Any和All是用于连续和/或的python中提供的两个内置命令。
Any
如果任何项为True,则返回true。如果为空或全部为假,则返回False。任何可以被认为是对所提供的迭代的OR运算序列。
它会使执行短路,即在结果已知时立即停止执行。
语法:any(iterables列表)
# Since all are false, false is returned
print (any([False, False, False, False]))
# Here the method will short-circuit at the
# second item (True) and will return True.
print (any([False, True, False, False]))
# Here the method will short-circuit at the
# first (True) and will return True.
print (any([True, False, False, False]))
输出:
False
True
True
All
如果所有项都为True(或者iterable为空),则返回true。所有这些都可以被认为是对所提供的迭代的一系列AND运算。它还会使执行短路,即一旦结果已知就停止执行。
语法:all(iterables列表)
# Here all the iterables are True so all
# will return True and the same will be printed
print
(all([True, True, True, True]))
# Here the method will short-circuit at the
# first item (False) and will return False.
print
(all([False, True, True, False]))
# This statement will return False, as no
# True is found in the iterables
print
(all([False, False, False]))
输出 :
True
False
False








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