如何在Windows上的Python 3.9上安装psycopg2

Question

我一直在尝试安装psycopg2(pip install psycopg2(，但一直收到这个错误。

我也尝试过：pip install psycopg2-binary，但我得到了相同的错误。

这是错误消息：

ERROR: Command errored out with exit status 1:
command: 'c:usersviktorpycharmprojectswemportvenvscriptspython.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('"'"'rn'"'
"', '"'"'n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:UsersViktorAppDataLocalTemppip-pip-egg-info-3shb13sl'
cwd: C:UsersViktorAppDataLocalTemppip-install-015ceieipsycopg2
Complete output (23 lines):
running egg_info
creating C:UsersViktorAppDataLocalTemppip-pip-egg-info-3shb13slpsycopg2.egg-info
writing C:UsersViktorAppDataLocalTemppip-pip-egg-info-3shb13slpsycopg2.egg-infoPKG-INFO
writing dependency_links to C:UsersViktorAppDataLocalTemppip-pip-egg-info-3shb13slpsycopg2.egg-infodependency_links.txt
writing top-level names to C:UsersViktorAppDataLocalTemppip-pip-egg-info-3shb13slpsycopg2.egg-infotop_level.txt
writing manifest file 'C:UsersViktorAppDataLocalTemppip-pip-egg-info-3shb13slpsycopg2.egg-infoSOURCES.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.

如何解决？

Answer 1

下面将为windows安装预构建的二进制文件。它在3.9上对我有效。您可以在安装psycopg2后卸载pipwin。

pip install pipwin 
pipwin install psycopg2

安装psycopg2后可选：

pip uninstall pipwin

Answer 2

如果你使用linux

您需要确保安装车轮型号试试看sudo ./venv/bin/python -m pip install wheel

之后安装psycopg2和psycopg2-二进制

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

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