) |
|---|
| 500 | n/a | if maxlevels and level >= maxlevels: |
|---|
| 501 | n/a | return "{...}", False, objid in context |
|---|
| 502 | n/a | if objid in context: |
|---|
| 503 | n/a | return _recursion(object), False, True |
|---|
| 504 | n/a | context[objid] = 1 |
|---|
| 505 | n/a | readable = True |
|---|
| 506 | n/a | recursive = False |
|---|
| 507 | n/a | components = [] |
|---|
| 508 | n/a | append = components.append |
|---|
| 509 | n/a | level += 1 |
|---|
| 510 | n/a | saferepr = _safe_repr |
|---|
| 511 | n/a | items = sorted(object.items(), key=_safe_tuple) |
|---|
| 512 | n/a | for k, v in items: |
|---|
| 513 | n/a | krepr, kreadable, krecur = saferepr(k, context, maxlevels, level) |
|---|
| 514 | n/a | vrepr, vreadable, vrecur = saferepr(v, context, maxlevels, level) |
|---|
| 515 | n/a | append("%s: %s" % (krepr, vrepr)) |
|---|
| 516 | n/a | readable = readable and kreadable and vreadable |
|---|
| 517 | n/a | if krecur or vrecur: |
|---|
| 518 | n/a | recursive = True |
|---|
| 519 | n/a | del context[objid] |
|---|
| 520 | n/a | return "{%s}" % ", ".join(components), readable, recursive |
|---|
| 521 | n/a | |
|---|
| 522 | n/a | if (issubclass(typ, list) and r is list.__repr__) or \ |
|---|
| 523 | n/a | (issubclass(typ, tuple) and r is tuple.__repr__): |
|---|
| 524 | n/a | if issubclass(typ, list): |
|---|
| 525 | n/a | if not object: |
|---|
| 526 | n/a | return "[]", True, False |
|---|
| 527 | n/a | format = "[%s]" |
|---|
| 528 | n/a | elif len(object) == 1: |
|---|
| 529 | n/a | format = "(%s,)" |
|---|
| 530 | n/a | else: |
|---|
| 531 | n/a | if not object: |
|---|
| 532 | n/a | return "()", True, False |
|---|
| 533 | n/a | format = "(%s)" |
|---|
| 534 | n/a | objid = id(object) |
|---|
| 535 | n/a | if maxlevels and level >= maxlevels: |
|---|
| 536 | n/a | return format % "...", False, objid in context |
|---|
| 537 | n/a | if objid in context: |
|---|
| 538 | n/a | return _recursion(object), False, True |
|---|
| 539 | n/a | context[objid] = 1 |
|---|
| 540 | n/a | readable = True |
|---|
| 541 | n/a | recursive = False |
|---|
| 542 | n/a | components = [] |
|---|
| 543 | n/a | append = components.append |
|---|
| 544 | n/a | level += 1 |
|---|
| 545 | n/a | for o in object: |
|---|
| 546 | n/a | orepr, oreadable, orecur = _safe_repr(o, context, maxlevels, level) |
|---|
| 547 | n/a | append(orepr) |
|---|
| 548 | n/a | if not oreadable: |
|---|
| 549 | n/a | readable = False |
|---|
| 550 | n/a | if orecur: |
|---|
| 551 | n/a | recursive = True |
|---|
| 552 | n/a | del context[objid] |
|---|
| 553 | n/a | return format % ", ".join(components), readable, recursive |
|---|
| 554 | n/a | |
|---|
| 555 | n/a | rep = repr(object) |
|---|
| 556 | n/a | return rep, (rep and not rep.startswith('<')), False |
|---|
| 557 | n/a | |
|---|
| 558 | n/a | _builtin_scalars = frozenset({str, bytes, bytearray, int, float, complex, |
|---|
| 559 | n/a | bool, type(None)}) |
|---|
| 560 | n/a | |
|---|
| 561 | n/a | def _recursion(object): |
|---|
| 562 | n/a | return ("<Recursion on %s with id=%s>" |
|---|
| 563 | n/a | % (type(object).__name__, id(object))) |
|---|
| 564 | n/a | |
|---|
| 565 | n/a | |
|---|
| 566 | n/a | def _perfcheck(object=None): |
|---|
| 567 | n/a | import time |
|---|
| 568 | n/a | if object is None: |
|---|
| 569 | n/a | object = [("string", (1, 2), [3, 4], {5: 6, 7: 8})] * 100000 |
|---|
| 570 | n/a | p = PrettyPrinter() |
|---|
| 571 | n/a | t1 = time.time() |
|---|
| 572 | n/a | _safe_repr(object, {}, None, 0) |
|---|
| 573 | n/a | t2 = time.time() |
|---|
| 574 | n/a | p.pformat(object) |
|---|
| 575 | n/a | t3 = time.time() |
|---|
| 576 | n/a | print("_safe_repr:", t2 - t1) |
|---|
| 577 | n/a | print("pformat:", t3 - t2) |
|---|
| 578 | n/a | |
|---|
| 579 | n/a | def _wrap_bytes_repr(object, width, allowance): |
|---|
| 580 | n/a | current = b'' |
|---|
| 581 | n/a | last = len(object) // 4 * 4 |
|---|
| 582 | n/a | for i in range(0, len(object), 4): |
|---|
| 583 | n/a | part = object[i: i+4] |
|---|
| 584 | n/a | candidate = current + part |
|---|
| 585 | n/a | if i == last: |
|---|
| 586 | n/a | width -= allowance |
|---|
| 587 | n/a | if len(repr(candidate)) > width: |
|---|
| 588 | n/a | if current: |
|---|
| 589 | n/a | yield repr(current) |
|---|
| 590 | n/a | current = part |
|---|
| 591 | n/a | else: |
|---|
| 592 | n/a | current = candidate |
|---|
| 593 | n/a | if current: |
|---|
| 594 | n/a | yield repr(current) |
|---|
| 595 | n/a | |
|---|
| 596 | n/a | if __name__ == "__main__": |
|---|
| 597 | n/a | _perfcheck() |
|---|
