命令：pip3 install psycopg2
error：
Collecting psycopg2
Using cached psycopg2-2.9.1.tar.gz (379 kB)
ERROR: Command errored out with exit status 1:
command: /usr/local/bin/python3.9 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-wz20lo5h/psycopg2/setup.py'"'"'; __file__='"'"'/tmp/pip-install-wz20lo5h/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-pip-egg-info-nlj2yilc
cwd: /tmp/pip-install-wz20lo5h/psycopg2/
Complete output (23 lines):
running egg_info
creating /tmp/pip-pip-egg-info-nlj2yilc/psycopg2.egg-info
writing /tmp/pip-pip-egg-info-nlj2yilc/psycopg2.egg-info/PKG-INFO
writing dependency_links to /tmp/pip-pip-egg-info-nlj2yilc/psycopg2.egg-info/dependency_links.txt
writing top-level names to /tmp/pip-pip-egg-info-nlj2yilc/psycopg2.egg-info/top_level.txt
writing manifest file '/tmp/pip-pip-egg-info-nlj2yilc/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
<https://www.psycopg.org/docs/install.html>).
----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
WARNING: You are using pip version 20.2.3; however, version 21.2.3 is available.
You should consider upgrading via the '/usr/local/bin/python3.9 -m pip install --upgrade pip' command.
解决方案：
yum install postgresql-devel
