chr &ord

def chr(*args, **kwargs):
    """ Return a Unicode string of one character with ordinal i; 0 <= i <= 0x10ffff. """

def ord(*args, **kwargs):
    """ Return the Unicode code point for a one-character string. """

chr(i)

返回十进制整数i对应的ASCII字符。与ord()作用相反。

参数i：取值范围[0, 255]之间的正数。

print(chr(97))   # 结果 a
print(ord(‘a‘))  # 结果 97