Django：启动迁移到 heroku 时没有名为 'psycopg2' 的模块
Django: No module named 'psycopg2' when launching migrations to heroku
我是 django 的新手，我创建了一个网站，现在我处于部署阶段，一切都很好 运行 直到启动从数据库迁移到服务器。我会向你展示我从一开始所做的一切
我的项目结构
OC_project8/
pur_beurre/
catalog/
dumps/
catalog.json
... # other classic file
media/
pur_beurre/
static/
.gitignore
... # other classic file
static/
templates/
users/
manage.py
Procfile
venv/
requirements.txt/
certifi==2019.9.11
chardet==3.0.4
coverage==4.5.4
dj-database-url==0.5.0
Django==2.2.6
django-debug-toolbar==2.0
gunicorn==19.9.0
idna==2.8
mysqlclient==1.4.4
Pillow==6.2.0
pytz==2019.3
requests==2.22.0
sqlparse==0.3.0
urllib3==1.25.6
whitenoise==4.1.4
.gitignore/
所有命令在虚拟环境中都是运行，例如：
(venv) ~/OC_project8/pur_beurre$ sudo apt-get install python-psycopg2
我在 运行 命令 git push heroku master 之前完成了所有必要的步骤
(git commit, heroku create my-app ...)
如果您需要有关这些步骤的更多详细信息，请告诉我。
在 运行 执行命令 git push heroku master 之后我遇到了这个错误：
....
remote: Collecting pkg-resources==0.0.0 (from -r /tmp/build_cac68f54540915062647a425c52dc61b/requirements.txt (line 11))
remote: Could not find a version that satisfies the requirement pkg-resources==0.0.0 (from -r/tmp/build_cac68f54540915062647a425c52dc61b/requirements.txt (line 11)) (from versions: )
remote: No matching distribution found for pkg-resources==0.0.0 (from -r /tmp/build_cac68f54540915062647a425c52dc61b/requirements.txt (line 11))
remote: ! Push rejected, failed to compile Python app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to pur-beurre-oc8.
remote:
To https://git.heroku.com/pur-beurre-oc8.git
! [remote rejected] master -> master (pre-receive hook declined)
error: impossible de pousser des références vers 'https://git.heroku.com/pur-beurre-oc8.git'
我在 Whosebug 中看到我必须这样做：
pip uninstall pkg-resources==0.0.0
提交后：
git add requirements.txt
git commit -m "uninstalling pkg-resources==0.0.0"
现在 git push heroku master 工作正常，但是当我访问我的网站时出现错误：Apllication error。我不知道我是不是弄湿了，但我想是因为我还没有完成数据库的迁移。
所以我运行命令heroku run python pur_beurre/manage.py migrate
现在我遇到了这个错误：
Running python pur_beurre/manage.py migrate on ⬢ pur-beurre-oc8... up, run.4138 (Free)
Traceback (most recent call last):
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 20, in <module>
import psycopg2 as Database
ModuleNotFoundError: No module named 'psycopg2'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "pur_beurre/manage.py", line 21, in <module>
main()
File "pur_beurre/manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
utility.execute()
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 357, in execute
django.setup()
File "/app/.heroku/python/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/app/.heroku/python/lib/python3.6/site-packages/django/apps/registry.py", line 114, in populate
app_config.import_models()
File "/app/.heroku/python/lib/python3.6/site-packages/django/apps/config.py", line 211, in import_models
self.models_module = import_module(models_module_name)
File "/app/.heroku/python/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 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/auth/models.py", line 2, in <module>
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/auth/base_user.py", line 47, in <module>
class AbstractBaseUser(models.Model):
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/base.py", line 117, in __new__
new_class.add_to_class('_meta', Options(meta, app_label))
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/base.py", line 321, in add_to_class
value.contribute_to_class(cls, name)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/options.py", line 204, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/__init__.py", line 28, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/utils.py", line 201, in __getitem__
backend = load_backend(db['ENGINE'])
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/utils.py", line 110, in load_backend
return import_module('%s.base' % backend_name)
File "/app/.heroku/python/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "/app/.heroku/python/lib/python3.6/site-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'
我不知道为什么会出现此错误，因为 psycopg2 是使用 PostgreSQL 所需的库，而我正在使用 MySQL，这是我的 settings.py:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'openfoodfacts',
'USER': 'root',
'PASSWORD': 'my-password',
'HOST': '',
'PORT': '5432',
}
}
无论如何在出现这个错误后我尝试安装 psycopg2:
pip install psycopg2
但是我还有一个错误：
Collecting psycopg2
Downloading https://files.pythonhosted.org/ packages/84/d7/6a93c99b5ba4d4d22daa3928b983cec66df4 536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz (377kB)
100% |████████████████████████████████| 378kB 1.8MB/s
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/__init__.py", line 12, in <module>
import setuptools.version
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/version.py", line 1, in <module>
import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-gf4fxs4k/psycopg2/
可能是因为我卸载了这个错误
一开始是 pkg-resources ！但是我尝试重新安装 pkg-resources:
sudo apt-get install --reinstall python-pkg-resources
并且我重新运行命令pip install psycopg2，但仍然有同样的错误
通过在 google 上搜索，我发现这里 No module named pkg_resources 需要 运行 这个命令：
wget https://bootstrap.pypa.io/ez_setup.py -O - | python
我重新运行命令pip install psycopg2，但我有另一个错误：
Collecting psycopg2
Using cached https://files.pythonhosted.org/ packages/84/d7/6a93c99b5ba4d4d22daa3928b983cec66df 4536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz
Complete output from command python setup.py egg_info:
running egg_info
creating pip-egg-info/psycopg2.egg-info
writing pip-egg-info/psycopg2.egg-info/PKG-INFO
writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
Error: pg_config executable not found.
pg_config is required to build psycopg2 from source. Please add the directory
containing pg_config to the $PATH or specify the full executable path with the
option:
python setup.py build_ext --pg-config /path/to/pg_config build ...
or with the pg_config option in 'setup.cfg'.
If you prefer to avoid building psycopg2 from source, please install the PyPI
'psycopg2-binary' package instead.
For further information please check the 'doc/src/install.rst' file (also at
<http://initd.org/psycopg/docs/install.html>).
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-sglmdb2o/psycopg2/
如果我 运行 命令 which pg_config 它 return 没什么，但经过一些研究后我喜欢这里 pg_config executable not found 有必要 运行这个命令：
sudo apt-get install libpq-dev
现在 which pg_config return 这个：
/usr/bin/pg_config
所以我重新运行 pip install psycopg2 并且发生了另一个错误：
Collecting psycopg2
Using cached https://files.pythonhosted.org/ packages/84/d7/6a93c99b5ba4d4d22 daa3928b983cec66df4536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz
Building wheels for collected packages: psycopg2
Running setup.py bdist_wheel for psycopg2 ... error
Complete output from command /home/rouizi/OC_project8/venv/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-lu4ihs81/psycopg2/setup.py';f=getattr(tokenize,
'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmphgjf714ppip-wheel- --python-tag cp36:
usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
or: -c --help [cmd1 cmd2 ...]
or: -c --help-commands
or: -c cmd --help
error: invalid command 'bdist_wheel'
----------------------------------------
Failed building wheel for psycopg2
Running setup.py clean for psycopg2
Failed to build psycopg2
Installing collected packages: psycopg2
Running setup.py install for psycopg2 ... error
#I cut here because it's very long
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-lu4ihs81/psycopg2/setup.py", line 611, in <module>
'Documentation': 'http://initd.org/psycopg/docs/',
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/__init__.py", line 129, in setup
return distutils.core.setup(**attrs)
File "/usr/lib/python3.6/distutils/core.py", line 148, in setup
dist.run_commands()
File "/usr/lib/python3.6/distutils/dist.py", line 955, in run_commands
self.run_command(cmd)
File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/command/install.py", line 61, in run
return orig.install.run(self)
File "/usr/lib/python3.6/distutils/command/install.py", line 601, in run
self.run_command(cmd_name)
File "/usr/lib/python3.6/distutils/cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/command/install_scripts.py", line 17, in run
import setuptools.command.easy_install as ei
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/command/easy_install.py", line 47, in <module>
from setuptools.sandbox import run_setup
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/sandbox.py", line 15, in <module>
import pkg_resources.py31compat
ModuleNotFoundError: No module named 'pkg_resources.py31compat'
----------------------------------------
Command "/home/rouizi/OC_project8/venv/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-lu4ihs81/psycopg2/setup.py';f=getattr(tokenize, 'open', open)(__file__)
;code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-eya3xv3b-record/install-record.txt --single-version-externally-managed
--compile --install-headers /home/rouizi/OC_project8/venv/include/site/python3.6/psycopg2" failed with error code 1 in /tmp/pip-build-lu4ihs81/psycopg2/
我试过这个命令：
sudo apt-get install --reinstall python-setuptools
现在当我尝试 运行 pip install psycopg2 他 return 对我说：
Requirement already satisfied: psycopg2 in /home/rouizi/OC_project8/venv/lib/python3.6/site-packages
但是如果我尝试 运行 命令 heroku run python pur_beurre/manage.py migrate 我仍然有错误：
django.core.exceptions.ImproperlyConfigured: Error loading psycopg2 module: No module named 'psycopg2'
但是如果我 运行 sudo apt-get install python-psycopg2 它工作了但是我在 运行ing heroku run python pur_beurre/manage.py migrate 时仍然有错误
由于我仍然有同样的错误，所以我尝试卸载 psycopg2:
sudo pip uninstall psycopg2
但是 return 对我来说：
The directory '/home/rouizi/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Not uninstalling psycopg2 at /usr/lib/python2.7/dist-packages, outside environment /usr
然后卡了一天没找到解决办法，希望大家帮忙
抱歉这么长 post 和我的拼写错误
我的问题解决了！
我 运行 命令 pip install psycopg2，它 return 给我的错误是：
ModuleNotFoundError: No module named 'pkg_resources.py31compat'
但是如果我尝试重新运行命令 pip install psycopg2，它会显示：
Requirement already satisfied: psycopg2 in /home/rouizi/OC_project8/venv/lib/python3.6/site-packages
所以我尝试提交更改：
pip freeze > requirements.txt
git add requirements.txt
git commit -m "installing psycopg2"
git push heroku master
现在 heroku run python pur_beurre/manage.py migrate 工作正常。
不知道为什么一直报错，如果有人能解释一下就好了
我是 django 的新手，我创建了一个网站，现在我处于部署阶段，一切都很好 运行 直到启动从数据库迁移到服务器。我会向你展示我从一开始所做的一切
我的项目结构
OC_project8/
pur_beurre/
catalog/
dumps/
catalog.json
... # other classic file
media/
pur_beurre/
static/
.gitignore
... # other classic file
static/
templates/
users/
manage.py
Procfile
venv/
requirements.txt/
certifi==2019.9.11
chardet==3.0.4
coverage==4.5.4
dj-database-url==0.5.0
Django==2.2.6
django-debug-toolbar==2.0
gunicorn==19.9.0
idna==2.8
mysqlclient==1.4.4
Pillow==6.2.0
pytz==2019.3
requests==2.22.0
sqlparse==0.3.0
urllib3==1.25.6
whitenoise==4.1.4
.gitignore/
所有命令在虚拟环境中都是运行，例如：
(venv) ~/OC_project8/pur_beurre$ sudo apt-get install python-psycopg2
我在 运行 命令 git push heroku master 之前完成了所有必要的步骤 (git commit, heroku create my-app ...) 如果您需要有关这些步骤的更多详细信息，请告诉我。
在 运行 执行命令 git push heroku master 之后我遇到了这个错误：
....
remote: Collecting pkg-resources==0.0.0 (from -r /tmp/build_cac68f54540915062647a425c52dc61b/requirements.txt (line 11))
remote: Could not find a version that satisfies the requirement pkg-resources==0.0.0 (from -r/tmp/build_cac68f54540915062647a425c52dc61b/requirements.txt (line 11)) (from versions: )
remote: No matching distribution found for pkg-resources==0.0.0 (from -r /tmp/build_cac68f54540915062647a425c52dc61b/requirements.txt (line 11))
remote: ! Push rejected, failed to compile Python app.
remote:
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to pur-beurre-oc8.
remote:
To https://git.heroku.com/pur-beurre-oc8.git
! [remote rejected] master -> master (pre-receive hook declined)
error: impossible de pousser des références vers 'https://git.heroku.com/pur-beurre-oc8.git'
我在 Whosebug 中看到我必须这样做：
pip uninstall pkg-resources==0.0.0
提交后：
git add requirements.txt
git commit -m "uninstalling pkg-resources==0.0.0"
现在 git push heroku master 工作正常，但是当我访问我的网站时出现错误：Apllication error。我不知道我是不是弄湿了，但我想是因为我还没有完成数据库的迁移。
所以我运行命令heroku run python pur_beurre/manage.py migrate
现在我遇到了这个错误：
Running python pur_beurre/manage.py migrate on ⬢ pur-beurre-oc8... up, run.4138 (Free)
Traceback (most recent call last):
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 20, in <module>
import psycopg2 as Database
ModuleNotFoundError: No module named 'psycopg2'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "pur_beurre/manage.py", line 21, in <module>
main()
File "pur_beurre/manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
utility.execute()
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 357, in execute
django.setup()
File "/app/.heroku/python/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/app/.heroku/python/lib/python3.6/site-packages/django/apps/registry.py", line 114, in populate
app_config.import_models()
File "/app/.heroku/python/lib/python3.6/site-packages/django/apps/config.py", line 211, in import_models
self.models_module = import_module(models_module_name)
File "/app/.heroku/python/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 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/auth/models.py", line 2, in <module>
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/auth/base_user.py", line 47, in <module>
class AbstractBaseUser(models.Model):
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/base.py", line 117, in __new__
new_class.add_to_class('_meta', Options(meta, app_label))
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/base.py", line 321, in add_to_class
value.contribute_to_class(cls, name)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/models/options.py", line 204, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/__init__.py", line 28, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/utils.py", line 201, in __getitem__
backend = load_backend(db['ENGINE'])
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/utils.py", line 110, in load_backend
return import_module('%s.base' % backend_name)
File "/app/.heroku/python/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "/app/.heroku/python/lib/python3.6/site-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'
我不知道为什么会出现此错误，因为 psycopg2 是使用 PostgreSQL 所需的库，而我正在使用 MySQL，这是我的 settings.py:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'openfoodfacts',
'USER': 'root',
'PASSWORD': 'my-password',
'HOST': '',
'PORT': '5432',
}
}
无论如何在出现这个错误后我尝试安装 psycopg2:
pip install psycopg2
但是我还有一个错误：
Collecting psycopg2
Downloading https://files.pythonhosted.org/ packages/84/d7/6a93c99b5ba4d4d22daa3928b983cec66df4 536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz (377kB)
100% |████████████████████████████████| 378kB 1.8MB/s
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/__init__.py", line 12, in <module>
import setuptools.version
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/version.py", line 1, in <module>
import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-gf4fxs4k/psycopg2/
可能是因为我卸载了这个错误 一开始是 pkg-resources ！但是我尝试重新安装 pkg-resources:
sudo apt-get install --reinstall python-pkg-resources
并且我重新运行命令pip install psycopg2，但仍然有同样的错误
通过在 google 上搜索，我发现这里 No module named pkg_resources 需要 运行 这个命令：
wget https://bootstrap.pypa.io/ez_setup.py -O - | python
我重新运行命令pip install psycopg2，但我有另一个错误：
Collecting psycopg2
Using cached https://files.pythonhosted.org/ packages/84/d7/6a93c99b5ba4d4d22daa3928b983cec66df 4536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz
Complete output from command python setup.py egg_info:
running egg_info
creating pip-egg-info/psycopg2.egg-info
writing pip-egg-info/psycopg2.egg-info/PKG-INFO
writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
Error: pg_config executable not found.
pg_config is required to build psycopg2 from source. Please add the directory
containing pg_config to the $PATH or specify the full executable path with the
option:
python setup.py build_ext --pg-config /path/to/pg_config build ...
or with the pg_config option in 'setup.cfg'.
If you prefer to avoid building psycopg2 from source, please install the PyPI
'psycopg2-binary' package instead.
For further information please check the 'doc/src/install.rst' file (also at
<http://initd.org/psycopg/docs/install.html>).
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-sglmdb2o/psycopg2/
如果我 运行 命令 which pg_config 它 return 没什么，但经过一些研究后我喜欢这里 pg_config executable not found 有必要 运行这个命令：
sudo apt-get install libpq-dev
现在 which pg_config return 这个：
/usr/bin/pg_config
所以我重新运行 pip install psycopg2 并且发生了另一个错误：
Collecting psycopg2
Using cached https://files.pythonhosted.org/ packages/84/d7/6a93c99b5ba4d4d22 daa3928b983cec66df4536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz
Building wheels for collected packages: psycopg2
Running setup.py bdist_wheel for psycopg2 ... error
Complete output from command /home/rouizi/OC_project8/venv/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-lu4ihs81/psycopg2/setup.py';f=getattr(tokenize,
'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmphgjf714ppip-wheel- --python-tag cp36:
usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
or: -c --help [cmd1 cmd2 ...]
or: -c --help-commands
or: -c cmd --help
error: invalid command 'bdist_wheel'
----------------------------------------
Failed building wheel for psycopg2
Running setup.py clean for psycopg2
Failed to build psycopg2
Installing collected packages: psycopg2
Running setup.py install for psycopg2 ... error
#I cut here because it's very long
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-lu4ihs81/psycopg2/setup.py", line 611, in <module>
'Documentation': 'http://initd.org/psycopg/docs/',
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/__init__.py", line 129, in setup
return distutils.core.setup(**attrs)
File "/usr/lib/python3.6/distutils/core.py", line 148, in setup
dist.run_commands()
File "/usr/lib/python3.6/distutils/dist.py", line 955, in run_commands
self.run_command(cmd)
File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/command/install.py", line 61, in run
return orig.install.run(self)
File "/usr/lib/python3.6/distutils/command/install.py", line 601, in run
self.run_command(cmd_name)
File "/usr/lib/python3.6/distutils/cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "/usr/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/command/install_scripts.py", line 17, in run
import setuptools.command.easy_install as ei
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/command/easy_install.py", line 47, in <module>
from setuptools.sandbox import run_setup
File "/home/rouizi/OC_project8/venv/lib/python3.6/site-packages/setuptools/sandbox.py", line 15, in <module>
import pkg_resources.py31compat
ModuleNotFoundError: No module named 'pkg_resources.py31compat'
----------------------------------------
Command "/home/rouizi/OC_project8/venv/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-lu4ihs81/psycopg2/setup.py';f=getattr(tokenize, 'open', open)(__file__)
;code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-eya3xv3b-record/install-record.txt --single-version-externally-managed
--compile --install-headers /home/rouizi/OC_project8/venv/include/site/python3.6/psycopg2" failed with error code 1 in /tmp/pip-build-lu4ihs81/psycopg2/
我试过这个命令：
sudo apt-get install --reinstall python-setuptools
现在当我尝试 运行 pip install psycopg2 他 return 对我说：
Requirement already satisfied: psycopg2 in /home/rouizi/OC_project8/venv/lib/python3.6/site-packages
但是如果我尝试 运行 命令 heroku run python pur_beurre/manage.py migrate 我仍然有错误：
django.core.exceptions.ImproperlyConfigured: Error loading psycopg2 module: No module named 'psycopg2'
但是如果我 运行 sudo apt-get install python-psycopg2 它工作了但是我在 运行ing heroku run python pur_beurre/manage.py migrate 时仍然有错误
由于我仍然有同样的错误，所以我尝试卸载 psycopg2:
sudo pip uninstall psycopg2
但是 return 对我来说：
The directory '/home/rouizi/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Not uninstalling psycopg2 at /usr/lib/python2.7/dist-packages, outside environment /usr
然后卡了一天没找到解决办法，希望大家帮忙
抱歉这么长 post 和我的拼写错误
我的问题解决了！
我 运行 命令 pip install psycopg2，它 return 给我的错误是：
ModuleNotFoundError: No module named 'pkg_resources.py31compat'
但是如果我尝试重新运行命令 pip install psycopg2，它会显示：
Requirement already satisfied: psycopg2 in /home/rouizi/OC_project8/venv/lib/python3.6/site-packages
所以我尝试提交更改：
pip freeze > requirements.txt
git add requirements.txt
git commit -m "installing psycopg2"
git push heroku master
现在 heroku run python pur_beurre/manage.py migrate 工作正常。
不知道为什么一直报错，如果有人能解释一下就好了