Question

I am attempting to write a single line of Python code for the following:

is_valid = False
for single_object in object_list:
  if single_object.test == test:
    is_valid = True

if not is_valid:
  return 'Bad data!'

I know that there has to be a way to accomplish this in less code. I mean, it’s Python!

Answer 1

is_valid = any(o.test == test for o in object_list)

The any(iterable) function returns True if any of the values in iterable are True, and False if none of them are. I’m using a “generator expression” to go through the values in object_list and evaluate the condition.