I am trying to set up an environment using pyenv and homebrew on Ubuntu 20.04. There are no problems with my system install of python. However, when I install a specific version of python using pyenv I run into the following problem upon running Jupyter:
> jupyter notebook
Traceback (most recent call last):
File "/home/parzydlo/.pyenv/versions/3.10.3/bin/jupyter-notebook", line 5, in <module>
from notebook.notebookapp import main
File "/home/parzydlo/.pyenv/versions/3.10.3/lib/python3.10/site-packages/notebook/notebookapp.py", line 76, in <module>
from .base.handlers import Template404, RedirectWithParams
File "/home/parzydlo/.pyenv/versions/3.10.3/lib/python3.10/site-packages/notebook/base/handlers.py", line 35, in <module>
from notebook.utils import is_hidden, url_path_join, url_is_absolute, url_escape, urldecode_unix_socket_path
File "/home/parzydlo/.pyenv/versions/3.10.3/lib/python3.10/site-packages/notebook/utils.py", line 8, in <module>
import ctypes
File "/home/parzydlo/.pyenv/versions/3.10.3/lib/python3.10/ctypes/__init__.py", line 8, in <module>
from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'
To verify the package is missing:
> python3
Python 3.10.3 (main, Apr 7 2022, 19:51:28) [GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ctypes
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/parzydlo/.pyenv/versions/3.10.3/lib/python3.10/ctypes/__init__.py", line 8, in <module>
from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'
When I switch back to system python:
> pyenv local system
> python3
Python 3.9.12 (main, Mar 23 2022, 21:36:19)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ctypes
>>>
Following numerous threads here on SO I installed libffi-dev and tried reinstalling pyenv python but the problem persists. Perhaps it is worth mentioning that I'm using homebrew as my package manager, but had to install libffi-dev using apt.
Finally, I read [this post on dev.to][1] which suggested the following fix:
CC="$(brew --prefix gcc)/bin/gcc-11" \
pyenv install --verbose 3.10.0
Unfortunately, this too did not resolve the issue. [1]: https://dev.to/ajkerrigan/homebrew-pyenv-ctypes-oh-my-3d9#isolating-the-useful-change
