无法在 macOS 10.13.6 上为 FastAPI 项目安装 psycopg2：python setup.py egg_info 未成功运行

Question

我尝试使用命令行安装psycopg2 ：

pip install psycopg2
这就是我得到的

  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error
  
  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [25 lines of output]
      /Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/setuptools/config/setupcfg.py:463: SetuptoolsDeprecationWarning: The license_file parameter is deprecated, use license_files instead.
        warnings.warn(msg, warning_class)
      running egg_info
      creating /private/var/folders/lx/rssnrrbj15jcz8pj88rr89f00000gn/T/pip-pip-egg-info-lpapm88u/psycopg2.egg-info
      writing /private/var/folders/lx/rssnrrbj15jcz8pj88rr89f00000gn/T/pip-pip-egg-info-lpapm88u/psycopg2.egg-info/PKG-INFO
      writing dependency_links to /private/var/folders/lx/rssnrrbj15jcz8pj88rr89f00000gn/T/pip-pip-egg-info-lpapm88u/psycopg2.egg-info/dependency_links.txt
      writing top-level names to /private/var/folders/lx/rssnrrbj15jcz8pj88rr89f00000gn/T/pip-pip-egg-info-lpapm88u/psycopg2.egg-info/top_level.txt
      writing manifest file '/private/var/folders/lx/rssnrrbj15jcz8pj88rr89f00000gn/T/pip-pip-egg-info-lpapm88u/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. 

然后我尝试从官方网站下载包并放入PATH：

/Users/t/PycharmProjects/API/venv/lib/python3.10/site-packages （我使用虚拟环境），但我得到No module named 'psycopg2'

Answer 1

在阅读了有关 Stackoverflow 的一些类似问题后，这里是对我有用的解决方案。

首先，安装Homebrew ，以防您尚未安装它

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

然后安装 postgresql ：

brew install postgresql

最后使用 pip 命令安装 psycpg2 ：

pip install psycopg2

Answer 2

sudo apt-get install libpq-dev

这对我有帮助