我很难找到合适的正则表达式模式,它将匹配以下各项的每个变体:regular-expression regular方法来匹配上面列出的每个事件:
str="This is a string to search for a regular expression like regular expression or regular-expression
search_string = '''This is a string to search for a regular expression like regular expression or # c. regular:expressionex1 = re.search('regular expression', search_st