Python anonymous function lambda

From , 5 Years ago, written in Python, viewed 73 times.

URL https://pastebin.vip/view/2dfe1946

#lambda
#普通的函数
def add(x,y):
  return x+y
print add(1,2)
#lambda函数
func = lambda x,y:x+y
print func(1,2)
#default argument in lambda
#lambda函数中的默认函数
func = lambda x,y=2:x+y
print func(1)
#why do we need lambda
#lambda函数存在的意义
#a list of functions
#一个函数列表
L = [(lambda x: x**2), (lambda x: x**3),  (lambda x: x**4)]
#function dictionary
#函数字典
key = 'got'
print {'already': (lambda: 2 + 2),
'got': (lambda: 2 * 4),
'one': (lambda: 2 ** 6)
}[key]()
#//python/4447

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Python anonymous function lambda

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