无法使用 pip 安装 psycopg2 或 psycopg2-binary

Question

我通常使用macos，因为工作原因我才开始使用windows。尝试安装

psycopg2

但失败。还尝试安装

psycopg2-binary

，但也失败了。

当我输入

pip install psycopg2-binary

时，错误消息是这样的：

Collecting psycopg2-binary
  Using cached psycopg2-binary-2.9.10.tar.gz (385 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [5 lines of output]
      running egg_info
      writing psycopg2_binary.egg-info\PKG-INFO
      writing dependency_links to psycopg2_binary.egg-info\dependency_links.txt
      writing top-level names to psycopg2_binary.egg-info\top_level.txt
      error: [WinError 2] Sistem belirtilen dosyayı bulamıyor
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

我应该怎么做才能正确安装这个 hella lib？

Answer 1

“error: [WinError 2]”表示系统是windows。

psycopg2 是 libpq PostgreSQL 客户端库的 C 包装器。所以，你需要一个 C 编译器。

我建议安装 Microsoft C++ 构建工具。

还可以升级如下：

pip install --upgrade pip setuptools wheel

然后，再次尝试安装：

pip install psycopg2-binary

或

pip install psycopg2