I've tried several ways to downgrade the python3, including using pyenv, but it has the build failed error. I think it's probably because my python3 is in my usr/bin folder and I can not delete it. For the course requirement, I really need to downgrade python to 3.5. Is there any way to do so?

CodePudding user response：

I recommend using Anaconda to install the specific python version. like it:

conda create -n py35 python=3.5

CodePudding user response：

First of all, install brew if is not already installed. Then add it to user path by:

export PATH=/opt/homebrew/bin:$PATH

Once done Restart your shell:

exec zsh -l

Now Check Python is located where:

which python

Next, Go through following steps:

1. Check if you have pyenv already installed on mac OS.

   pyenv --version -- Optional since you already stated that pyenv is present at your machine.

2. List all available version for python:

   pyenv install --list

3. Install desired python version:

   pyenv install 3.5

4. Set python 3.5 version globally:

   pyenv global 3.5

5. Check again if python is located whether in user's directory:

   which python

it should be pointing to your /Users/usrone/.pyenv/shims/python if not then set it again : pyenv global 3.5

6. Update your .zshrc

   if command -v pyenv 1>/dev/null 2>&1; then eval "$(pyenv init -)" fi PATH=$(pyenv root)/shims:$PATH

7. Restart zsh terminal:

   exec zsh -l

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