'Determening if a list of bachelor courses has a prerequisite or not in python

I have to write a code that determines if a course has a prerequisite or not. In the list at the bottom the 2 courses are mathematics 2, and physics electro magnetics. When I run the code given it says that all the courses have a prerequisite, only the last "none" contains "No prerequisites". I don't understand what I am doing wrong.

fhand = open('ba1.txt')
    for i in fhand:
        courses = i.split(";")
        print(courses[1])
        if courses[1] == "none":
            print("No prerequisites")
        else: 
            print("There is a prerequisite")

mathematics 1;none

chemistry 1;none

basics of physics;none

geosciences;none

principles of sustainability;none

applied biological sciences;none

introduction to informatics;none

mathematics 2;mathematics 1:end

physics electro magnetics;mathematics 1:end

integrative project;none

python

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'Determening if a list of bachelor courses has a prerequisite or not in python

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