
内置函数值 -- chr() ord() -- 字符和ascii的转换
发布日期:2021-05-08 23:41:53
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分类:原创文章
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英文文档:
-
chr
(i) - Return the string representing a character whose Unicode code point is the integer i. For example,
chr(97)
returns the string'a'
, whilechr(8364)
returns the string'€'
. This is the inverse of . - The valid range for the argument is from 0 through 1,114,111 (0x10FFFF in base 16). will be raised if i is outside that range
- 说明:
- 1. 函数返回整形参数值所对应的Unicode字符的字符串表示
>>> chr(97) #参数类型为整数'a'>>> chr('97') #参数传入字符串时报错Traceback (most recent call last): File "<pyshell#6>", line 1, in <module> chr('97')TypeError: an integer is required (got type str)>>> type(chr(97)) #返回类型为字符串<class 'str'>
2. 它的功能与ord函数刚好相反
>>> chr(97)'a'>>> ord('a')97
3. 传入的参数值范围必须在0-1114111(十六进制为0x10FFFF)之间,否则将报
>>> chr(-1) #小于0报错Traceback (most recent call last): File "<pyshell#10>", line 1, in <module> chr(-1)ValueError: chr() arg not in range(0x110000)>>> chr(1114111)'\U0010ffff'>>> chr(1114112) #超过1114111报错Traceback (most recent call last): File "<pyshell#13>", line 1, in <module> chr(1114112)ValueError: chr() arg not in range(0x110000)
简单描述
chr接收一个数字, 找到这个数字对应的ascii里的元素(只能接受数字)
a = chr(65)
print(a) #结果: A
ord()接收一个字符,返回这个字符对应的数字.(只能接受一个字符)
b = ord('a')
print(b) #结果: 97