python_installation_win10.md

Windows Python3 インストールメモ

手順

1. executable installer 3.10.2 を実行
2. 設定は下記の通り
   • Optional Features
     • Documentation
     • pip
     • tcl/tk and IDLE
     • Python test suite
     • py launcher
   • Advanced Options
     • Install for all users
     • Associate files with python (requires the py launcher)
     • Creates shortcuts for installed applications
     • Add Python to environment variables
     • Precompile standard library
     • Download debugging symbols
     • Download debug binaries
     • Customize install location C:\Data\Python\Python310\
   • Setup was successful
     • 実行: Disable path length limit Changes your machine configuration to allow programs, including Python, to bypass the 260 character "MAX_PATH" limitation.
3. PATH の確認

   # PowerShell
   Get-WmiObject Win32_Environment | 
     ?{ $_.Name -eq 'Path' } |
     %{ $_.VariableValue = ($_.VariableValue -replace ";","`n"); $_ } | 
     Format-List Name,UserName,VariableValue

   Name          : Path
   UserName      : <SYSTEM>
   VariableValue : %SystemRoot%\system32
                   %SystemRoot%
                   %SystemRoot%\System32\Wbem
                   %SYSTEMROOT%\System32\WindowsPowerShell\v1.0\
                   %SYSTEMROOT%\System32\OpenSSH\
   
   Name          : Path
   UserName      : NT AUTHORITY\SYSTEM
   VariableValue : %USERPROFILE%\AppData\Local\Microsoft\WindowsApps
   
   
   Name          : Path
   UserName      : DESKTOP-WIN-02\admin
   VariableValue : C:\Data\Python\Python310\Scripts\
                   C:\Data\Python\Python310\
                   C:\Users\admin\AppData\Local\Programs\Python\Launcher\
                   %USERPROFILE%\AppData\Local\Microsoft\WindowsApps
   

4. pip PATH 確認

   # PowerShell
   (Get-Command pip).Path

   C:\Data\Python\Python310\Scripts\pip.exe
   

5. pip 更新

   pip install -U pip

6. wheel インストール

   pip install wheel

7. pip 以外のモジュールの一括更新

   # PowerShell
   pip install --upgrade (@(pip list --format freeze --exclude pip) | %{$_ -Replace '==.*$',''})

メモ

pip 以外のモジュールの一括更新

• PowerShell から下記の様に実行する
• pip list --outdated のほうが良いと思っていたが、依存関係解決のためには全モジュールを指定したほうが良さそう

pip install --upgrade (@(pip list --format freeze --exclude pip) | %{$_ -Replace '==.*$',''})

プロキシ環境下の場合

• 環境変数 http_proxy https_proxy に http://<proxy server>:<port> の形で設定する
• pip だけのプロキシ設定の場合は %APPDATA%\pip\pip.ini に下記のように設定する

  [global]
  proxy = http://<proxy server>:<port>

モジュールの一括更新は --outdated をつけないほうが良さそう

PS> pip install --upgrade (@(pip list --outdated --format freeze --exclude pip) | %{$_ -Replace '==.*$',''})

Requirement already satisfied: mistune in c:\data\python\python310\lib\site-packages (0.8.4)
Collecting mistune
  Using cached mistune-2.0.2-py2.py3-none-any.whl (24 kB)
Installing collected packages: mistune
  Attempting uninstall: mistune
    Found existing installation: mistune 0.8.4
    Uninstalling mistune-0.8.4:
      Successfully uninstalled mistune-0.8.4
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
nbconvert 6.4.1 requires mistune<2,>=0.8.1, but you have mistune 2.0.2 which is incompatible.