'''
    DS2000
    Fall 2024
    Sample code from class - time series data for average admin assistant salaries in boston over time

    Our plan today: read in the file using a for loop
    with open(filename, "r") as infile:
        for line in infile:
            sal = float(line)

    (Remembering that sal will get overwritten over and over :)

    Computation for today:
    * What was the change in avg salary each year?
'''

FILENAME = "asst_salaries.txt"

def main():
    # Initializing a variable to measure increases going foward, and
    # example of inside/outside the for loop!
    print("Hi I am outside the for loop and I happen ONCE, at the beginning!")
    previous_sal = 0

    # Gather data - read from the file using a for loop!
    with open(FILENAME, "r") as infile:
        for line in infile:

            # Save the current line from the file as a float,
            # compute the increase compared to last year
            sal = float(line)
            incr = sal - previous_sal
            previous_sal = sal

            # Just printing to see examples :)
            print("this year's salary:", sal)
            print("incr:", incr, "\n")

    print("Hi I am outside the for loop so I happen ONCE, at the end!")

main()