安裝python依賴包psycopg2來呼叫postgresql的操作
阿新 • • 發佈:2021-01-04
1、先安裝psycopg2的依賴元件
本案例的作業系統為linux red hat
在安裝python依賴包psycopg之前,你必須需要先安裝postgresql資料庫的相關元件:
postgresql-devel,postgresql,postgresql-libs這三個元件比較重要。另外,可選元件:postgresql-server
安裝上述元件之前,可以用命令來檢視你的系統現在是否已經安裝了相關元件:
[root@dthost27 ~]# rpm -qa | grep PostgreSQL
如果都沒有安裝,則可執行命令如下:
[root@dthost27 ~]# yum install postgresql-devel
(安裝過程中會順帶安裝上postgresql和postgresql-libs元件)
2、安裝psycopg2依賴包
保證依賴元件存在後,就可以使用pip命令安裝了:
[root@dthost27 ~]# pip install psycopg2-binary
注:這裡安裝的是binary格式的psycopg2依賴包,其實安裝psycopg2也可以,但是有時候執行pip install psycopg2會報錯,而安裝psycopg2-binary(編譯後)則不會
啟動python測試
import psycopg2
補充:安裝psycopg2報錯_解決方案
報錯資訊
(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.
解決方案 For ubuntu
sudo apt-get install libpq-dev python3-dev
解決方案 For Fedora/Centos
yum install -y postgresql10 yum install postgresql-libs python3-devel postgresql-devel yum install gcc
以上為個人經驗,希望能給大家一個參考,也希望大家多多支援我們。如有錯誤或未考慮完全的地方,望不吝賜教。