L=[]

#The createDatabase function opens the input file, reads it and returns a list of lists, L.
def createDatabase():

    file=open("CD_Store.txt", 'r')

    for i in file:
        line=i.strip("\n")
        line=line.split(",")
        L.append(line)

    #Opens the file, gets each record as a list consisting of of elements, and appends each line to the empty list,
    file.close()
    return L