Generator and coroutine repr could be more helpful

[pitrou]

BPO	32469
Nosy	@pitrou, @benjaminp, @serhiy-storchaka, @1st1, @tarasmatsyk
PRs	bpo-32469: Improve representation of the coroutines #5068

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-12-31.19:53:29.096>
labels = ['interpreter-core', 'type-feature', '3.8']
title = 'Generator and coroutine repr could be more helpful'
updated_at = <Date 2018-06-11.07:52:58.314>
user = 'https://github.com/pitrou'

bugs.python.org fields:

activity = <Date 2018-06-11.07:52:58.314>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2017-12-31.19:53:29.096>
creator = 'pitrou'
dependencies = []
files = []
hgrepos = []
issue_num = 32469
keywords = ['patch']
message_count = 3.0
messages = ['309302', '309315', '319280']
nosy_count = 5.0
nosy_names = ['pitrou', 'benjamin.peterson', 'serhiy.storchaka', 'yselivanov', 'tarasmatsyk']
pr_nums = ['5068']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue32469'
versions = ['Python 3.8']

[pitrou]

Currently, a generator or coroutine's repr looks like this:

>>> gen
<coroutine object f at 0x7f86c9733790>

It could instead be something like:

>>> gen
<coroutine at 0x7f86c9733790, suspended, file "/home/antoine/cpython/default/Lib/logging/__init__.py", line 123, code getLogger>

(replace "suspended" with "running" or "closed" depending on the generator's status -- i.e. gi_running and gi_frame attributes)

[tarasmatsyk]

I have added a pull request. Hope it makes sense and I've done everything correctly :)

Happy New Year!

[serhiy-storchaka]

Isn't it too verbose? For comparison, the repr of function doesn't contain the file path and the line number. And the hexadecimal address in the middle looks distractive.