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Python環境構築チートシート

Last updated at Posted at 2023-07-26

pyコマンド

environment_py.py
# 起動バージョン確認1
> py --list-paths
Installed Pythons found by C:\Windows\py.exe Launcher for Windows
 -3.10-64       C:\Python310\python.exe *
 -3.7-64        C:\Python37\python.exe

# ※C:\Windows に py.ini を配置
# 起動バージョン確認2
> py --list-paths
Installed Pythons found by C:\Windows\py.exe Launcher for Windows
 -3.10-64       C:\Python310\python.exe
 -3.7-64        C:\Python37\python.exe *

# 仮想環境の作成
> py -3.10 -m venv wakasama

# 仮想環境の有効化
> .\wakasama\Scripts\activate
(wakasama) >

# 仮想環境の無効化
(wakasama) > deactivate
> 

# 仮想環境の削除 → wakasamaフォルダを消せばよい!!

# 仮想環境の構築
py -3.11 -m venv wakasama311
# 仮想環境の有効化
.\wakasama311\Scripts\activate
# パッケージインストール
python -m pip install --upgrade pip
pip install ipywidgets
---
from ipywidgets import IntProgress
IntProgress(50,max=100)
---
pip install ipywidgets-toggle-buttons
pip install numpy matplotlib
# うまく描画されないときは[Restart Kernel]


C:\wakasama\Python> py -3.11 -m venv wakasama311
.\wakasama311\Scripts\activate


pip install --no-index --find-links=./downloadFiles selenium
pip install --no-index --find-links=./downloadFiles flake8
pip install --no-index --find-links=./downloadFiles autopep8


pip download tzdata --dest pipPackage4 --verbose --log download4.log
pip download mypy --dest pipPackage5 --verbose --log download5.log

pip install pip-licenses

pip-licenses

py.ini
[defaults]
python=3.7

pipコマンド

environment_pip.py

# 初期インストール状態
> pip list
Package    Version
---------- -------
pip        22.2.2
setuptools 63.2.0

# ヘルプ表示
> pip help download
割愛(ヘルプ内容が表示)

# seleniumダウンロード(依存関係パッケージも含む)
> pip download selenium --dest pipPackage --verbose --log download.log

# パッケージ情報表示 ※ライセンスや依存関係パッケージ等
> pip show selenium

# 一括アンインストール
> pip freeze > uninstall.txt
> pip uninstall -y -r uninstall.txt

参考サイト

◆Pythonの複数バージョンの扱い方(Windowsの場合)
 https://gammasoft.jp/python/python-version-management/
◆py コマンドの規定 Python バージョンの設定方法
 https://itpc.blog.fc2.com/blog-entry-225.html
◆オフライン環境でPythonパッケージをpipインストール
 https://densan-hoshigumi.com/develop/python-pip-offline-install

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