import hashlib

phone_num = open("D:/testdata/phone10.txt","r")

out_file = open("D:/testdata/after_md5.txt", "w")

md5 = hashlib.md5()

for line in phone_num:

    md5.update(line.encode('utf-8'))

    r = md5.hexdigest()

    out_file.write(r+'\n')

out_file.close()