betterinputfunc.py

# get_int_in_range(first, last)
# Forces the user to enter an integer within a
# specified range
# first is either a minimum or maximum acceptable value
# last is the corresponding other end of the range,
# either a maximum or minimum value
# Returns an acceptable value from the user

def get_int_in_range(first, last):
	# If the larger number is provided first,
	# switch the parameters

	if first > last:
		first, last = last, first
	# Insist on values in the range first....last
	in_value = int(input("Please enter values in the range" + str(first) + "....." + str(last) + ": "))

	while in_value < first or in_value > last:
		print(in_value,"is not in the range", first, "....", last)
		in_value = int(input("Please try again:"))
	# in_value at this point is guaranteed to be within range
	return in_value;

	# main
	# tests the get_int_in_range function

def main():
	print(get_int_in_range(10,20))
	print(get_int_in_range(20,10))
	print(get_int_in_range(5,5))
	print(get_int_in_range(-100,100))

main() #Run the program