import csv


def readCSV(fil):
    """ 
    read csv file of email information and convert to nested list;
    args: fil (string, csv file path)
    returns: data (csv file as nested list)
    """
    data = [];
    with open(fil) as csvDataFile:
        csvReader = csv.reader(csvDataFile)
        for row in csvReader:
             data.append(row)
    return data