我正在使用virtualenv,我需要安装“psycopg2”。

我做了以下几点:

pip install http://pypi.python.org/packages/source/p/psycopg2/psycopg2-2.4.tar.gz#md5=24f4368e2cfdc1a2b03282ddda814160

我有以下信息:

Downloading/unpacking http://pypi.python.org/packages/source/p/psycopg2/psycopg2
-2.4.tar.gz#md5=24f4368e2cfdc1a2b03282ddda814160
  Downloading psycopg2-2.4.tar.gz (607Kb): 607Kb downloaded
  Running setup.py egg_info for package from http://pypi.python.org/packages/sou
rce/p/psycopg2/psycopg2-2.4.tar.gz#md5=24f4368e2cfdc1a2b03282ddda814160
    Error: pg_config executable not found.

    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'.
    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 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 manifest file 'pip-egg-info\psycopg2.egg-info\SOURCES.txt'

warning: manifest_maker: standard file '-c' not found

Error: pg_config executable not found.



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'.

----------------------------------------
Command python setup.py egg_info failed with error code 1
Storing complete log in C:\Documents and Settings\anlopes\Application Data\pip\p
ip.log

我的问题是,我只需要这样做来让psycopg2工作?

python setup.py build_ext --pg-config /path/to/pg_config build ...

当前回答

在Mac Mavericks与Postgres。在安装Postgres后,我需要使用以下代码:

sudo PATH=$PATH:/Applications/Postgres.app/Contents/Versions/9.3/bin pip install psycopg2 . sudo PATH=$PATH:/Applications/Postgres.app/Contents/Versions/9.3/bin

其他回答

我有这个问题,主要原因是安装了2个相同的版本。postgres写的。一个是HomeBrew的。

如果您选择只保留APP:

brew unlink postgresql
pip3 install psycopg2

我最近在一台windows计算机上配置了psycopg2。最简单的安装是使用windows可执行二进制文件。你可以在http://stickpeople.com/projects/python/win-psycopg/上找到它。

要在虚拟环境中安装本机二进制文件,请使用easy_install:

C:\virtualenv\Scripts\> activate.bat
(virtualenv) C:\virtualenv\Scripts\> easy_install psycopg2-2.5.win32-py2.7-pg9.2.4-release.exe

注意:自从一段时间以前,在PyPI中有Windows的二进制轮,所以这对Windows用户来说应该不再是一个问题。下面是Linux和Mac用户的解决方案,因为他们中的许多人是通过网络搜索找到这篇文章的。


选项1

安装psycopg2-binary PyPI包,它有适用于Linux和Mac OS的Python轮。

pip install psycopg2-binary

选项2

安装从源代码构建psycopg2包的先决条件:

Debian/Ubuntu

Python 3

sudo apt install libpq-dev python3-dev

你可能需要安装python3.8-dev或类似的程序,例如Python 3.8。

Python 2

sudo apt install libpq-dev python-dev

如果这还不够,那就试试

sudo apt install build-essential

or

sudo apt install postgresql-server-dev-all

在再次安装psycopg2之前。

CentOS 6

请看班杰的回答

操作系统

请看nichochar的回答

对于fedora用户:

Libpq-dev是依赖项之一,但是,在安装中应该这样命名这个包:libpq-devel

所以这应该解决了Fedora的问题:

sudo yum install libpq-devel

到目前为止,答案太像魔法食谱了。您收到的错误告诉您pip无法找到PostgreSQL查询库中所需的部分。这可能是因为你把它安装在一个非标准的地方,这就是为什么消息建议使用——pg-config选项。

但更常见的原因是根本没有安装libpq。这通常发生在你没有安装PostgreSQL服务器的机器上,因为你只想运行客户端应用程序,而不是服务器本身。每个操作系统/发行版都是不同的,例如在Debian/Ubuntu上你需要安装libpq-dev。这允许你根据PostgreSQL查询库编译和链接代码。

Most of the answers also suggest installing a Python dev library. Be careful. If you are only using the default Python installed by your distro, that will work, but if you have a newer version, it could cause problems. If you have built Python on this machine then you already have the dev libraries needed for compiling C/C++ libraries to interface with Python. As long as you are using the correct pip version, the one installed in the same bin folder as the python binary, then you are all set. No need to install the old version.