无法在 Fedora 39 中找到 pg_config 来安装 psycopg2

Question

我使用的是 Fedora 39 并安装了 PostgreSQL 15.4。现在我正在尝试从 python 连接到它。我无法做到这一点，因为 psycopg2 需要在 $PATH 变量中设置 pg_config 路径。我一开始就找不到它来设置路径。我已经安装了

python3-devel-3.12.1-2.fc39.x86_64

，并听取了帖子 Post_1 和 Post_2 的建议，但问题仍然存在。

which 命令返回以下内容：

thermite@fedora39:~$ which pg_config
/usr/bin/which: no pg_config in (.....<All the path variable entries>.....)
thermite@fedora39:~$ pip install psycopg2
Defaulting to user installation because normal site-packages is not writeable
Collecting psycopg2
  Using cached psycopg2-2.9.9.tar.gz (384 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
  ╰─> [21 lines of output]
      running egg_info
      writing psycopg2.egg-info/PKG-INFO
      writing dependency_links to psycopg2.egg-info/dependency_links.txt
      writing top-level names to psycopg2.egg-info/top_level.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: 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.

然后我试图找到pg_config所在的位置但没有找到 我已按照此处的说明安装了 PostgreSQL。

我找到的安装目录如下（其中都不包含pg_config文件）

/var/lib/pgsql
/usr/bin/psql

其他详情

thermite@fedora39:~$ postgres --version
postgres (PostgreSQL) 15.4
thermite@fedora39:~$ sudo dnf install libpq
[sudo] password for thermite: 
asbru-cm-release                                 429  B/s | 488  B     00:01    
asbru-cm-release-noarch                          400  B/s | 488  B     00:01    
asbru-cm-release-source                          401  B/s | 488  B     00:01    
Fedora 39 - x86_64 - Updates                     4.3 kB/s | 5.4 kB     00:01    
Package libpq5-16.0-42PGDG.f39.x86_64 is already installed.
Dependencies resolved.
Nothing to do.
Complete!
thermite@fedora39:~$ sudo dnf install libpq-devel
Last metadata expiration check: 0:00:14 ago on Tuesday 13 February 2024 08:09:00 AM.
Error: 
 Problem: package libpq-devel-15.3-1.fc39.i686 from fedora requires libpq(x86-32) = 15.3-1.fc39, but none of the providers can be installed
  - conflicting requests
  - libpq-15.3-1.fc39.i686 from fedora  does not belong to a distupgrade repository
  - package libpq-devel-15.3-1.fc39.x86_64 from fedora requires libpq(x86-64) = 15.3-1.fc39, but none of the providers can be installed
  - problem with installed package libpq5-16.0-42PGDG.f39.x86_64
  - installed package libpq5-16.0-42PGDG.f39.x86_64 obsoletes libpq provided by libpq-15.3-1.fc39.x86_64 from fedora
  - package libpq5-16.0-42PGDG.f39.x86_64 from pgAdmin4 obsoletes libpq provided by libpq-15.3-1.fc39.x86_64 from fedora
(try to add '--skip-broken' to skip uninstallable packages)

请有人帮我解决这个问题。

Answer 1

您必须安装开发包：

dnf install postgresql15-devel

然后将 PostgreSQL 二进制目录放在你的

PATH

:

export PATH=/usr/pgsql-15/bin:$PATH

现在你已经准备好了。