python input key example

	# String is written by Korean.
	import sys
	while True:
	try:
	x = int(raw_input("정수를 입력하시오: "))
	break
	except ValueError:
	print "정수가 아닙니다. 다시 입력하세요..."
	if x < 0:
	x = 0
	print '음수가 영으로 바뀜'
	elif x == 0:
	print '영'
	elif x == 1:
	print '일'
	else:
	print '일보다큼'

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