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Encode set, frozenset, bytearray, and iterators as json arrays #75338
Description
| BPO | 31155 |
|---|---|
| Nosy | @rhettinger, @etrepum, @salty-horse, @methane, @onealj, @sedrubal |
| PRs |
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 = 'https://github.com/etrepum'
closed_at = <Date 2019-04-08.07:52:33.134>
created_at = <Date 2017-08-09.09:23:16.665>
labels = ['3.7', 'type-feature', 'library']
title = 'Encode set, frozenset, bytearray, and iterators as json arrays'
updated_at = <Date 2021-10-07.08:11:02.536>
user = 'https://github.com/onealj'bugs.python.org fields:
activity = <Date 2021-10-07.08:11:02.536>
actor = 'sedrubal'
assignee = 'bob.ippolito'
closed = True
closed_date = <Date 2019-04-08.07:52:33.134>
closer = 'methane'
components = ['Library (Lib)']
creation = <Date 2017-08-09.09:23:16.665>
creator = 'javenoneal'
dependencies = []
files = []
hgrepos = []
issue_num = 31155
keywords = []
message_count = 4.0
messages = ['299981', '315782', '315789', '339597']
nosy_count = 6.0
nosy_names = ['rhettinger', 'bob.ippolito', 'salty-horse', 'methane', 'javenoneal', 'sedrubal']
pr_nums = ['3034']
priority = 'normal'
resolution = 'rejected'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue31155'
versions = ['Python 3.7']
Activity
onealj commentedon Aug 9, 2017
Currently json.dump, json.dumps, and json.JSONEncoder do not support writing iterator objects. Users can choose to pass the iterator to a tuple and write that as a json array, but this is wasteful if the iterator is large, requiring a large amount of memory to be temporarily allocated for the tuple prior to json encoding.
The json module also does not support writing sets, frozensets, or bytearrays.
salty-horse commentedon Apr 26, 2018
If sets are to be supported, then so should dictionary views.
Please also consider the range type.
rhettinger commentedon Apr 26, 2018
There is some virtue to the current design. Having a user explicitly cast to a list will avoid unintentional conversions.
methane commentedon Apr 8, 2019
I concur with Raymond.
If you really need this feature, please discuss on python-dev ML.