diff options
Diffstat (limited to 'Lib/collections.py')
| -rw-r--r-- | Lib/collections.py | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Lib/collections.py b/Lib/collections.py index e1e9d11a6c..78f92ceb54 100644 --- a/Lib/collections.py +++ b/Lib/collections.py @@ -117,23 +117,28 @@ if __name__ == '__main__': # test and demonstrate ability to override methods class Point(namedtuple('Point', 'x y')): + __slots__ = () @property def hypot(self): return (self.x ** 2 + self.y ** 2) ** 0.5 def __str__(self): - return 'Point: x=%6.3f y=%6.3f hypot=%6.3f' % (self.x, self.y, self.hypot) + return 'Point: x=%6.3f y=%6.3f hypot=%6.3f' % (self.x, self.y, self.hypot) - for p in Point(3,4), Point(14,5), Point(9./7,6): + for p in Point(3, 4), Point(14, 5/7.): print (p) class Point(namedtuple('Point', 'x y')): 'Point class with optimized _make() and _replace() without error-checking' + __slots__ = () _make = classmethod(tuple.__new__) def _replace(self, _map=map, **kwds): return self._make(_map(kwds.get, ('x', 'y'), self)) print(Point(11, 22)._replace(x=100)) + Point3D = namedtuple('Point3D', Point._fields + ('z',)) + print(Point3D.__doc__) + import doctest TestResults = namedtuple('TestResults', 'failed attempted') print(TestResults(*doctest.testmod())) |