python的all()与any()

最新推荐文章于 2025-07-02 14:21:40 发布

Gordennizaicunzai

最新推荐文章于 2025-07-02 14:21:40 发布

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分类专栏： Python 文章标签： all() any()

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本文介绍了Python中内建的all()和any()函数，这两个函数用于检查可迭代对象中的所有元素是否满足特定条件。all()函数在所有元素布尔值为True时返回True，而any()函数只需找到一个True元素就返回True。当可迭代对象为空时，all()返回True，any()返回False。

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all()和any()是python的内建函数。

help(all)
Help on built-in function all in module builtins:

all(iterable, /)
Return True if bool(x) is True for all values x in the iterable.如果所有的值都为True，则返回True。

If the iterable is empty, return True.注意，如果对象为空，也返回True。

help(any)
Help on built-in function any in module builtins:

any(iterable, /)
Return True if bool(x) is True for any x in the iterable.只要有一个值为True，则返回True。

If the iterable is empty, return False.注意，如果对象为空，则返回False。

>>> lst3 = []
>>> if all(lst3):
	print(1)

	
1
>>> if lst3:
	print(1)

	
>>> if any(lst3):
	print(1)

	
>>>

>>> a = -1
>>> b = -2
>>> c = 1
>>> d = 2
>>> e = ' '
>>> f = 'haha'
>>> g = False
>>> h = None
>>> i = 0
>>> j = ''
>>> lst1 = [a,b,c,d,e,f,g,h,i,j]
>>> lst2 = [a,b,c,d,e,f]
>>> lst1
[-1, -2, 1, 2, ' ', 'haha', False, None, 0, '']
>>> lst2
[-1, -2, 1, 2, ' ', 'haha']
>>> if not all(lst1):
	print('Some of the elements in lst1 are not True')
else:
	print('All the elements in lst1 are True')

	
Some of the elements in lst1 are not True
>>> if not all(lst2):
	print('Some of the elements in lst2 are not True')
else:
	print('All the elements in lst2 are True')

	
All the elements in lst2 are True
>>> 
>>> 
>>> if all(lst1):
	print('All the elements in lst1 are True')
else:
	print('Not all the elements in lst1 are True')

	
Not all the elements in lst1 are True
>>> if all(lst2):
	print('All the elements in lst2 are True')
else:
	print('Not all the elements in lst2 are True')

	
All the elements in lst2 are True
>>>