get_default_input_after_limited_waiting_time

import sys, time, msvcrt
#
# 일정 시간이 지나면 자동으로 default 값이 입력으로 들어온 것으로 간주하고 return됨
# get default input after limited secs.
#
def readInput(caption, default, timeout = 5):
    if caption != '' :
        print (caption)
    start_time = time.time()
    input = ''
    while True:
        if msvcrt.kbhit():
            byte_arr = msvcrt.getche()
            if ord(byte_arr) == 13: # enter_key
                break
            elif ord(byte_arr) >= 32: #space_char
                input += "".join(map(chr,byte_arr))
        # change and to or. if there is an input or timeout
        if len(input) == 0 or (time.time() - start_time) > timeout:
#           print("timing out, using default value.")
            break

#    print('')  # needed to move to next line
    if len(input) > 0:
        return input
    else:
        return default

ret = readInput("testing limited waiting(3sec) input", 'no input', 3 )
print ("input is ", ret)
print('end')