ENH: Added slides for FFT and basic signal processing, wherein we
introduce some random number generation also. Misc. cleanup for
tutorial.
def is_perfect_square(n):
i = 1
while i * i < n:
i += 1
return i * i == n
def all_digits_even(n):
if n < 0: n = -n
while n > 0:
if n % 2 == 1:
return False
n /= 10
return True
for i in range(2222, 8888):
if all_digits_even(i) and is_perfect_square(i):
print i