python_ test data generation

  

''' 
You need to write a function that generates a batch number of accounts registered for use.
The end of the account is @ 163.com generated by the length of the user input, generate how many also entered by the user, the user name can not be repeated, the user name must consist of uppercase letters, lowercase letters, numbers

'''
import  string
import  random

NUM = (INPUT (int " number of pieces of data that will be generated in: " ))

# Generate the user name function 
DEF username (NUM):
    user = []
    lenght = int (the INPUT ( " Please enter your user name length: " )) # Enter the user name length 
    the while ! len (the User) = NUM:
        str1 = random.sample ((+ string.ascii_letters string.digits), lenght) # randomly generated username 
        str2 = '' .join (str1) # username spliced into a string by the list 
        IF str2 Not  in User: # string deduplication 
            user1 + str2 = " @ 163.com " + " \ n- "  # string concatenation mailbox 
            user.append (user1) # string in List 
    return User

# Username written to the external file 
DEF OpenFile (filename, the User):
    F = Open (filename, ' W ' , encoding = " UTF-. 8 " ) # open file 
    f.writelines (User) # The file list writing row 
    f.close ()


OpenFile ( ' a.txt ' , username (NUM)) # retrieval function