[root@edb ~]$ pip3 install psycopg2
Defaulting to user installation because normal site-packages is not writeable
Collecting psycopg2
Using cached psycopg2-2.9.3.tar.gz (380 kB)
Preparing metadata (setup.py) ... error
error: subprocess-exited-with-error
× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> [1 lines of output]
ERROR: Can not execute `setup.py` since setuptools is not available in the build environment.
[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.
安装其它包都可以，只有在安装psycopg2的时候报错，但是pip3 install psycopg2 在其它机器是没有问题的，就说明语句没有错误，报错截图忘记保存了，大概的意思就是不是pip的问题，是包的问题。
原因：
这台安装不上的机器，已经安装了PG数据库，可能是因为这个对psycopg2的包造成了影响，需要换个包安装：psycopg2-binary，这个包安装上，测试psycopg2也是正常的
[root@localhost ~]# pip3 install psycopg2-binary
Collecting psycopg2-binary
Obtaining dependency information for psycopg2-binary from https://files.pythonhosted.org/packages/bc/0d/486e3fa27f39a00168abfcf14a3d8444f437f4b755cc34316da1124f293d/psycopg2_binary-2.9.9-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata
Downloading psycopg2_binary-2.9.9-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (4.4 kB)
Downloading psycopg2_binary-2.9.9-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (3.0 MB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 3.0/3.0 MB 2.5 MB/s eta 0:00:00
Installing collected packages: psycopg2-binary
Successfully installed psycopg2-binary-2.9.9
[root@localhost ~]# python3
Python 3.10.4 (main, Oct 8 2023, 16:03:36) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import psycopg2
>>> exit()