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python通过函数属性实现全局变量的方法

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Release: 2016-06-06 11:16:02
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本文实例讲述了python通过函数属性实现全局变量的方法。分享给大家供大家参考。具体分析如下:

python的函数可以定义属性,而且是全局的,这个非常好用,例如用于数字累加,你不用专门去定义一个全局变量,使用函数的属性即可。

def add(x=1):
  try:
    add.sum += x
  except AttributeError:
    add.sum = x
  return add.sum
print add(3)
print add(4)
print add(10)
class Ax(object):
  def __init__(self, val=0):
    self.sum = val
     
  def __call__(self, x=1):
    self.sum += x
    return self.sum
add = Ax()    
print add(3)
print add(4)
print add(10)
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希望本文所述对大家的Python程序设计有所帮助。

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