[issue30486] Allow setting cell value

[Antoine Pitrou]

New submission from Antoine Pitrou:

There are use cases for setting a cell value.  One such use case is for (un)pickling recursive closures (see heroic workaround here: https://github.com/cloudpipe/cloudpickle/pull/90/files#diff-d2a3618afedd4e124c532151eedbae09R74 ).  Other use cases may include tinkering around and general education value.

There also doesn't seem to be, AFAICS, any counter-indication to being able to do so.  It's already possible in C using PyCell_Set(), which is a public API.  It just lacks an API in Python land.  For example `cell_contents` could become a read/write property...

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components: Interpreter Core
messages: 294554
nosy: benjamin.peterson, gvanrossum, ncoghlan, pitrou, rhettinger
priority: normal
severity: normal
stage: needs patch
status: open
title: Allow setting cell value
type: enhancement
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30486>
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