python any all权威解释

all(iterable)
如果所有可迭代元素为true则返回true。如果可迭代元素为空，亦返回true。等价于
Return True if all elements of the iterable are true (or if the iterable is empty). Equivalent to:

def all(iterable):
    for element in iterable:
        if not element:
            return False
    return True

any(iterable)
如果任一可迭代元素为true则返回true。如果可迭代元素为空，返回false。等价于
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