Preparing metadata (setup.py) … error
error: subprocess-exited-with-error
× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> [23 lines of output]
running egg_info
creating /tmp/pip-pip-egg-info-ho8nab5x/psycopg2.egg-info
writing /tmp/pip-pip-egg-info-ho8nab5x/psycopg2.egg-info/PKG-INFO
writing dependency_links to /tmp/pip-pip-egg-info-ho8nab5x/psycopg2.egg-info/dependency_links.txt
writing top-level names to /tmp/pip-pip-egg-info-ho8nab5x/psycopg2.egg-info/top_level.txt
writing manifest file ‘/tmp/pip-pip-egg-info-ho8nab5x/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>).
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
你现在报错信息是安装 psycopg2 时出现的：
Error: pg_config executable not found.
解释
psycopg2 是 PostgreSQL 的 Python 驱动
它需要在安装时编译 C 扩展
编译需要 PostgreSQL 的开发库，尤其是 pg_config 工具
你当前系统没有安装 PostgreSQL 开发包，所以编译失败
方案
安装二进制包（无需编译）
pip install psycopg2-binary