A randomly generated phone number to ensure no repeat

Import Random
 Import the os.path 

DEF get_mobile_no (mobile_no_file_path): 

    mobile_no = "" 
    prifix = [135,136,137,138,150,159,188 ] 

    the while . 1 : 
       # randomly selecting a beginning 
        mobile_prifix = The random.choice (prifix) 
       # After eight randomly generated 
        mobile_postfix = the random.randint (10000000 , 99999999 ) 
       # splicing 
        mobile_no = STR (mobile_prifix) + STR (mobile_postfix) 
       # determines whether a file exists
         the try : 
            with Open (mobile_no_file_path, " A + ") as fp:
                #判重逻辑
                if mobile_no in fp.read():
                    continue
                #写入文件  
                fp.write(mobile_no+"\n")
                break
        except  Exception as e:
            with open("no.txt","a+") as fp:
                if mobile_no in fp.read():
                    continue
                fp.write(mobile_no+"\n")
                break
    return mobile_no

print(get_mobile_no("d:\\no2.txt"))

 

 

Generating a random number can be used eight zfill

Python zfill () method returns a specified length of the original string right justified, padded with zeros in front.

Code changes:

import random
import os.path

def get_mobile_no(mobile_no_file_path):

    mobile_no =""
    prifix =[135,136,137,138,150,159,188]

    while 1:
        mobile_prifix =random.choice(prifix)
        mobile_postfix =str(random.randint(0,99999999)).zfill(8)#从0开始，用zfill生成八位数
        mobile_no =str(mobile_prifix)+str(mobile_postfix)
        try:
            with open(mobile_no_file_path,"a+") as fp:
                if mobile_no in fp.read():
                    continue
                fp.write(mobile_no+"\n")
                break
        except  Exception as e:
            with open("no.txt","a+") as fp:
                if mobile_no in fp.read():
                    continue
                fp.write(mobile_no+"\n")
                break
    return mobile_no

print(get_mobile_no("d:\\no2.txt"))

 

 

Remaining problems: a list of serial overtaken?