如何在 Windows 上的 Python 3.9 上安装 psycopg2？

Question

I have been trying to install psycopg2 ( pip install psycopg2 ), but I keep getting this error.

I have also tried with: pip install psycopg2-binary but I'm getting the same error .

Here is the error message:

    ERROR: Command errored out with exit status 1:
     command: 'c:\users\viktor\pycharmprojects\wemport\venv\scripts\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\Viktor\\AppData\\Local\\Temp\\pip-install-015ceiei\\psycop
g2\\setup.py'"'"'; __file__='"'"'C:\\Users\\Viktor\\AppData\\Local\\Temp\\pip-install-015ceiei\\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 'C:\Users\Viktor\AppData\Local\Temp\pip-pip-egg-info-3shb13sl'
         cwd: C:\Users\Viktor\AppData\Local\Temp\pip-install-015ceiei\psycopg2\
    Complete output (23 lines):
    running egg_info
    creating C:\Users\Viktor\AppData\Local\Temp\pip-pip-egg-info-3shb13sl\psycopg2.egg-info
    writing C:\Users\Viktor\AppData\Local\Temp\pip-pip-egg-info-3shb13sl\psycopg2.egg-info\PKG-INFO
    writing dependency_links to C:\Users\Viktor\AppData\Local\Temp\pip-pip-egg-info-3shb13sl\psycopg2.egg-info\dependency_links.txt
    writing top-level names to C:\Users\Viktor\AppData\Local\Temp\pip-pip-egg-info-3shb13sl\psycopg2.egg-info\top_level.txt
    writing manifest file 'C:\Users\Viktor\AppData\Local\Temp\pip-pip-egg-info-3shb13sl\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.

How to fix that?

Answer 1

The following will install prebuilt binaries for windows. It's worked for me on 3.9. You can uninstall pipwin after install psycopg2.

pip install pipwin 
pipwin install psycopg2

Optional after psycopg2 installed:

pip uninstall pipwin

Answer 2

if u use linux

You need to make sure that you install wheel model and Try that sudo ./venv/bin/python -m pip install wheel

after that install psycopg2 and psycopg2-binary

sudo ./venv/bin/python -m pip install psycopg2

sudo ./venv/bin/python -m pip install psycopg-binary