1. 查找正则表达式

   import rere_txt = re.compile(r'(\d)*.txt')m = re_txt.search(src)if not m == None:    m.group(0) #complete str    m.group(1) # first group string

2. 匹配正则表达式

   if re.match(r'(\d)*.txt',path):    print("match")else:    print("not match")

3. 分割正则表达式

   list = re.split(r'\d',string)

4. 替换正则表达式

   re.sub(r'\d*',rep,src)

参考