Python的内置函数---ascii,abs,any

1.ascii(object)

As repr(), return a string containing a printable representation of an object, but escape the non-ASCII characters in the string returned by repr() using \x, \u or \U escapes. This generates a string similar to that returned by repr() in Python 2.

返回一个可打印的对象字符串方式表示，如果是非ascii字符就会输出\x，\u或\U等字符来表示。与python2版本里的repr()是等效的函数。

a = ascii([1,2,"问"])
print(type(a),[a])
#<class 'str'> ["[1, 2, '\\u95ee']"]

2.abs(x)

Return the absolute value of a number. The argument may be an integer or a floating point number. If the argument is a complex number, its magnitude is returned.

返回x的绝对值，x可以是整数或者浮点数。如果x是复数，则返回x这个复数所表示的向量的长度。

print(abs(-1),abs(-2.0),abs(complex(-1,1)))
1 2.0 1.4142135623730951

3.Any(iterable)

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