Python

Prerequisite

At least one Python interpreter is properly installed on your machine.

Python support

PyCharm supports the following versions of Python:

• Python 2: versions 2.6 and 2.7
• Python 3: from the version 3.4 up to the version 3.7

PyCharm 2018.1 integrates the following features of Python 3.7:

• PEP-544 -- Protocols: Structural subtyping (static duck typing)
• PEP-557 -- Data Classes
• PEP-560 -- Core support for typing module and generic types
• PEP-562 -- Module __getattr__ and __dir__
• PEP-563 -- Postponed Evaluation of Annotations

PyCharm provides support for Python 3.5 and (since 2016.3) Python 3.6, with the backing of the following:

• PEP-484 -- Type Hints
• PEP-448 -- Additional Unpacking Generalizations
• PEP-492 -- Coroutines with async and await syntax
• PEP-526 -- Syntax for variable annotations
• PEP-498 -- Literal String Interpolation
• PEP-515 -- Underscores in Numeric Literals
• PEP-525 -- Asynchronous Generators
• PEP-530 -- Asynchronous Comprehensions
• and more.

Python support in PyCharm includes:

• Dedicated project types .
• Ability to configure local and remote interpreters and virtual environments. .
• Python console.
• Run/debug configurations for Python, and Python remote debug.
• Code insight
• Code inspections.
• Intention actions .
• Code completion and resolve.
• Built-in code formatter and separate set of Python code style settings.
• Find usages in Python code.
• Testing frameworks.
• Quick documentation .
• Recognizing Python documentation comments.
• Documentation generators
• Configuring Python debugger.

  Note that the debugger contains speedup modules, which use Cython and are generated with a few changes in the regular files to cythonize the files. The Cython speedups are available for CPython versions 2.7, 3.4 and 3.5.

  • On Windows the compiled Cython extensions are bundled with PyCharm.
  • On Linux and Mac OS, Cython extensions should be compiled manually in one in two possible ways:
    • by clicking the link that appears in the warning after the first debugger launch.
    • by running the command from the warning manually in the terminal. A separate Cython extension should be compiled for each version of Python interpreter.

    If someone doesn't want to use Cython extensions for some reasons, the environment variable PYDEVD_USE_CYTHON=NO should be passed.

• UML Class diagrams for Python classes.