"""
func extractCities()
    open the file
    read one line to trash header
    create empty list for the cities
    for every line in the file
        split the line to get the city
        add the city to the list
    return the list
"""

def extractCities():
    fin = open("IA_population_data.txt","r")
    header = fin.readline()
    allCities = []
    for oneLine in fin:
        data = oneLine.split("\t")
        city = data[0]
        allCities.append(city)
    return allCities