for与if、else的使用

 #!/usr/bin/env python
 def fun3(x) :
     num =0
     for i in x :
         if i == "" :
             num += 1
     if num == 0 :
         a = "没有空内容"
     else :
         a = "有空内容"
     return print(a)

 s = ['','','wqw','']
 fun3(s)