what type of variable is one that opens a file?

Question

I know that if a variable is a word then it is a string. If it has numbers it is a float.

What type of variable would it be if it opens a code. Here is my code:

problem = open('problems.txt')
lines=problem.readlines()

Answer 1

You need to use

type(problem)

Which gives you :

<type 'file'>