> i am new to python guys.
> i have a list of numbers
>
> say a = [1,-1,3,-2,4,-6]
>
> how should i check for negative values in the list
I'm not sure if this is a homework problem, as it seems to be a
fairly simple programming problem whether you know Python or not.
If you're using 2.5 or more recent, you should be able to do
something like
if any(x < 0 for x in a):
yep()
else:
nope()
If "a" is small, you could do
if [x for x in a if x < 0]:
yep()
else:
nope()
Or you could write your own function:
def has_negatives(iterable):
for x in iterable:
if x < 0: return True
return False
if has_negatives(a):
yep()
else:
nope()
-tkc
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