前提・実現したいこと
mkdocsをインストールして使いたいです。インストールの段階ではエラーは出ていないのですが、mkdocsのコマンドが使えません。
発生している問題・エラーメッセージ
% python3 -m pip install mkdocs Defaulting to user installation because normal site-packages is not writeable Requirement already satisfied: mkdocs in ./Library/Python/3.7/lib/python/site-packages (1.1.2) Requirement already satisfied: click>=3.3 in ./Library/Python/3.7/lib/python/site-packages (from mkdocs) (7.1.2) Requirement already satisfied: PyYAML>=3.10 in ./Library/Python/3.7/lib/python/site-packages (from mkdocs) (5.3.1) Requirement already satisfied: Jinja2>=2.10.1 in /Library/Python/3.7/site-packages (from mkdocs) (2.11.2) Requirement already satisfied: lunr[languages]==0.5.8 in ./Library/Python/3.7/lib/python/site-packages (from mkdocs) (0.5.8) Requirement already satisfied: livereload>=2.5.1 in ./Library/Python/3.7/lib/python/site-packages (from mkdocs) (2.6.3) Requirement already satisfied: Markdown>=3.2.1 in ./Library/Python/3.7/lib/python/site-packages (from mkdocs) (3.2.1) Requirement already satisfied: tornado>=5.0 in /Library/Python/3.7/site-packages (from mkdocs) (6.0.4) Requirement already satisfied: six>=1.11.0 in /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/site-packages (from lunr[languages]==0.5.8->mkdocs) (1.12.0) Requirement already satisfied: future>=0.16.0 in ./Library/Python/3.7/lib/python/site-packages (from lunr[languages]==0.5.8->mkdocs) (0.18.2) Requirement already satisfied: nltk>=3.2.5 in ./Library/Python/3.7/lib/python/site-packages (from lunr[languages]==0.5.8->mkdocs) (3.5) Requirement already satisfied: MarkupSafe>=0.23 in /Library/Python/3.7/site-packages (from Jinja2>=2.10.1->mkdocs) (1.1.1) Requirement already satisfied: setuptools>=36 in ./Library/Python/3.7/lib/python/site-packages (from Markdown>=3.2.1->mkdocs) (46.1.3) Requirement already satisfied: joblib in ./Library/Python/3.7/lib/python/site-packages (from nltk>=3.2.5->lunr[languages]==0.5.8->mkdocs) (0.16.0) Requirement already satisfied: tqdm in ./Library/Python/3.7/lib/python/site-packages (from nltk>=3.2.5->lunr[languages]==0.5.8->mkdocs) (4.51.0) Requirement already satisfied: regex in ./Library/Python/3.7/lib/python/site-packages (from nltk>=3.2.5->lunr[languages]==0.5.8->mkdocs) (2020.10.28) % mkdocs --version zsh: command not found: mkdocs
補足情報(FW/ツールのバージョンなど)
・macOS Big Sur
バージョン 11.2.1
・python 3.7.3(デフォルトではpython 2.7.16)
・pipコマンドについて、上記では「pip3 install」を使っているが、普段はWARNINGの内容に従って「python3 -m pip install」を使っている。これが問題なのでは?と思い「pip3 install」にしたが、WARNINGが表示されるようになっただけでその他のメッセージは変わらなかった。
試したこと
・ターミナルのデフォルトのpythonが2系だったのを3系に直して「pip3 install mkdocs」を試した。
% alias python=/usr/bin/python3 % alias pip=/usr/bin/pip3
結果は下のように、「python3 -m pip install」使えというWARNINGが表示されるようになったが、その後のメッセージは変わらなかった。
% pip3 install mkdocs WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip. Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue. To avoid this problem you can invoke Python with '-m pip' instead of running pip directly. Defaulting to user installation because normal site-packages is not writeable Requirement already satisfied: mkdocs in ./Library/Python/3.7/lib/python/site-packages (1.1.2) ...(以下、「発生している問題」と同じメッセージになる)

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