In python the with keyword is used when working with unmanaged resources (like file streams). It is similar to the using statement in VB.NET and C#. It allows you to ensure that a resource is …

Nov 20, 2009 · Notes kwargs is variable name used for keyword arguments, another variable name can be used. The important part is that it's a dictionary and it's unpacked with the double …

Oct 24, 2008 · Yield in Python used to create a generator function. Generator function behaves like an iterator, which can be used in loop to retrieve items one at a time. When a generator …

Although Python 2 is officially unsupported as of January 1, 2020, if for some reason you are forced to maintain a Python 2.x codebase and need an equivalent to nonlocal, see nonlocal …

Oct 20, 2013 · Note that in Python, variables exist by virtue of being used. You don't need to declare a variable first, so there are no really empty variables in Python. Setting a variable to …

192 What does the “at” (@) symbol do in Python? In short, it is used in decorator syntax and for matrix multiplication. In the context of decorators, this syntax:

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 …

Jul 11, 2016 · In Python, the module is the natural place for global data: Each module has its own private symbol table, which is used as the global symbol table by all functions defined in the …

Jul 20, 2010 · In Python, the 'null' object is the singleton None. To check if something is None, use the is identity operator:

Sep 13, 2009 · How are "keyword arguments" different from regular arguments? Can't all arguments be passed as name=value instead of using positional syntax?