文件修改

# f= open(r'unifo.py',mode='r',encoding='utf-8')
# f2 = open(r'b.txt',mode='w',encoding='utf-8')
# for i in f:
#     username,password = i.split('|')
#     if username =='李sir':
#         password='999/n'
#     print(username,password)
#     f2.write('|'.join([username,password]))
# f.close()
# f2.close()
# import os
# os.remove(r'unifo.py')
# os.rename(r'b.txt','unifo.txt')