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I don't understand how to compose Intents/Effects together properly

1

I'm trying to get my head around this library and I'm having some trouble understanding how I'm meant to structure Effects that are built out of other Effects, and how...

ckp95

- [ ] delays between retries: - [ ] constant - [ ] exponential - [ ] randomized modifier - [ ] maximum number of retries - [ ] super...

radix

Support for async/await syntax

1

It will be cool to write effect code using async/await syntax introduced in [PEP 492](https://www.python.org/dev/peps/pep-0492). For example, following code using `do` decorator: ```python @do def eff_func(): r1 = yield Effect(Intent1())...

manishtomar

The inverse is called 'catch' so it would seem to make sense (and allow for dropping the gross trailing underscore).

glyph

These are all the same function: - https://github.com/python-effect/effect/blob/826cbc5b6917683ba6ddf70cd693d3028ecdf226/effect/_test_utils.py#L52 - https://github.com/python-effect/effect/blob/826cbc5b6917683ba6ddf70cd693d3028ecdf226/effect/_base.py#L183 - https://github.com/python-effect/effect/blob/826cbc5b6917683ba6ddf70cd693d3028ecdf226/effect/test_retry.py#L63 so probably some of them should import the one implementation

glyph

perform masks errors

9

This is perhaps a usage bug rather than a bug in effect, but: ``` class Print: def __init__(self, line): self.line = line @sync_performer def real_print(dispatcher, print_): print(print_.line) import pdb;pdb.Pdb(stdout=sys.stderr).set_trace() sys.stdout.flush()...

rbtcollins

Record debugging information during perform, and report it when unexpected errors occur

1

Similar to https://twistedmatrix.com/trac/ticket/6538 , which is for tracing callback history on Deferreds, I think we should have this feature for Effects. I _hope_ that it will be easier for Effects....

radix

It would be nice to have an analog of [DeferredSemaphore](http://twistedmatrix.com/documents/current/api/twisted.internet.defer.DeferredSemaphore.html) and/or [DeferredLock](http://twistedmatrix.com/documents/current/api/twisted.internet.defer.DeferredLock.html). This could then be used to implement #8.

radix

Log unhandled errors during perform

1

Unlike Deferreds, Effects can't have callbacks added to them after a result is available. This means that they have a handy property that once an effect has been performed, and...

radix

Original ask: https://github.com/rackerlabs/otter/pull/789/files?diff=split#diff-46adfe1ec6f5f279e1d90dc10518c9abR188

lvh