| 1 | n/a | ################################################################################ |
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| 2 | n/a | ### Simple tests |
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| 3 | n/a | ################################################################################ |
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| 4 | n/a | |
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| 5 | n/a | # verify that instances can be pickled |
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| 6 | n/a | from collections import namedtuple |
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| 7 | n/a | from pickle import loads, dumps |
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| 8 | n/a | Point = namedtuple('Point', 'x, y', True) |
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| 9 | n/a | p = Point(x=10, y=20) |
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| 10 | n/a | assert p == loads(dumps(p)) |
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| 11 | n/a | |
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| 12 | n/a | # test and demonstrate ability to override methods |
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| 13 | n/a | class Point(namedtuple('Point', 'x y')): |
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| 14 | n/a | __slots__ = () |
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| 15 | n/a | @property |
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| 16 | n/a | def hypot(self): |
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| 17 | n/a | return (self.x ** 2 + self.y ** 2) ** 0.5 |
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| 18 | n/a | def __str__(self): |
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| 19 | n/a | return 'Point: x=%6.3f y=%6.3f hypot=%6.3f' % (self.x, self.y, self.hypot) |
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| 20 | n/a | |
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| 21 | n/a | for p in Point(3, 4), Point(14, 5/7.): |
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| 22 | n/a | print (p) |
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| 23 | n/a | |
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| 24 | n/a | class Point(namedtuple('Point', 'x y')): |
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| 25 | n/a | 'Point class with optimized _make() and _replace() without error-checking' |
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| 26 | n/a | __slots__ = () |
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| 27 | n/a | _make = classmethod(tuple.__new__) |
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| 28 | n/a | def _replace(self, _map=map, **kwds): |
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| 29 | n/a | return self._make(_map(kwds.get, ('x', 'y'), self)) |
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| 30 | n/a | |
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| 31 | n/a | print(Point(11, 22)._replace(x=100)) |
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| 32 | n/a | |
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| 33 | n/a | Point3D = namedtuple('Point3D', Point._fields + ('z',)) |
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| 34 | n/a | print(Point3D.__doc__) |
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| 35 | n/a | |
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| 36 | n/a | import doctest, collections |
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| 37 | n/a | TestResults = namedtuple('TestResults', 'failed attempted') |
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| 38 | n/a | print(TestResults(*doctest.testmod(collections))) |
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