没有名为 django.contrib.auth.hasers 的模块

如何解决没有名为 django.contrib.auth.hasers 的模块

我正在制作一个用户注册和登录网站，其中我使用的是 Django。我已经执行了 pip install django[argon2]，但错误 No module named 'django.contrib.auth.hashers.Argon2PasswordHasherdjango'; 'django.contrib.auth.hashers' is not a package 不断出现。

settings.py

​​>

    """
Django settings for User_Authentication project.

Generated by 'django-admin startproject' using Django 3.1.7.

For more information on this file,see
https://docs.djangoproject.com/en/3.1/topics/settings/

For the full list of settings and their values,see
https://docs.djangoproject.com/en/3.1/ref/settings/
"""

from pathlib import Path
import os

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent
TEMPLATE_DIR  = os.path.join(BASE_DIR,"templates")
STATIC_DIR = os.path.join(BASE_DIR,"static")
MEDIA_DIR = os.path.join(BASE_DIR,"media")


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/3.1/howto/deployment/checklist/

# Security WARNING: keep the secret key used in production secret!
SECRET_KEY = ')o5ax4nab1hip&ef6z^g_19if25lexbpzf=vks&6s#lwi!wx_('

# Security WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application deFinition

INSTALLED_APPS = [
    'django.contrib.admin','django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.messages','django.contrib.staticfiles','basic_app'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware','django.contrib.sessions.middleware.SessionMiddleware','django.middleware.common.CommonMiddleware','django.middleware.csrf.CsrfViewMiddleware','django.contrib.auth.middleware.AuthenticationMiddleware','django.contrib.messages.middleware.MessageMiddleware','django.middleware.clickjacking.XFrameOptionsMiddleware',]

ROOT_URLconf = 'User_Authentication.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates','Dirs': [TEMPLATE_DIR,],'APP_Dirs': True,'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug','django.template.context_processors.request','django.contrib.auth.context_processors.auth','django.contrib.messages.context_processors.messages',},]

Wsgi_APPLICATION = 'User_Authentication.wsgi.application'


# Database
# https://docs.djangoproject.com/en/3.1/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3','NAME': BASE_DIR / 'db.sqlite3',}
}


# Password validation
# https://docs.djangoproject.com/en/3.1/ref/settings/#auth-password-validators

PASSWORD_HASHERS = [
    'django.contrib.auth.hashers.Argon2PasswordHasher'
    'django.contrib.auth.hashers.BCryptSHA256PasswordHasher'
    'django.contrib.auth.hashers.BCryptPasswordHasher'
    'django.contrib.auth.hashers.PBKDF2PasswordHasher'
    'django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher',]

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',{
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator','OPTIONS': {'min_length': 9}
    },{
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',{
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',]


# Internationalization
# https://docs.djangoproject.com/en/3.1/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS,JavaScript,Images)
# https://docs.djangoproject.com/en/3.1/howto/static-files/

STATIC_URL = '/static/'
STATICFILES_Dirs = [
    STATIC_DIR,]

# Media
MEDIA_ROOT = MEDIA_DIR
MEDIA_URL = '/media/'

收到的回溯是

    Traceback (most recent call last):
  File "/home/swati/Documents/Django_Tutorial/venv/lib/python3.6/site-packages/django/core/handlers/exception.py",line 47,in inner
    response = get_response(request)
  File "/home/swati/Documents/Django_Tutorial/venv/lib/python3.6/site-packages/django/core/handlers/base.py",line 181,in _get_response
    response = wrapped_callback(request,*callback_args,**callback_kwargs)
  File "/home/swati/Documents/Django_Tutorial/User_Authentication/basic_app/views.py",line 22,in register
    user.set_password(user.password)        # Hashing the passwords -> Encrypting them
  File "/home/swati/Documents/Django_Tutorial/venv/lib/python3.6/site-packages/django/contrib/auth/base_user.py",line 99,in set_password
    self.password = make_password(raw_password)
  File "/home/swati/Documents/Django_Tutorial/venv/lib/python3.6/site-packages/django/contrib/auth/hashers.py",line 80,in make_password
    hasher = get_hasher(hasher)
  File "/home/swati/Documents/Django_Tutorial/venv/lib/python3.6/site-packages/django/contrib/auth/hashers.py",line 121,in get_hasher
    return get_hashers()[0]
  File "/home/swati/Documents/Django_Tutorial/venv/lib/python3.6/site-packages/django/contrib/auth/hashers.py",line 89,in get_hashers
    hasher_cls = import_string(hasher_path)
  File "/home/swati/Documents/Django_Tutorial/venv/lib/python3.6/site-packages/django/utils/module_loading.py",line 17,in import_string
    module = import_module(module_path)
  File "/usr/lib/python3.6/importlib/__init__.py",line 126,in import_module
    return _bootstrap._gcd_import(name[level:],package,level)
  File "<frozen importlib._bootstrap>",line 994,in _gcd_import
  File "<frozen importlib._bootstrap>",line 971,in _find_and_load
  File "<frozen importlib._bootstrap>",line 941,in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>",line 219,in _call_with_frames_removed
  File "<frozen importlib._bootstrap>",line 950,in _find_and_load_unlocked
ModuleNotFoundError: No module named 'django.contrib.auth.hashers.Argon2PasswordHasherdjango'; 'django.contrib.auth.hashers' is not a package

我还尝试在终端中的同一工作目录中导入 django.contrib.auth.hashers。它对 django.contrib.auth.hashers 导入很好，但是一旦导入 django.contrib.auth.hashers.Argon2PasswordHasher，它就会生成

Traceback (most recent call last):
  File "<stdin>",line 1,in <module>
ModuleNotFoundError: No module named 'django.contrib.auth.hashers.Argon2PasswordHasher'; 'django.contrib.auth.hashers' is not a package

我还尝试注释掉 Argon2PasswordHasher 并让其他哈希器工作，但它为 PASSWORD_HASHERS 中列出的所有哈希器生成了相同的错误

解决方法

这里需要注意的是

• django.contrib.auth.hashers 是安装在您的案例中的软件包。
• 但是 Argon2PasswordHasher 是包 django.contrib.auth.hashers 内的类

所以你需要像这样导入类

from django.contrib.auth.hashers import Argon2PasswordHasher

您也可以导入整个包并使用其类，如下所示

import django.contrib.auth.hashers as hasher  

# using the class inside package
hasher.Argon2PasswordHasher()