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安装python依赖包psycopg2来调用postgresql的操作

2021-01-02 09:56:41 来源:易采站长站 作者:

安装python依赖包psycopg2来调用postgresql的操作,组件,报错,命令,解决方案,的是

安装python依赖包psycopg2来调用postgresql的操作

易采站长站,站长之家为您整理了安装python依赖包psycopg2来调用postgresql的操作的相关内容。

1、先安装psycopg2的依赖组件

本案例的操作系统为linux red hat

在安装python依赖包psycopg之前,你必须需要先安装postgresql数据库的相关组件:

postgresql-devel,postgresql,postgresql-libs这三个组件比较重要。另外,可选组件:postgresql-server

安装上述组件之前,可以用命令来查看你的系统现在是否已经安装了相关组件:

[root@dthost27 ~]# rpm -qa | grep PostgreSQL

如果都没有安装,则可执行命令如下:

[root@dthost27 ~]# yum install postgresql-devel

(安装过程中会顺带安装上postgresql和postgresql-libs组件)

2、安装psycopg2依赖包

保证依赖组件存在后,就可以使用pip命令安装了:

[root@dthost27 ~]# pip install psycopg2-binary

注:这里安装的是binary格式的psycopg2依赖包,其实安装psycopg2也可以,但是有时候执行pip install psycopg2会报错,而安装psycopg2-binary(编译后)则不会

启动python测试

import psycopg2

补充:安装psycopg2报错_解决方案

报错信息

(python3-virtualenv) [root@vl-bg-anaylsis02 extract_log]# pip3 install psycopg2
Collecting psycopg2
 Using cached psycopg2-2.8.4.tar.gz (377 kB)
  ERROR: Command errored out with exit status 1:
   command: /disk2/extract_log/python3-virtualenv/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-2d9wyu3k/psycopg2/setup.py'"'"'; __file__='"'"'/tmp/pip-install-2d9wyu3k/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-2d9wyu3k/psycopg2/pip-egg-info
     cwd: /tmp/pip-install-2d9wyu3k/psycopg2/
  Complete output (23 lines):
  running egg_info
  creating /tmp/pip-install-2d9wyu3k/psycopg2/pip-egg-info/psycopg2.egg-info
  writing /tmp/pip-install-2d9wyu3k/psycopg2/pip-egg-info/psycopg2.egg-info/PKG-INFO
  writing dependency_links to /tmp/pip-install-2d9wyu3k/psycopg2/pip-egg-info/psycopg2.egg-info/dependency_links.txt
  writing top-level names to /tmp/pip-install-2d9wyu3k/psycopg2/pip-egg-info/psycopg2.egg-info/top_level.txt
  writing manifest file '/tmp/pip-install-2d9wyu3k/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.

解决方案 For ubuntu

sudo apt-get install libpq-dev python3-dev

解决方案 For Fedora/Centos

yum install -y postgresql10
yum install postgresql-libs python3-devel postgresql-devel
yum install gcc

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