在 windows 上的 vscode 中安装 psycopg2 时出错

Question

我正在尝试pip install psycopg2 ，这会导致以下错误。

ERROR: Command errored out with exit status 1:
   command: 'c:\users\rock\envs\demo\scripts\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\rock\\AppData\\Local\\Temp\\pip-install-fczxt3cu\\psycopg2\\setup.py'"'"'; __file__='"'"'C:\\Users\\rock\\AppData\\Local\\Temp\\pip-install-fczxt3cu\\psycopg2\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d 'C:\Users\rock\AppData\Local\Temp\pip-wheel-i_fkxw14' --python-tag cp38
       cwd: C:\Users\rock\AppData\Local\Temp\pip-install-fczxt3cu\psycopg2\
  Complete output (22 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build\lib.win-amd64-3.8
  creating build\lib.win-amd64-3.8\psycopg2
  copying lib\compat.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\errorcodes.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\errors.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\extensions.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\extras.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\pool.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\sql.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\tz.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\_ipaddress.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\_json.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\_lru_cache.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\_range.py -> build\lib.win-amd64-3.8\psycopg2
  copying lib\__init__.py -> build\lib.win-amd64-3.8\psycopg2
  running build_ext
  building 'psycopg2._psycopg' extension
  error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/

Answer 1

解决方案在错误消息中。 您需要安装 Visual C++ 运行时。 Go 至

https://support.microsoft.com/en-gb/help/2977003/the-latest-supported-visual-c-downloads

并下载适合您系统的版本，然后安装并重试。

编辑：正确答案

在这种情况下，错误消息具有误导性。 这是 psycopg 的问题，它似乎还不支持 Windows 上的 Python 3.8。 解决方案是使用 3.7 直到 psycopg 准备好。

https://github.com/psycopg/psycopg2/issues/990