fastai coding guidelines

That's how #PEP8 tells you to name things in Python.

This is how I name things in Python:

1. Constants: All uppercase.
2. Classes: CapitalName.
3. Functions, variables, attributes: lowercase_underscore.
4. Alle internen Methoden die nur innerhalb der Klasse aufgerufen werden: _leading.

Naming conventions are critical to improving the readability of your code.

Underscore at the end of a method changes in place the thing that it is being applied to!