It doesn't bother you that you're checking `min is None` even after you know it can't be (i.e., after one loop iteration)? Python doesn't make it pretty to get around this issue:
def min(foo):
it = iter(foo)
try:
m = next(it)
except StopIteration:
return None
for val in it:
if val < m:
m = val
return m
You could switch the order they're compared and due to short-circuiting the second eval would only ever take place once. Or initialize min to the zeroth item in the array.
