or _ in range(n))
for x in iter:
lists[key(x)].append(x)
return lists
```
Except it would be optimized like a library function (which means written in C,
I believe)
On Tuesday, September 22, 2020 at 12:16:39 PM UTC-7, Yakov Shalunov wrote:
> Python list comprehension is substantial
Python list comprehension is substantially faster than plan iteration, to the
point where
```
l0, l1 = [],[]
for x in l:
if cond(x):
l0.append(x)
else:
l1.append(x)
```
runs at about the same speed as
```
l0 = [x for x in l if cond(x)]
l1 = [x for x in l if not cond(x)]
```
