Learn Web Development with Python

Improving readability

Coders sometimes don't see the point in writing a function with a body of one or two lines of code, so let's look at an example that shows you why you should do it.

Imagine that you need to multiply two matrices:

Would you prefer to have to read this code:

# matrix.multiplication.nofunc.pya = [[1, 2], [3, 4]]b = [[5, 1], [2, 1]]c = [[sum(i * j for i, j in zip(r, c)) for c in zip(*b)]     for r in a]

Or would you prefer this one:

# matrix.multiplication.func.py# this function could also be defined in another moduledef matrix_mul(a, b):    return [[sum(i * j for i, j in zip(r, c)) for c in zip(*b)]            for r in a]a = [[1, 2], [3, ...