For the use of *

Today, with re.findall () returns a List, I would like to take the first few elements

　　then: 

　　print(*re.findall('^[+-]?\d+',str.lstrip()))    # 42

　　But on their own assignment in pycharm in GG:

　　b = *re.findall('[+-]?\d+',a)                       # SyntaxError: can't use starred expression here

　　

　　After reading this article know,

        

 

 

 

　　https://segmentfault.com/q/1010000013637464?utm_source=index-newest