不曾见过的Python函数——any()，all()

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

返回 True ，如果这个 可迭代对象中的存在一个元素都是 True

如果这个可迭代对象为空，返回 False

all(iterable)

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

测试如下：

In [45]: any(i>0 for i in range(10))
Out[45]: True

In [46]: any(i>5 for i in range(10))
Out[46]: True

In [47]: all(i>5 for i in range(10))
Out[47]: False