ubuntu上安装了多个gunicorn出现版本冲突，不知如何解决

Question

问题描述

ubuntu上安装了多个gunicorn出现版本冲突，自己之前pip3 install gunicorn过，又easy install过。。。就是乱装打，现在出现VersionConflict不知道如何处理。

问题出现的平台版本及自己尝试过哪些方法

remove和easy install -m过

你期待的结果是什么？实际看到的错误信息又是什么？

在终端输入gonicorn报错如下：

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 635, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 943, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 834, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (gunicorn 19.9.0 (/home/rex/下载/gunicorn), Requirement.parse('gunicorn==19.4.5'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/gunicorn", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2927, in <module>
    @_call_aside
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2913, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2940, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 637, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 650, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 829, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'gunicorn==19.4.5' distribution was not found and is required by the application

Answer 1

pkg_resources.VersionConflict: (gunicorn 19.9.0 (/home/rex/下载/gunicorn), Requirement.parse('gunicorn==19.4.5'))

pkg_resources.DistributionNotFound: The 'gunicorn==19.4.5' distribution was not found and is required by the application

你的错误信息里的这2句比较关键，意思是说你现在找到的是gunicorn19.9.0，而你在项目里声明使用的是19.4.5版本的。所以最容易的解决方案是想办法修改项目里使用的版本号为19.9.0即可