PyCharm 3.4.1 (Mac OSX)

INTELLIGENT CODE EDITOR
Syntax highlighting — customizable editor colors for Python code and Django templates. Several predefined color themes.

Auto-Indentation and code formatting — automatic indents inserting on new line. Indents verification and code re-formatting according to project code-style settings.

Code completion for keywords, classes, variables, etc. as you type or via Ctrl-Space. Editor suggestions are context-aware and suggest most appropriate options.

Line and block commenting — single keystroke to comment/uncomment current line or selection

On-the-fly error highlighting — errors are shown as you type. Integrated spell-checker verifies your identifiers and comments for misspellings.

Code snippets — save time using advanced customizable and parametrized code templates and snippets.

Code folding, auto-insertion of braces, brackets & quotes, Matching brace/bracket highlighting, etc.

Code Navigation
EASY CODE NAVIGATION & SEARCH
Go to class / file / symbol — crucial operations for fast project navigation. Use wild-cards and abbreviations to locate needed items faster.

Go to declaration — when invoked from a reference, opens the corresponding file and navigates to the symbol declaration.

Find Usages — helps you locate usages of any symbol (e.g., class, method, field, etc.) in your code, in the current file or in the whole project.

Code Analysis and Transformation
CODE ANALYSIS
Numerous code inspections verify Python code as you type and also allow inspecting the whole project for possible errors or code smells.

Quick-fixes for most inspections make it easy to fix or improve the code instantly. Alt+Enter shows appropriate options for each inspection.

CONFIGURABLE LANGUAGE INJECTIONS
Language injections allow you to natively edit non-Python code, which is embedded into string literals, with code completion, error-highlighting, and other coding assistance features.

Refactoring
PYTHON REFACTORING
Rename refactoring allows to perform global code changes safely and instantly. Local changes within a file are performed in-place. Refactorings work in plain Python and Django projects.

Use Introduce Variable/Field/Constant and Inline Local for improving the code structure within a method, Extract Method to break up longer methods, Extract Superclass, Push Up, Pull Down and Move to move the methods and classes.

DOCUMENTATION
Quick definition / documentation view — see the object definition or documentation in-place without losing your context.

External documentation view in browser for Python standard library, Django and Google App Engine (Shift-F1).

Epydoc and reStructuredText markup highlighting and code completion for tags and tag parameters. Docstrings and the code matching verification, and autoupdate on refactoring.

Automatic generation of a docstring stub (either Epydoc or reStructuredText) for a method.