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在Python中用replace()函数操作指定字符
常用字符unicode的编码范围:
数字:\u0030-\u0039
汉字:\u4e00-\u9fa5
大写字母:\u0041-\u005a
小写字母:\u0061-\u007a
英文字母:\u0041-\u007a
1、将字符串中的指定符号替换成指定符号
#将old字符串中的2替换为9 old = "bcsbviuwvb123221iuw" new = old .replace('2', '9')
2、字符串删掉空格
str.strip(): 删除开头和结尾的空格
str.lstrip(): 删除开头(左侧)的空格
str.rstrip(): 删除结尾(右侧)的空格
str.replace(’ ', ‘’):删除字符串中的所有空格
3、字符串删掉除汉字以外的所有字符
import re old= "djsnfiosnhi1u2874834" new = re.sub('([^\u4e00-\u9fa5])', '',
old) print(new)
4、字符串删掉除汉字和数字以外的其他字符
import re old= "djsnfiosnhi1u2874834" new = re.sub(
'([^\u4e00-\u9fa5\u0030-\u0039])', '', old) print(new)```