Я загрузил и установил pip. Как установить пакеты?

Сначала для поиска пакета на PyPI

pip search <seach_string>

Пример:

pip search ply | grep -i '^ply'

Пример:

plyer                     - Platform-independant wrapper for platform-dependant APIs
plyvel                    - Plyvel, a fast and feature-rich Python interface to LevelDB
plywood                   - A template language grammar inspired by the Python code aesthetic
ply                       - Python Lex & Yacc
plytix-retailers-sdk      - Plytix Retailers SDK for Python
plymgf                    - A MGF files reader with PLY
plyfile                   - PLY file reader/writer
plypatch                  - Ply: Git-based Patch Management
plyj                      - A Java parser written in Python using PLY.
plyr                      - UNKNOWN
PlyPlus                   - a friendly yet powerful LR-parser written in Python

Сначала для поиска пакета на PyPI

pip install <package_name>

Пример:

pip install ply