How to setup a pipenv Python 3.6 project if OS Python version is 3.5?
Question:
My Ubuntu 16.04.03 is installed with Python 3.5.2. How do I setup pipenv to use Python 3.6 when my system does not have python 3.6?
$ pipenv --python 3.6
Warning: Python 3.6 was not found on your system…
You can specify specific versions of Python with:
$ pipenv --python path/to/python
Answers:
I don’t think you can do a virtualenv of a Python version you don’t have. What you can do is one of these options:
Install python 3.6 reference
Ubuntu 14.04 and 16.04
If you are using Ubuntu 14.04 or 16.04, you can use Felix Krull’s deadsnakes PPA at https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa:
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.6
Alternatively, you can use J Fernyhough’s PPA at https://launchpad.net/~jonathonf/+archive/ubuntu/python-3.6:
sudo add-apt-repository ppa:jonathonf/python-3.6
sudo apt-get update
sudo apt-get install python3.6
Ubuntu 16.10 and 17.04
If you are using Ubuntu 16.10 or 17.04, then Python 3.6 is in the universe repository, so you can just run:
sudo apt-get update
sudo apt-get install python3.6
Then create specific version python env
virtualenv -p python3.6 python36venv
Either manually write the version you need in your Pipfile:
[requires]
python_version = "3.6"
Or install it on your system. But I guess you will need the version to be installed if you plan to actually run pipenv install.
I would suggest to use pyenv: https://github.com/pyenv/pyenv.
Follow the installation instructions, then installing Python 3.6 is just a matter of
pyenv install 3.6.3
Then you can set the order of preference with
pyenv global system 3.6.3
Besides, if pyenv is available, pipenv will automatically use it to install the required version. From pipenv README:
Automatically install required Pythons, if pyenv is available.
Install ‘pyenv’ package by using brew install pyenv (if you don’t have it).
Install python 3.6 using pyenv install 3.6
Export new installed python version to PATH
export PATH=${PYENV_PYTHON_VERSIONS_HOME}/3.6/bin
Now in ‘Piplock’ specify the same version.
[requires]
python_version = "3.6"
Finally, run pipenv install --dev.
On MacOS, I have also used pyenv to manage python versions, similar to @pawamoy’s suggestion.
After installation I executed pipenv shell with the --python option pointing to the directory of the specific pyenv version. This will automatically generate a Pipfile with python_version = "3.6".
⇒ pipenv --python /Users/<Your User>/.pyenv/versions/3.6.3/bin/python3.6 shell
On MacOS (latest version BigSur and Monterey), downloading a version of python from pyenv throws some error while building. So I would suggest to simply download the python installer of that version (3.6 in your case) from the official site. Then use the command
pipenv install --python 3.6
PS: One of the rare moments where not using command line can save you a bit of time and frustration.
My Ubuntu 16.04.03 is installed with Python 3.5.2. How do I setup pipenv to use Python 3.6 when my system does not have python 3.6?
$ pipenv --python 3.6
Warning: Python 3.6 was not found on your system…
You can specify specific versions of Python with:
$ pipenv --python path/to/python
I don’t think you can do a virtualenv of a Python version you don’t have. What you can do is one of these options:
Install python 3.6 reference
Ubuntu 14.04 and 16.04
If you are using Ubuntu 14.04 or 16.04, you can use Felix Krull’s deadsnakes PPA at https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa:
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.6
Alternatively, you can use J Fernyhough’s PPA at https://launchpad.net/~jonathonf/+archive/ubuntu/python-3.6:
sudo add-apt-repository ppa:jonathonf/python-3.6
sudo apt-get update
sudo apt-get install python3.6
Ubuntu 16.10 and 17.04
If you are using Ubuntu 16.10 or 17.04, then Python 3.6 is in the universe repository, so you can just run:
sudo apt-get update
sudo apt-get install python3.6
Then create specific version python env
virtualenv -p python3.6 python36venv
Either manually write the version you need in your Pipfile:
[requires]
python_version = "3.6"
Or install it on your system. But I guess you will need the version to be installed if you plan to actually run pipenv install.
I would suggest to use pyenv: https://github.com/pyenv/pyenv.
Follow the installation instructions, then installing Python 3.6 is just a matter of
pyenv install 3.6.3
Then you can set the order of preference with
pyenv global system 3.6.3
Besides, if pyenv is available, pipenv will automatically use it to install the required version. From pipenv README:
Automatically install required Pythons, if pyenv is available.
Install ‘pyenv’ package by using brew install pyenv (if you don’t have it).
Install python 3.6 using pyenv install 3.6
Export new installed python version to PATH
export PATH=${PYENV_PYTHON_VERSIONS_HOME}/3.6/bin
Now in ‘Piplock’ specify the same version.
[requires]
python_version = "3.6"
Finally, run pipenv install --dev.
On MacOS, I have also used pyenv to manage python versions, similar to @pawamoy’s suggestion.
After installation I executed pipenv shell with the --python option pointing to the directory of the specific pyenv version. This will automatically generate a Pipfile with python_version = "3.6".
⇒ pipenv --python /Users/<Your User>/.pyenv/versions/3.6.3/bin/python3.6 shell
On MacOS (latest version BigSur and Monterey), downloading a version of python from pyenv throws some error while building. So I would suggest to simply download the python installer of that version (3.6 in your case) from the official site. Then use the command
pipenv install --python 3.6
PS: One of the rare moments where not using command line can save you a bit of time and frustration.