syntax - What does it mean += in Python?

Question

What does it mean when it's like this:

self.something += ('somethin',)

What does "+=" mean and what does the comma mean?

Answer 1

The expression a += b is shorthand for a = a + b, where a and b can be numbers, or strings, or tuples, or lists (but both must be of the same type).

The comma in ('x',) means that this is a tuple of a single element, 'x' . If the comma is absent, is just an 'x' between parenthesis.