Некоторая информация:
Код: Выделить всё
(base) MacBook-Pro-8:~ mona$ python --version
Python 3.7.4
(base) MacBook-Pro-8:~ mona$ which python
/Users/mona/opt/anaconda3/bin/python
(base) MacBook-Pro-8:~ mona$ pip --version
pip 19.2.3 from /Users/mona/opt/anaconda3/lib/python3.7/site-packages/pip (python 3.7)
(base) MacBook-Pro-8:~ mona$ which pip
/Users/mona/opt/anaconda3/bin/pip
(base) MacBook-Pro-8:~ mona$ pip3 --version
-bash: pip3: command not found
(base) MacBook-Pro-8:~ mona$ locate pip3
/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/python/py-pip/files/pip33
/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/python/py-pip/files/pip34
/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/python/py-pip/files/pip35

Ниже приведены некоторые похожие вопросы, которые я уже читал:
- pip3: команда не найдена, но python3-pip уже установлен
- python3-pip установлен, но команда pip3 не найдена?
- https://superuser.com/questions/769920/ ... -not-found
Подробнее здесь: https://stackoverflow.com/questions/674 ... -not-found