importredefremove_non_alphabetic(string):returnre.sub("[^a-zA-Z]+","",string)defkeep_spaces(string):returnstring.replace(" "," ")defmain():# 输入字符串string=input("请输入字符串:")# 去除非字母元素alphanumeric_string=remove_non_alphabetic(string)# 保留空格final_string=keep_spaces(alphanu...
range of Unicode whitespace characters. \S Matches any non-whitespace character; equivalent to [^\s]. \w Matches any alphanumeric character; equivalent to [a-zA-Z0-9_] in bytes patterns or string patterns with the ASCII flag. In string patterns without the ASCII flag, it will match the ...
escape( string ) 这是个功能比较古怪的函数,它的作用是将字符串中的 non-alphanumerics 字符(我已不知道该怎么翻译比较好了)用反义字符的形式显示出来。有时候你可能希望在正则式中匹配一个字符串,不过里面含有很多 re 使用的符号,你要一个一个的修改写法实在有点麻烦,你可以使用这个函数 , 例 在目标字符串 ...
escape( string ) 这是个功能比较古怪的函数,它的作用是将字符串中的non-alphanumerics字符(我已不知道该怎么翻译比较好了)用反义字符的形式显示出来。有时候你可能希望在正则式中匹配一个字符串,不过里面含有很多re使用的符号,你要一个一个的修改写法实在有点麻烦,你可以使用这个函数, 例 在目标字符串s中匹配...
escapeEscape all non-alphanumeric characters in pattern. findallReturn a list of all non-overlapping matches in the string. If one or more groups are present in the pattern, return a list of groups; this will be a list of tuples if the pattern has more than one group. Empty matches ar...
S.replace(old, new[, count]) -> str Return a copy of S with all occurrences of substring old replaced by new. If the optional argument count is given, only the first count occurrences are replaced. """ return "" 用法:返回字符串的副本,其中old的匹配项都被替换为new,可选择最多替换count...
| S.isalnum() -> bool | | Return True if all characters in S are alphanumeric | and there is at least one character in S, False otherwise. | | isalpha(...) | S.isalpha() -> bool | | Return True if all characters in S are alphabetic | and there is at least one character ...
re.sub( r"\\\w+\s*", # a backslash followed by alphanumerics; '', # replace it with an empty string; input_string # in your input string ) >>> re.sub(r"\\\w+\s*", "", r"\fs24 hello there") 'hello there' >>> re.sub(r"\\\w+\s*", "", "hello there") 'hello...
| B.isalnum() -> bool | | Return True if all characters in B are alphanumeric | and there is at least one character in B, False otherwise. | | isalpha(...) | B.isalpha() -> bool | | Return True if all characters in B are alphabetic | and there is at least one character ...
41. Remove Non-Alphanumerics Write a Python program to remove everything except alphanumeric characters from a string. Click me to see the solution 42. Find URLs Write a Python program to find URLs in a string. Click me to see the solution ...