types module can be implemented only in Python

[benjaminp]

BPO	2408
Nosy	@amauryfa, @tiran, @benjaminp
Files	expose_cell.patch: exposes cell objects expose_cell_python.patch: better implementation types_in_python.diff: makes the types module use python only

^{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 = <Date 2008-04-08.22:09:42.495>
created_at = <Date 2008-03-18.21:09:29.487>
labels = ['interpreter-core', 'type-feature', 'library']
title = 'types module can be implemented only in Python'
updated_at = <Date 2008-04-08.22:09:42.487>
user = 'https://github.com/benjaminp'

bugs.python.org fields:

activity = <Date 2008-04-08.22:09:42.487>
actor = 'amaury.forgeotdarc'
assignee = 'none'
closed = True
closed_date = <Date 2008-04-08.22:09:42.495>
closer = 'amaury.forgeotdarc'
components = ['Interpreter Core', 'Library (Lib)']
creation = <Date 2008-03-18.21:09:29.487>
creator = 'benjamin.peterson'
dependencies = []
files = ['9740', '9743', '9745']
hgrepos = []
issue_num = 2408
keywords = ['patch']
message_count = 7.0
messages = ['63988', '64001', '64003', '64004', '64007', '64252', '65221']
nosy_count = 3.0
nosy_names = ['amaury.forgeotdarc', 'christian.heimes', 'benjamin.peterson']
pr_nums = []
priority = 'normal'
resolution = 'accepted'
stage = None
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue2408'
versions = ['Python 2.6']

[benjaminp]

types currently exposes all types used by the interpreter except cell
objects. This patch adds support for that and adds to the docs. I
couldn't find a way to access the cell type through Python, so I added
it to the _types module.

[amauryfa]

The following python code retrieves the cell type, and could be added to
types.py:

def _f(x=None):
   def g():
      x
   return g

CellType = type(_f().func_closure[0])

OTOH, you are unlikely to need it. Do you have a use case, or is it just
to have the full list of types?

[amauryfa]

While I'm at it, the _types module could be removed, because its exports
can easily be replaced by:

GetSetDescriptorType = type(Exception.args)
MemberDescriptorType = type(EnvironmentError.errno)

[benjaminp]

I've attached a patch which uses the Amaury's implementation.

OTOH, you are unlikely to need it. Do you have a use case, or is it just
to have the full list of types?
Mostly, I want a full list of types.

[benjaminp]

Okay, I removed the _types module in favor of your Python
implementation. Here's the patch.

[tiran]

Please have a look at patch bpo-1605, too. It implements a semi
autogenerated _types module which exposes all types in from Include/*.h

[amauryfa]

Committed r62231: remove _types module.

I did not add CellType though, because of discussion in bpo-1605.