【Python】パッケージの依存関係を確認

1. pipdeptreeをインストール

   pip install pipdeptree
   

2. インストール済みのライブラリすべての依存関係をJSON形式で出力

   pipdeptree --json > out.txt
   

PyTorchの依存関係だとこんな感じ

    {
        "package": {
            "key": "torch",
            "package_name": "torch",
            "installed_version": "2.0.1+cu117"
        },
        "dependencies": [
            {
                "key": "filelock",
                "package_name": "filelock",
                "installed_version": "3.8.2",
                "required_version": null
            },
            {
                "key": "jinja2",
                "package_name": "Jinja2",
                "installed_version": "3.1.2",
                "required_version": null
            },
            {
                "key": "networkx",
                "package_name": "networkx",
                "installed_version": "3.0",
                "required_version": null
            },
            {
                "key": "sympy",
                "package_name": "sympy",
                "installed_version": "1.11.1",
                "required_version": null
            },
            {
                "key": "typing-extensions",
                "package_name": "typing-extensions",
                "installed_version": "4.4.0",
                "required_version": null
            }
        ]
    },

    {
        "package": {
            "key": "torchaudio",
            "package_name": "torchaudio",
            "installed_version": "2.0.2+cu117"
        },
        "dependencies": [
            {
                "key": "torch",
                "package_name": "torch",
                "installed_version": "2.0.1+cu117",
                "required_version": "==2.0.1"
            }
        ]
    },

    {
        "package": {
            "key": "torchvision",
            "package_name": "torchvision",
            "installed_version": "0.15.2+cu117"
        },
        "dependencies": [
            {
                "key": "numpy",
                "package_name": "numpy",
                "installed_version": "1.23.5",
                "required_version": null
            },
            {
                "key": "pillow",
                "package_name": "Pillow",
                "installed_version": "9.3.0",
                "required_version": ">=5.3.0,!=8.3.*"
            },
            {
                "key": "requests",
                "package_name": "requests",
                "installed_version": "2.28.1",
                "required_version": null
            },
            {
                "key": "torch",
                "package_name": "torch",
                "installed_version": "2.0.1+cu117",
                "required_version": "==2.0.1"
            }
        ]
    },