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WSL2にpyenv + poetryでpython3.10の環境を作る

Last updated at Posted at 2023-11-14

やりたいことと問題

デフォルトのpythonは3.8だった。type hintが強化されているpython 3.11, 3.10を使いたい。
個人的にはpyenvでpythonバージョン管理をして、poetryでパッケージ管理をするのに慣れているのでそうする。

ところが、普通に入れようとするとちょっと詰まるのでメモ

pyenvをいれる

公式のサイトや、インストーラーのサイト通りに、下記で入れる

curl https://pyenv.run | bash

なぜか.pyenvディレクトリがいたので削除。

pyenv経由でpython3.10を入れる

pyenv install 3.10

これで入ると思いきや、下記のようにbz2やらtkinterやらsqlite3やらがないと言って怒られる。

MERIK@DESKTOP:~$ pyenv install 3.10
pyenv: /home/MERIK/.pyenv/versions/3.10.13 already exists
continue with installation? (y/N) y
Downloading Python-3.10.13.tar.xz...
-> https://www.python.org/ftp/python/3.10.13/Python-3.10.13.tar.xz
Installing Python-3.10.13...
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/MERIK/.pyenv/versions/3.10.13/lib/python3.10/bz2.py", line 17, in <module>
    from _bz2 import BZ2Compressor, BZ2Decompressor
ModuleNotFoundError: No module named '_bz2'
WARNING: The Python bz2 extension was not compiled. Missing the bzip2 lib?
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/MERIK/.pyenv/versions/3.10.13/lib/python3.10/curses/__init__.py", line 13, in <module>
    from _curses import *
ModuleNotFoundError: No module named '_curses'
WARNING: The Python curses extension was not compiled. Missing the ncurses lib?
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'readline'
WARNING: The Python readline extension was not compiled. Missing the GNU readline lib?
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/MERIK/.pyenv/versions/3.10.13/lib/python3.10/sqlite3/__init__.py", line 57, in <module>
    from sqlite3.dbapi2 import *
  File "/home/MERIK/.pyenv/versions/3.10.13/lib/python3.10/sqlite3/dbapi2.py", line 27, in <module>
    from _sqlite3 import *
ModuleNotFoundError: No module named '_sqlite3'
WARNING: The Python sqlite3 extension was not compiled. Missing the SQLite3 lib?
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/MERIK/.pyenv/versions/3.10.13/lib/python3.10/tkinter/__init__.py", line 37, in <module>
    import _tkinter # If this fails your Python may not be configured for Tk
ModuleNotFoundError: No module named '_tkinter'
WARNING: The Python tkinter extension was not compiled and GUI subsystem has been detected. Missing the Tk toolkit?
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/MERIK/.pyenv/versions/3.10.13/lib/python3.10/lzma.py", line 27, in <module>
    from _lzma import *
ModuleNotFoundError: No module named '_lzma'
WARNING: The Python lzma extension was not compiled. Missing the lzma lib?
Installed Python-3.10.13 to /home/MERIK/.pyenv/versions/3.10.13

ググると先人の知恵を見つけることができ、下記のようにして必要なライブラリをいれたらpython3.10が入るようになった。

sudo apt-get install build-essential zlib1g-dev libffi-dev libssl-dev libbz2-dev libreadline-dev libsqlite3-dev liblzma-dev
sudo apt-get install python-tk python3-tk tk-dev
pyenv install 3.10

pyenvでいれたpython 3.10でpoetryを使う

当面はpython 3.10が使えればいいので、python 3.10をglobalにしてpoetryをインストールする

poetryをいれるまえに、pyenvがきちんと入ったかを確認しておく。
ちゃんと、python で python 3.10が起動するようになったことを下記で確認。

MERIK@DESKTOP:~$ pyenv global 3.10
MERIK@DESKTOP:~$ python
Python 3.10.13 (main, Nov 14 2023, 21:11:31) [GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

大丈夫そうなので、poetryの公式サイトを参考に、少し書き換えて下記のようにしていれる

curl -sSL https://install.python-poetry.org | python -

動作確認

MERIK@DESKTOP:~$ poetry -V
Poetry (version 1.7.0)

ちゃんと入っている。

poetry initで適当にpyproject.tomlを作ると、きちんとcompatible python versionsが^3.10で生成される。

MERIK@DESKTOP ~$ poetry init

This command will guide you through creating your pyproject.toml config.

Package name [nice_package]:  
Version [0.1.0]:  
Description []:  
Author [None, n to skip]:  n
License []:  
Compatible Python versions [^3.10]:  

Would you like to define your main dependencies interactively? (yes/no) [yes] no
Would you like to define your development dependencies interactively? (yes/no) [yes] no
Generated file

[tool.poetry]
name = "nice_package"
version = "0.1.0"
description = ""
authors = ["Your Name <you@example.com>"]
readme = "README.md"

[tool.poetry.dependencies]
python = "^3.10"


[build-system]
requires = ["poetry-core"]
build-backend = "poetry.core.masonry.api"

あとがき

5年前もWSLの記事を書いていました…。
あの頃よりはだいぶコード書けるようになった…はず。

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