Django账号密码修改命令：
python manage.py changepassword
python manage.py changepassword
实操分析：
第一次修改失败是因为违反了密码策略，密码至少8位，且不能全是数字
第二次修改失败是因为密码中包含了账户，导致密码与账号太相似。
(env) E:\pyAPP\sysPro>python manage.py changepassword
CommandError: user 'liujun' does not exist
(env) E:\pyAPP\sysPro>python manage.py changepassword admin
Changing password for user 'admin'
Password:
Password (again):
密码只包含数字。
Password:
Password (again):
密码只包含数字。
Password:
Password (again):
密码跟 用户名 太相似了。
CommandError: Aborting password change for user 'admin' after 3 attempts
(env) E:\pyAPP\sysPro>python manage.py changepassword admin
Changing password for user 'admin'
Password:
Password (again):
Password changed successfully for user 'admin'
(env) E:\pyAPP\sysPro>
