binary = int(raw_input("Enter a binary number:"))
for i in range(binary):
    if (binary != 0 or binary != 1):
        print "Invalid input"
        binary = int(raw_input("Enter a binary number:"))

binary = int(raw_input("Enter a binary number:"))
for i in range(binary):
    print "for loop is testing", i, "in range", binary
    if (binary != 0 or binary != 1):
        print binary, "not equal to 0 or 1"
        binary = int(raw_input("Enter a binary number:"))
    else:
       print binary, "equal to 0 or 1"

binary = raw_input()
if False in [f == '0' or f == '1' for f in binary]:
	print "Not Binary"
else:
	print "Is Binary"

still_testing = True
while still_testing:
   bin = raw_input("\nEnter a binary number: ")
   if len(bin):
      still_testing = False
   for num in bin:
       if int(num) not in [0, 1]:
           print "Invalid input for", num
           still_testing = True