I'm trying to implement my own version of itertools.compress, the problem is that i stumbled upon the return type. I mean both of these functions return an iterator, but i think the second one is n...

My understanding of yield from is that it is similar to yielding every item from an iterable. Yet, I observe the different behavior in the following example. I have Class1 class Class1: def __init...

I had a code below in Python 3.2 and I wanted to run it in Python 2.7. I did convert it (have put the code of missing_elements in both versions) but I am not sure if that is the most efficient way ...

I have the following XML file from this link as sample: I have the following recursive function which prints output: import xml.etree.ElementTree as ET def perf_func(elem, func, level=0): func(el...

Update: I've started a thread on python-ideas to propose additional syntax or a stdlib function for this purpose (i.e. specifying the first value sent by yield from). So far 0 replies... :/ How do...

i'm trying to compress a list using generator: examples [1, 1, 1, 1, 2, 2, 2, 1, 1, 1] == [1, 2, 1] [5, 5, 5, 4, 5, 6, 6, 5, 5, 7, 8, 0, 0])) == [5, 4, 5, 6, 5, 7, 8, 0] I tried to use a ge...

Initially (PEP 380), yield from syntax was introduced to be used for delegating to a "subgenerator." Later it was used with now deprecated generator-based coroutines. I cannot find out what kind o...

Consider the following code snippet. from typing import Iterable def geometric_progression( start: float, multiplier: float, num_elements: int ) -> Iterable[float]: assert num_elements >...

I have a function that gives back a generator. At the moment it uses yield from: function foo() { $generator = getGenerator(); // some other stuff (no yields!) yield from $generator; } If I r...

I have a Connection type that I’m using to wrap read/write stream pairs from asyncio. class Connection(object): def __init__(self, stream_in, stream_out): self._streams_ = (stream_in, stream_out...

Is it possible to nest yield from statements? The simple form is obvious: def try_yield1(): x = range(3) yield from x Which produces: 0 1 2 But what if I have nested generators? def try_y...

Let's say I have these parsers: parsers = { ".foo": parse_foo, ".bar", parse_bar } parse_foo and parse_bar are both generators that yield rows one by one. If I wish to create a single dispatch...

I haven't been able to find any examples of return values from the yield from expression. I have tried this simple code, without success: def return4(): return 4 def yield_from(): res = yield ...

When wrapping an (internal) iterator one often has to reroute the __iter__ method to the underlying iterable. Consider the following example: class FancyNewClass(collections.Iterable): def __init...

In Python most examples of yield from explain it with saying that yield from foo() is similar to for x in foo(): yield x On the other hand it doesn't seem to be exactly the same and there's...