ubuntu 安装psycopg2包

psycopg2 库是 python 用来操作 postgreSQL 数据库的第三方库。

执行：pip3 install psycopg2==2.8.4

有可能会报错：

Collecting psycopg2==2.8.4
  Downloading https://files.pythonhosted.org/packages/84/d7/6a93c99b5ba4d4d22daa3928b983cec66df4536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz (377kB)
    100% |████████████████████████████████| 378kB 1.1MB/s
    Complete output from command python setup.py egg_info:
    running egg_info
    creating pip-egg-info/psycopg2.egg-info
    writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
    writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
    writing pip-egg-info/psycopg2.egg-info/PKG-INFO
    writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
    /usr/lib/python3.5/distutils/dist.py:261: UserWarning: Unknown distribution option: 'project_urls'
      warnings.warn(msg)
    /usr/lib/python3.5/distutils/dist.py:261: UserWarning: Unknown distribution option: 'python_requires'
      warnings.warn(msg)
    warning: manifest_maker: standard file '-c' not found

    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-txs3m3mb/psycopg2/

解决方法

sudo apt-get install postgresql
sudo apt-get install python-psycopg2
sudo apt-get install libpq-dev
pip3 install psycopg2==2.8.4