This commit adds:
* Stubs for CGIHTTPServer in the Python 2 standard library, as requested in #1147.
* Stubs for six.moves.CGIHTTPServer in Python 2, as requested in #22.
This pull request is a follow-up to https://github.com/python/mypy/issues/7214.
In short, within that mypy issue, we found it would be helpful to
determine between contextmanagers that can "swallow" exceptions vs ones
that can't. This helps prevent some false positive when using flags that
analyze control flow such as `--warn-unreachable`. To do this,
Jelle proposed assuming that only contextmanagers where the `__exit__`
returns `bool` are assumed to swallow exceptions.
This unfortunately required the following typeshed changes:
1. The typing.IO, threading.Lock, and concurrent.futures.Executor
were all modified so `__exit__` returns `Optional[None]` instead
of None -- along with all of their subclasses.
I believe these three types are meant to be subclassed, so I felt
picking the more general type was correct.
2. There were also a few concrete types (e.g. see socketserver,
subprocess, ftplib...) that I modified to return `None` -- I checked
the source code, and these all seem to return None (and don't appear
to be meant to be subclassable).
3. contextlib.suppress was changed to return bool. I also double-checked
the unittest modules and modified a subset of those contextmanagers,
leaving ones like `_AssertRaisesContext` alone.
As a followup to the work done in #2767 and #2830, and to address a
piece of #66, most of the email_mime submodules aren't typed in six
under python2, only python3. Now they are.
All Python 3 versions supported by typeshed (3.4+) have enum as part
of the standard library.
Make the third-party Python 2 version consistent with the Python 3 version.
pathlib2 is the Python 2.7 backport of the pathlib module from Python 3.
Hence we use the same stub file for both.
The maintainer of pathlib2 granted permission for stubs to be added in
mcmtroffaes/pathlib2#44.
I found some code that called DEFINE_integer() and DEFINE_float() with default set to None. Perusing the code that seems to be a totally valid usage. I am not super familiar with gflags but I believe this PR consistently changes all those default values to Optional[].
Make the Python 2 and 3 concurrent.futures stubs identical so fixes get
applied to both.
For example, #1305 and #2233 fixed the same problem at different times,
as did #1078 and #1911.
By making the stubs identical, we apply the fix from #1711 to Python 2.
Fixes#2234.
Use parameterized types in Future.add_done_callback(), wait(), and
as_completed().
Mark the traceback argument to Future.set_exception_info() as optional.
The Python 2 version was slightly outdated compared to the Python 3
version.
The Python 2 version of Headers.__delitem__() had an optional argument
_index_operation that also exists in the implementation. But considering
this is internal use only, it was missing from the Python 3 version, and
it created problems with derived classes, I decided not to add it to
the merged stub. See also pallets/werkzeug#1051.
* Move google protobuf from 2 to 2and3
This should generally be ok. I ran the internal consistency
tests and they seemed to pass.
* Convert str to bytes
* repr to use str in google.protobuf.internal.containers
