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Detailed introduction to Python’s built-in any function

高洛峰Original: 2017-03-21 11:38:541536browse

English documentation:

any(iterable)

Return True if any element of the iterable is true. If the iterable is empty, return False. Equivalent to:

def any(iterable):
    for element in iterable:
        if element:
            return True
    return False

Description:

1. Accept an iterable object as a parameter. When the parameter is empty or not an iterable object, an error is reported.

>>> any(2) #传入数值报错
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    any(2)
TypeError: &#39;int&#39; object is not iterable

2. If the logical value of one element in the iterable object is True, return True, and if all values are False, return False

>>> any([0,1,2]) #列表元素有一个为True，则返回True
True
>>> any([0,0]) #列表元素全部为False，则返回False
False

3. If the iterable object is empty (The number of elements is 0), return False

>>> any([]) #空列表
False
>>> any({}) #空字典
False
>>>

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