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

这对我来说是有效的(关于RHEL, CentOS:

sudo yum install postgresql postgresql-devel python-devel

现在在你的pip install中包含你的postgresql二进制目录的路径:

sudo PATH=$PATH:/usr/pgsql-9.3/bin/ pip install psycopg2

确保包含正确的路径。就这些。

更新:对于python3,请安装python3-devel而不是python-devel

其他回答

我在PG的下载网站http://www.postgresql.org/download/linux/redhat/上使用RedHat / CentOS存储库安装了Postgresql92

为了获得pg_config,我必须将/usr/pgsql-9.2/bin添加到PATH。

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.

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

For MacOS,

使用下面的命令来安装psycopg2,效果非常好!!

env LDFLAGS="-I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib" pip install psycopg2

在macOS Mojave上,请确保您在最新更新的命令行工具10.3 -这对我有用-用软件更新更新了它,Mojave上的命令行工具的以前版本对我不起作用。