Twice as shifty

twice_as_shifty.py

# Find a number n which is_twice_as_shifty(n)
def is_twice_as_shifty(n):
    n = int(n)
    if n < 1:
        return False

    n_str = str(n)
    n_times_two_str = n_str[-1] + n_str[:-1]  # Shift the digits around
    n_times_two = int(n_times_two_str)

    difference = n_times_two - n*2  # Tadaa! It should've doubled
    if difference:
        print ('You missed by {}'.format(abs(difference)))
        return False

    return True

# Close, but no cigar
print (is_twice_as_shifty(25))