On Fri, Feb 12, 2021 at 1:01 AM Henry Harutyunyan <henryharutyunyan@gmail.com> wrote:
this is fine as long as you need to use that filter for once. But if you want to reuse it you either need to create the iterator every time specifying the filter function, or save the function in a var and create the filter with that.
I'm wondering why can't we create custom filters and mappers that are reusable. The result will look something like this:
```
pass_filter = filter(lambda x: x > 60) foo = [42, 56, 67, 87] for i in pass_filter(foo): print(i) 67 86 bar = {45, 94, 65, 3} for i in pass_filter(bar): print(i) 65 94
Are there any drawbacks or limitations to this? Is is worth working on?
Why not simply define your function and give it a name? def above_sixty(x): return x > 60 That'd give you most of the same benefits. Making filter/map do something completely different if you omit an argument is a bug magnet. ChrisA