I have Python 3.7.0 installed, but for a specific Django project, I would like to use Python 3.6.5. Using pyenv for this purpose, on my Macbook Pro I ran brew install pyenv, followed by pyenv install 3.6.5 and, in the project's root directory, pyenv local 3.6.5. I've verified that Python version 3.6.5 is active:
Kurts-MacBook-Pro-2:lucy-web kurtpeek$ cat .python-version
3.6.5
Kurts-MacBook-Pro-2:lucy-web kurtpeek$ pyenv versions
system
* 3.6.5 (set by /Users/kurtpeek/Documents/dev/lucy2/lucy-web/.python-version)
The Pipfile I'm using is similar to the following:
[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"
[packages]
[dev-packages]
[requires]
python_version = "3.6.5"
However, when I run pipenv shell, I get that it 'defaults' to my system version, python 3.7.0:
Kurts-MacBook-Pro-2:lucy-web kurtpeek$ pipenv shell
Loading .env environment variables...
Warning: Your Pipfile requires python_version 3.6.5, but you are using 3.7.0 (/Users/k/.local/share/v/l/bin/python).
$ pipenv check will surely fail.
Launching subshell in virtual environment…
bash-3.2$ . /Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/bin/activate
(lucy-web-CVxkrCFK) bash-3.2$
Now, if I try to run python manage.py shell to run the Django project's shell, I get a SyntaxError which I suspect is germane to Python 3.7, since I'm sure this was working before:
(lucy-web-CVxkrCFK) bash-3.2$ python manage.py shell
Traceback (most recent call last):
File "manage.py", line 28, in <module>
execute_from_command_line(sys.argv)
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/django/core/management/__init__.py", line 338, in execute
django.setup()
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/django/__init__.py", line 27, in setup
apps.populate(settings.INSTALLED_APPS)
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/django/apps/registry.py", line 116, in populate
app_config.ready()
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/two_factor/apps.py", line 10, in ready
from .admin import patch_admin
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/two_factor/admin.py", line 2, in <module>
from django.contrib import admin
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/django/contrib/admin/__init__.py", line 4, in <module>
from django.contrib.admin.filters import (
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/django/contrib/admin/filters.py", line 10, in <module>
from django.contrib.admin.options import IncorrectLookupParameters
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/django/contrib/admin/options.py", line 12, in <module>
from django.contrib.admin import helpers, widgets
File "/Users/kurtpeek/.local/share/virtualenvs/lucy-web-CVxkrCFK/lib/python3.7/site-packages/django/contrib/admin/widgets.py", line 151
'%s=%s' % (k, v) for k, v in params.items(),
^
SyntaxError: Generator expression must be parenthesized
The root cause of this, however, I believe is that it is being run in Python 3.7.0 and not in Python 3.6.5 as desired.
Are pipenv and pyenv not 'compatible' with each other?
Pipenv is aware of Pyenv, but it doesn't automatically use the same Python version unless you tell it to do that. There is a note about this in the Pipenv docs.
You can either tell Pipenv to use a specific Python version, like
pipenv install --python 3.6.5
or you can set an environment variable to default to the Pyenv version, like
export PIPENV_PYTHON="$PYENV_ROOT/shims/python"