Question

我有一个字符串如下：

course_name = "Post Graduate Certificate Programme in Retail Management (PGCPRM) (Online)"

我想只提取'PGCPRM'或第一个括号内的值，并且有一个新的课程名称，如下所示：

course_name_new = "Post Graduate Certificate Programme in Retail Management (Online)"

Answer 1

您可以使用str.replace()：

>>> course_name = "Post Graduate Certificate Programme in Retail Management (PGCPRM) (Online)"
>>> course_name.replace('(PGCPRM) ','')
'Post Graduate Certificate Programme in Retail Management (Online)'

编辑：如果您想在(Online)之前替换单词，则需要正则表达式和positive look-behind：

>>> re.sub(r'(\(\w+\) )(?=\(Online\))','',course_name)
'Post Graduate Certificate Programme in Retail Management (Online)'

或者如果要删除第一个括号，请使用以下命令：

>>> re.sub(r'(\(\w+\) ).*?','',course_name)
'Post Graduate Certificate Programme in Retail Management (Online)'

对于提取，使用re.search：

>>> re.search(r'(\(.*?\))',course_name).group(0)
'(PGCPRM)'

Answer 2

非常简单：

In [8]: course_name
Out[8]: 'Post Graduate Certificate Programme in Retail Management (PGCPRM) (Online)'

In [9]: print re.sub('\([A-Z]+\)\s*', '', course_name)
Post Graduate Certificate Programme in Retail Management (Online)

In [17]: print re.search('\(([A-Z]+)\)\s*', course_name).groups()[0]
PGCPRM

Answer 3

在第一个括号内提取值

>>> course_name = "Post Graduate Certificate Programme in Retail Management (PGCPRM) (Online)"
>>> x = re.search(r'\(.*?\)',course_name).group()
>>> x
'(PGCPRM)'

然后替换

>>> course_name.replace(x,'')
'Post Graduate Certificate Programme in Retail Management  (Online)'

使用python正则表达式仅提取第一个匹配项

3 个答案: