PyCharm Concepts
Internal
Overview
Python Interpreter
PyCharm needs at least one Python interpreter. It can be chosen from the system interpreter
System Interpreter
A system interpreter is the interpreter that comes with the Python installation on the system. The system interpreter can be used solely for all Python scripts or as a base interpreter for the Python virtual environments.
Virtual Environment
A virtual environment consists of a base interpreter and installed packages. It manages settings and dependencies of a particular project, regardless of other Python projects. Several types of virtual environments are available: Virtualenv, Pipenv, Poetry and Conda.
Virtualenv
virtualenv is a tool to create isolated Python environments. virtualenv is bundled in PyCharm, which uses it to create a project-specific virtual environment. For Python 3.3+, the built-in venv module is used, instead of virtualenv
Pipenv
Pipenv is another tool that provides all necessary means to create a virtual environment for a Python project. It automatically manages project packages through the Pipfile file as you install or uninstall packages.
Poetry
Poetry is a tool that facilitates creating a Python virtual environment based on the project dependencies. You can declare the libraries your project depends on, and Poetry will install and update them for you.