Python code insight
- Syntax highlighting
The PyCharm editor respects highlighting of the keywords, comments, parameters, type hints and so on.
The particular highlighting colors are defined in the Editor | Color Scheme page of the Settings/Preferences dialog.
- Code completion
PyCharm supports Code completion.
As PyCharm indexes your whole project on each startup, it allows you to autocomplete any existing entity wherever it is defined.
- Navigating to declaration
PyCharm allows you to navigate to a location where a particular named code reference has been first declared.
This is done most easily: just put the caret at the symbol in the editor and press Ctrl+B:
- Show expression type
While analyzing your code, you often need to identify the type of a particular expression. Consider the following code:def f(x: str): print(chr(x.index('o')) * 42 + 'xxx')
Press Ctrl+Shift+P and select the target expression from the list.
The expression type will be shown in the tooltip.
To preview the definition of the selected expression, press Ctrl and hover your mouse pointer or the cursor over the expression.
- Checking regular expressions
If your code contains a regular expression, there is an intention action to check it: just put the caret at the regular expression and press Alt+Enter. The RegExp checker shows up, and you have to type the string. If your string doesn't match, the background is red; if it does - green:
Read this section for details.
- Viewing reference documentation
With PyCharm, you don’t need to surf the web every time you stumble across some alias, or search your whole application for a method declaration you can’t remember. Just put the caret at a keyword you want to look up, and press Ctrl+Q:
See Quick documentation for details.