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update the example in the Properties of python

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2020-10-20 16:26:48 +08:00
parent bc0395c048
commit 691a13dbe1
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69
google-python-styleguide/python_language_rules.rst
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@@ -385,50 +385,47 @@ Lambda函数
.. code-block:: python
Yes: import math
Yes: import math
class Square(object):
"""A square with two properties: a writable area and a read-only perimeter.
class Square:
"""A square with two properties: a writable area and a read-only perimeter.
To use:
>>> sq = Square(3)
>>> sq.area
9
>>> sq.perimeter
12
>>> sq.area = 16
>>> sq.side
4
>>> sq.perimeter
16
"""
To use:
>>> sq = Square(3)
>>> sq.area
9
>>> sq.perimeter
12
>>> sq.area = 16
>>> sq.side
4
>>> sq.perimeter
16
"""
def __init__(self, side):
self.side = side
def __init__(self, side):
self.side = side
def __get_area(self):
"""Calculates the 'area' property."""
return self.side ** 2
@property
def area(self):
"""Area of the square."""
return self._get_area()
def ___get_area(self):
"""Indirect accessor for 'area' property."""
return self.__get_area()
@area.setter
def area(self, area):
return self._set_area(area)
def __set_area(self, area):
"""Sets the 'area' property."""
self.side = math.sqrt(area)
def _get_area(self):
"""Indirect accessor to calculate the 'area' property."""
return self.side ** 2
def ___set_area(self, area):
"""Indirect setter for 'area' property."""
self._SetArea(area)
def _set_area(self, area):
"""Indirect setter to set the 'area' property."""
self.side = math.sqrt(area)
area = property(___get_area, ___set_area,
doc="""Gets or sets the area of the square.""")
@property
def perimeter(self):
return self.side * 4
@property
def perimeter(self):
return self.side * 4
(译者注: 老实说, 我觉得这段示例代码很不恰当, 有必要这么蛋疼吗?)