Django無法找到psycopg2模塊

我在Amazon EC2服務器上安裝了python 3.5，django 1.10和psycopg2 2.7.1以便使用Postgresql數據庫。我使用python 3的虛擬環境中，並沿用了經典的安裝步驟：Django無法找到psycopg2模塊

cd /home/mycode 
virtualenv-3.5 p3env 
source p3env/bin/activate 
pip install django 
cd kenbot 
django-admin startproject kenbot 
pip install psycopg2

然後我已編輯settings.py文件在我的項目定義數據庫設置：

DATABASES = { 
'default': { 
    'ENGINE': 'django.db.backends.postgresql_psycopg2', 
    'NAME': 'deleted', 
    'USER': 'deleted', 
    'PASSWORD': 'deleted', 
    'HOST': 'deleted', 
    'PORT': '5432', 
}

最後I型（同時還在虛擬環境）：

python manage.py makemigrations

，並獲得以下錯誤：

Traceback (most recent call last): 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/db/backends/postgresql/base.py", line 20, in <module> 
    import psycopg2 as Database 
ImportError: No module named 'psycopg2' 

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/mycode/p3env/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 367, in execute_from_command_line 
    utility.execute() 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 341, in execute 
    django.setup() 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/__init__.py", line 27, in setup 
    apps.populate(settings.INSTALLED_APPS) 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/apps/registry.py", line 108, in populate 
    app_config.import_models(all_models) 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/apps/config.py", line 199, in import_models 
    self.models_module = import_module(models_module_name) 
    File "/home/mycode/p3env/lib64/python3.5/importlib/__init__.py", line 126, in import_module 
    return _bootstrap._gcd_import(name[level:], package, level) 
    File "<frozen importlib._bootstrap>", line 986, in _gcd_import 
    File "<frozen importlib._bootstrap>", line 969, in _find_and_load 
    File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked 
    File "<frozen importlib._bootstrap>", line 673, in _load_unlocked 
    File "<frozen importlib._bootstrap_external>", line 662, in exec_module 
    File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/contrib/auth/models.py", line 4, in <module> 
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/contrib/auth/base_user.py", line 52, in <module> 
    class AbstractBaseUser(models.Model): 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/db/models/base.py", line 119, in __new__ 
    new_class.add_to_class('_meta', Options(meta, app_label)) 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/db/models/base.py", line 316, in add_to_class 
    value.contribute_to_class(cls, name) 
    File "/home/mycode/p3env/local/lib/python3.5/dist-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/mycode/p3env/local/lib/python3.5/dist-packages/django/db/__init__.py", line 33, in __getattr__ 
    return getattr(connections[DEFAULT_DB_ALIAS], item) 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/db/utils.py", line 211, in __getitem__ 
    backend = load_backend(db['ENGINE']) 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/db/utils.py", line 115, in load_backend 
    return import_module('%s.base' % backend_name) 
    File "/home/mycode/p3env/lib64/python3.5/importlib/__init__.py", line 126, in import_module 
    return _bootstrap._gcd_import(name[level:], package, level) 
    File "/home/mycode/p3env/local/lib/python3.5/dist-packages/django/db/backends/postgresql/base.py", line 24, in <module> 
    raise ImproperlyConfigured("Error loading psycopg2 module: %s" % e) 
django.core.exceptions.ImproperlyConfigured: Error loading psycopg2 module: No module named 'psycopg2'

我還沒有在stackoverflow上找到此問題。有一點可能是相關的，當我瀏覽我的虛擬環境目錄時，我注意到django安裝在/home/mycode/p3env/lib/python3.5/dist-packages，而psysopg2在/ home/mycode/p3env中/lib64/python3.5/dist-packages。

感謝您的幫助！

來源

2017-04-06 Ken

我反對這個問題，只需再次運行'pip install psycopg2'。 – Cody

你的psycopg2包應該和Django一樣存在於python發行版中。既然都是python3.5，你可以複製它。也許你在virtualenv不活躍的時候安裝了它？ – dentemm

@dentemm當我安裝虛擬環境時，虛擬環境絕對是活躍的。但是，簡單地複製這些文件的確有竅門。謝謝！ – Ken

正如@dentemm所示：通過將所有psysopg2目錄從其lib64目錄中的當前位置複製到安裝了django的目錄來解決問題/home/mycode/p3env/lib/python3.5/dist -packages。

來源

2017-04-06 13:11:18 Ken

Django無法找到psycopg2模塊

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