Ubuntu14.04下conda安装python3.6遇依赖冲突排查求助

Let’s walk through how to fix this dependency conflict between python=3.6 and ssl_match_hostname (which is requiring Python 2.7) step by step:

• First, verify your current environment and package state
  Run these commands to get a clearer picture of what’s installed:

  • conda info to check your active environment and conda version (old conda versions often struggle with dependency solving)
  • conda list ssl_match_hostname to confirm if this package is already present in your environment, and which version it is
  • If conda info ssl_match_hostname returns nothing, try conda search --info ssl_match_hostname instead—this will pull details about available versions across your configured channels, including their Python compatibility.

• Update conda first (critical for old systems like Ubuntu 14.04)
  Outdated conda versions are a common cause of unsolvable environment conflicts. Run this to update the base conda installation:

  conda update -n base conda
  

  Once updated, retry your original command: conda install python=3.6

• Try installing from the conda-forge channel
  The default conda channels might have an older version of ssl_match_hostname that only supports Python 2.7. Conda-forge typically maintains more up-to-date packages with broader Python compatibility. Run:

  conda install -c conda-forge python=3.6
  

• Remove conflicting packages manually (if safe)
  If ssl_match_hostname is installed and isn’t a critical dependency for your current environment, you can remove it first before installing Python 3.6:

  conda remove ssl_match_hostname
  conda install python=3.6
  

  After installing Python 3.6, you can reinstall a compatible version of ssl_match_hostname from conda-forge if needed:

  conda install -c conda-forge ssl_match_hostname
  

• Consider creating a fresh environment instead
  If modifying your existing environment is too messy, create a dedicated Python 3.6 environment:

  conda create -n py36_env python=3.6
  

  If you need this environment’s Python binary to live at ~/anaconda3/bin/python3.6, you can create a symlink from the environment’s Python to that path (just make sure to back up the original file first if it exists):

  ln -s ~/anaconda3/envs/py36_env/bin/python3.6 ~/anaconda3/bin/python3.6
  

• Check for system-level package interference
  Ubuntu 14.04 has older system libraries, so ensure you haven’t mixed conda packages with system-installed Python packages. Avoid using sudo with conda commands, as this can cause conflicts with system-level files.

内容的提问来源于stack exchange，提问作者Mittenchops