centos7.6安装psycopg2

如果有下面的异常信息，则先安装postgresql-devel*

yum install postgresql-devel*

再安装

pip3 install psycopg2

异常：

Collecting psycopg2Using cached psycopg2-2.8.6.tar.gz (383 kB)ERROR: Command errored out with exit status 1:command: /usr/local/python3/bin/python3.8 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-cccqzv8r/psycopg2_106c8876db424e0f88677f9a7c8e1a77/setup.py'"'"'; __file__='"'"'/tmp/pip-install-cccqzv8r/psycopg2_106c8876db424e0f88677f9a7c8e1a77/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-pip-egg-info-kml0fc5pcwd: /tmp/pip-install-cccqzv8r/psycopg2_106c8876db424e0f88677f9a7c8e1a77/Complete output (23 lines):running egg_infocreating /tmp/pip-pip-egg-info-kml0fc5p/psycopg2.egg-infowriting /tmp/pip-pip-egg-info-kml0fc5p/psycopg2.egg-info/PKG-INFOwriting dependency_links to /tmp/pip-pip-egg-info-kml0fc5p/psycopg2.egg-info/dependency_links.txtwriting top-level names to /tmp/pip-pip-egg-info-kml0fc5p/psycopg2.egg-info/top_level.txtwriting manifest file '/tmp/pip-pip-egg-info-kml0fc5p/psycopg2.egg-info/SOURCES.txt'Error: pg_config executable not found.pg_config is required to build psycopg2 from source.  Please add the directorycontaining pg_config to the $PATH or specify the full executable path with theoption: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<https://www.psycopg.org/docs/install.html>).----------------------------------------

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