What does a for loop within a list do in Python?

Question

Can someone explain the last line of this Python code snippet to me?

Cell is just another class. I don\'t understand how the for loop is be

Answer 1

It is the same as if you did this:

def __init__(self, region, srcPos, pos):
    self.region = region
    self.cells = []
    for i in xrange(region.cellsPerCol):
        self.cells.append(Cell(self, i))

This is called a list comprehension.