import csv


def readCSV(filename):
    """ Process CSV file
    
    filename - Name of the CSV file which stores training data generated by the Simulator
    
    Returns all lines of the CSV file except the first one which contains column headers
    """
    # list for the output
    lines = []
    with open(filename) as csvfile:
        reader = csv.reader(csvfile)
        # iterates throuh each line of the CSV file
        for line in reader:
            # current line is appended to the list
            lines.append(line)
    # the first line contains column headers, therefore it must be filtered out
    return lines[1:]