Jan 17, 2013 · In more detail, Python 2.x has docstrings, which allow you to attach a metadata string to various types of object. This is amazingly handy, so Python 3 extends the feature by …

Python calls __enter__ when execution enters the context of the with statement and it’s time to acquire the resource. When execution leaves the context again, Python calls __exit__ to free …

Functions, in Python, are first class objects - which means you can pass a function as an argument to another function, and return functions. Decorators do both of these things.

In Python, the use of an underscore in a function name indicates that the function is intended for internal use and should not be called directly by users. It is a convention used to indicate that …

What do single and double leading underscores before an object's name represent in Python?

811 The reason you need to use self is because Python does not use special syntax to refer to instance attributes. Python decided to do methods in a way that makes the instance to which …

650 Explain all in Python? I keep seeing the variable __all__ set in different __init__.py files. What does this do? What does __all__ do? It declares the semantically "public" names from a …

2 This question already has answers here: What does -> mean in Python function definitions? (12 answers)

This is not really correct. __str__ is the output that is supposed to be human readable: __repr__ is supposed to be a representation readable for the Python interpreter (i.e. feeding the string to …

What does the asterisk mean when there is no argument name? For example in some functions of the class pprint.