python安装psycopg2 报错 ERROR: Command errored out with exit status 1

使用pip install psycopg2 报错如下：
Collecting psycopg2
Downloading https://pypi.tuna.tsinghua.edu.cn/packages/84/d7/6a93c99b5ba4d4d22daa3928b983cec66df4536ca50b22ce5dcac65e4e71/psycopg2-2.8.4.tar.gz (377kB)
|████████████████████████████████| 378kB 41.4MB/s
ERROR: Command errored out with exit status 1:
command: /usr/bin/python2 -c ‘import sys, setuptools, tokenize; sys.argv[0] = ‘"’"’/tmp/pip-install-YZ7EqO/psycopg2/setup.py’"’"’; file=’"’"’/tmp/pip-install-YZ7EqO/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 pip-egg-info
cwd: /tmp/pip-install-YZ7EqO/psycopg2/
Complete output (27 lines):
/usr/lib64/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: ‘project_urls’
warnings.warn(msg)
/usr/lib64/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: ‘python_requires’
warnings.warn(msg)
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’

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
).

----------------------------------------

ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

解决方法：
先安装postgresql-devel*
yum install postgresql-devel*
再用pip安装psycopg2 解决问题