Assign variable in while loop condition in Python?

Question

I just came across this piece of code

while 1:
    line = data.readline()
    if not line:
        break
    #...

and thought, there must

Answer 1

for line in data:
    ... process line somehow....

Will iterate over each line in the file, rather than using a while. It is a much more common idiom for the task of reading a file in my experience (in Python).

In fact, data does not have to be a file but merely provide an iterator.