启动 django 项目时出现 Pysqlite2 错误

Question

我试图从头开始一个 django 项目，但我有一个错误提示 "ImportError: No Module Named 'pysqlite2'"

我正在使用 Python 3.6.0。我将编写我遵循的步骤

---

Creating project 

> django-admin startproject testproject

Trying to start an app

> python manage.py startapp demo

Immediately after enters that command, it returns me a long text which includes error's path etc.

Traceback (most recent call last):
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 34, in <module>
    from pysqlite2 import dbapi2 as Database
ModuleNotFoundError: No module named 'pysqlite2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 36, in <module>
    from sqlite3 import dbapi2 as Database
  File "/usr/local/lib/python3.6/sqlite3/__init__.py", line 23, in <module>
    from sqlite3.dbapi2 import *
  File "/usr/local/lib/python3.6/sqlite3/dbapi2.py", line 27, in <module>
    from _sqlite3 import *
ModuleNotFoundError: No module named '_sqlite3'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 341, in execute
    django.setup()
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/__init__.py", line 27, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/apps/registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/apps/config.py", line 199, in import_models
    self.models_module = import_module(models_module_name)
  File "/home/berkin/pythonenv/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 978, in _gcd_import
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load
  File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/contrib/auth/models.py", line 4, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/contrib/auth/base_user.py", line 52, in <module>
    class AbstractBaseUser(models.Model):
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/models/base.py", line 119, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/models/base.py", line 316, in add_to_class
    value.contribute_to_class(cls, name)
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/models/options.py", line 214, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/__init__.py", line 33, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/utils.py", line 211, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/utils.py", line 115, in load_backend
    return import_module('%s.base' % backend_name)
  File "/home/berkin/pythonenv/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/home/berkin/pythonenv/local/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 39, in <module>
    raise ImproperlyConfigured("Error loading either pysqlite2 or sqlite3 modules (tried in that order): %s" % exc)
django.core.exceptions.ImproperlyConfigured: Error loading either pysqlite2 or sqlite3 modules (tried in that order): No module named '_sqlite3'

我尝试了什么？ - 我使用 sudo apt get 安装了 sqlite3-dev ... - 我试图安装 pip install pysqlite2 - 我尝试更改虚拟 env 文件夹中的 source.py，但没有成功。

但我发现当我不使用虚拟环境时，我的意思是不输入源/bin/activate，“python manage.py startapp demo”命令已经起作用。当我激活 env 时，它会返回我上面提到的错误。

Answer 1

根据这个答案https://stackoverflow.com/a/23414147/2174832

Python 3.x 没有公开版本的 pysqlite。对于 Python 3.x， 标准库中的 sqlite3 模块是最新的 有 pysqlite 版本。

在激活的 virtualenv 中运行命令 pip install sqlite3 并使用此模块而不是 pysqlite2。要激活您的 virtualenv，请转到 /folderofvirtualenv/bin 并运行命令source activate