完整報錯如下:

(python3.7) appleyuchi@ubuntu19:django-oscar$ pip ?install -r ?requirements_migrations.txt?
Looking in indexes: http://pypi.douban.com/simple
Collecting PyMySQL==0.9.3
? Downloading http://pypi.doubanio.com/packages/ed/39/15045ae46f2a123019aa968dfcba0396c161c20f855f11dea6796bcaae95/PyMySQL-0.9.3-py2.py3-none-any.whl (47 kB)
? ? ?|████████████████████████████████| 47 kB 14.1 MB/s?
Collecting psycopg2==2.8.4
? Downloading http://pypi.doubanio.com/packages/84/d7/6a93c99b5ba4d4d22daa3928b983cec66df4536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz (377 kB)
? ? ?|████████████████████████████████| 377 kB 2.0 MB/s?
? ? ERROR: Command errored out with exit status 1:
? ? ?command: /home/appleyuchi/.virtualenvs/python3.7/bin/python3.7 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-3pvirr0y/psycopg2/setup.py'"'"'; __file__='"'"'/tmp/pip-install-3pvirr0y/psycopg2/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-3pvirr0y/psycopg2/pip-egg-info
? ? ? ? ?cwd: /tmp/pip-install-3pvirr0y/psycopg2/
? ? Complete output (23 lines):
? ? running egg_info
? ? creating /tmp/pip-install-3pvirr0y/psycopg2/pip-egg-info/psycopg2.egg-info
? ? writing /tmp/pip-install-3pvirr0y/psycopg2/pip-egg-info/psycopg2.egg-info/PKG-INFO
? ? writing dependency_links to /tmp/pip-install-3pvirr0y/psycopg2/pip-egg-info/psycopg2.egg-info/dependency_links.txt
? ? writing top-level names to /tmp/pip-install-3pvirr0y/psycopg2/pip-egg-info/psycopg2.egg-info/top_level.txt
? ? writing manifest file '/tmp/pip-install-3pvirr0y/psycopg2/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>).
? ??
? ? ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
?

?

解決方案:

apt install?libpq-dev

總結

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