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Embeddable Python環境にfutureライブラリをインストールする.

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背景

Embeddable Python環境でline-bot-sdkライブラリを利用したかった.
しかし,pip install時に,依存するfutureライブラリのインストールでエラーが出た.
なお,本記事執筆時点でのfutureライブラリのバージョンは0.18.3である.

インストール失敗.log
PS C:\Users\hoge\Downloads\python-3.11.2-embed-amd64> ./python -m pip install future
Collecting future
  Using cached future-0.18.3.tar.gz (840 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [6 lines of output]
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 34, in <module>
        File "C:\Users\hoge\AppData\Local\Temp\pip-install-ooax0jzt\future_4f17c5ec60354cc08d4df73197500084\setup.py", line 86, in <module>
          import src.future
      ModuleNotFoundError: No module named 'src'
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

できたこと

Embeddable Python環境に,futureライブラリ(と,line-bot-sdk)をインストールした.

やったこと

futureライブラリの「setup.py」ファイルに,「sys.path.append("")」と記載した行を追記する.

setup_追記後抜粋.py
#!/usr/bin/env python

from __future__ import absolute_import, print_function

import os
import os.path
import sys

sys.path.append("")  # ←この行を追記した.

try:
    from setuptools import setup
except ImportError:
    from distutils.core import setup

具体的な手順

  1. PyPIより該当のインストーラをダウンロードする.
  2. 7-Zip等を利用して解凍する.
  3. 適当なテキストエディタでsetup.pyファイルを開き,上記一行を追記する.
  4. ZIPファイルに固め,当該ZIPファイルを指定してpip installする.
インストール成功.log
PS C:\Users\hoge\Downloads\python-3.11.2-embed-amd64> ./python -m pip install ./future-0.18.3.zip
Processing c:\users\hoge\downloads\python-3.11.2-embed-amd64\future-0.18.3.zip
  Preparing metadata (setup.py) ... done
Building wheels for collected packages: future
  Building wheel for future (setup.py) ... done
  Created wheel for future: filename=future-0.18.3-py3-none-any.whl size=492053 sha256=46bd2748826e7eea027eef3bebffb5a3ee23ac940bacba86b85d728cf5895917
  Stored in directory: c:\users\hoge\appdata\local\pip\cache\wheels\5f\f7\ed\dd1ed5930a7bed1e192e75511b90568f6f49717e6d5b24ad7b
Successfully built future
Installing collected packages: future
  WARNING: The scripts futurize.exe and pasteurize.exe are installed in 'C:\Users\hoge\Downloads\python-3.11.2-embed-amd64\Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed future-0.18.3

原因考察

「python.exe」の存在する場所にパスが通っていないのが直接的な原因か?
環境変数をあまりいじりたくないので,Embeddable Pythonをパスを通さずに利用していた.
(わざわざEmbeddable Pythonを使う人,そういう人多そう.)
(理解が間違っていたらコメント欄で教えてください.)

参考文献

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