logs

def append_log(line: dict, file: string):
    logfile = open(file, 'a+')
    print>>logfile, line
    logfile.close()
    return


def compare_line(line: dict, file: string):
    file = open(file, 'r+')
    contents = logfile.readlines()
    logfile.close()

    # Check log files for duplicates
    for row in contents:
        test = cmp(line, row)
        if test == 0:
            # return None if a match is found
            return None

    # No duplicate found
    return True

# Check if the log file contains the transaction
# by compare_line(dict, logfile). If it returns true,
# add the line to log file append_log(dict, logfile)
# and then push line to Fiken. If false, skip the line.