import os

# Variant 2
def solve(dir_files, dir_result, filename_result):
    filenames = os.listdir(dir_files)
    result = ''
    for filename in filenames:
        filepath = os.path.join(dir_files, filename)
        file = open(filepath, "r")
        result += f"{file.readline()}"
        file.close()

    if not os.path.exists(dir_result):
        os.makedirs(dir_result)
    if os.listdir(dir_result):
        return
    result_file = open(os.path.join(dir_result, filename_result), "w")
    result_file.write(result)
    result_file.close()

if __name__ == "__main__":
    solve('/var/data', '/var/result', 'data.txt')