Raspberry Pi Tips

Setup Python virtual environment to Raspberry Pi

Raspberry Pi 3 Model B V1.2

  $ cat /etc/debian_version
  9.11

1: Download pyenv

  $ cd /tmp
  $ git clone  https://github.com/pyenv/pyenv.git ~/.pyenv
  Cloning into '/home/pi/.pyenv'...
  remote: Enumerating objects: 29, done.
  remote: Counting objects: 100% (29/29), done.
  remote: Compressing objects: 100% (23/23), done.
  remote: Total 17972 (delta 9), reused 9 (delta 3), pack-reused 17943
  Receiving objects: 100% (17972/17972), 3.55 MiB | 1.35 MiB/s, done.
  Resolving deltas: 100% (12236/12236), done.

2: Update pyenv

  $ git pull
  Already up-to-date.

3: Setup pyenv (to bash)

  $ echo 'export PYENV_ROOT="${HOME}/.pyenv"' >> ~/.bashrc
  $ echo 'if [ -d "${PYENV_ROOT}" ]; then' >> ~/.bashrc
  $ echo '    export PATH=${PYENV_ROOT}/bin:$PATH' >> ~/.bashrcpi@homepi:~/.pyenv $ echo '    eval "$(pyenv init -)"' >> ~/.bashrc
  $ echo 'fi' >> ~/.bashrc
  $ exec $SHELL -l

4: Check installable python version list on pyenv

  $ pyenv rehash 
  $ pyenv install -l

5: Install python 3.7.0 (the same version for pyupdi

  $ pyenv install 3.7.0
  Downloading Python-3.7.0.tar.xz...
  -> https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tar.xz
  Installing Python-3.7.0...
  Installed Python-3.7.0 to /home/pi/.pyenv/versions/3.7.0

This command takes 15 minutes for my RaspPi.

6: Switch python version at current directory

  $ cd ~/Arduino/build
  $ pyenv versions
  * system (set by /home/pi/.pyenv/version)
    3.7.0
  $ pyenv local 3.7.0
  $ pyenv versions
    system
  * 3.7.0 (set by /home/pi/Arduino/build/.python-version)


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