def my (pasword):

   if len (pasword) < 8:

     print("your pasword  smaller is  8")

   elif pasword.isnumeric():

     print("your pasword must have a least one letere")

   elif pasword.isalpha():

       print("have at least one number")

   else:

       ("welcom")

while True:

   pasword=input("plase enter a pasword")

   my(pasword)