Add python 3.10 support

[rakshith91]

Expected Behavior

Python 3.10 must be supported and should be here in the classifiers https://github.com/cloudevents/sdk-python/blob/master/setup.py#L41

Actual Behavior

It's not there :)

Steps to Reproduce the Problem

smoke test using 3.10

Specifications

• Platform: -
• Python Version: 3.10

If it's okay - I can take a stab at this

[grant]

It looks like out of the box there are issues with testing python 3.10.

I tried a quick PR above.

I'm not sure if the errors. Maybe @di can comment on this ST:

Run python -m tox -e py
py create: /home/runner/work/sdk-python/sdk-python/.tox/py
py installdeps: -r/home/runner/work/sdk-python/sdk-python/requirements/test.txt, -r/home/runner/work/sdk-python/sdk-python/requirements/docs.txt, -r/home/runner/work/sdk-python/sdk-python/requirements/publish.txt
ERROR: invocation failed (exit code 1), logfile: /home/runner/work/sdk-python/sdk-python/.tox/py/log/py-1.log
================================== log start ===================================
Collecting flake8
  Downloading flake8-4.0.1-py2.py3-none-any.whl (64 kB)
Collecting pep8-naming==0.5.0
  Downloading pep8_naming-0.5.0-py2.py3-none-any.whl (7.1 kB)
Collecting flake8-import-order
  Downloading flake8_import_order-0.18.1-py2.py3-none-any.whl (15 kB)
Collecting flake8-print
  Downloading flake8_print-4.0.0-py3-none-any.whl (4.9 kB)
Collecting flake8-strict
  Downloading flake8_strict-0.2.1-py2.py3-none-any.whl (5.8 kB)
Collecting pytest==4.0.0
  Downloading pytest-4.0.0-py2.py3-none-any.whl (217 kB)
Collecting pytest-cov==2.4.0
  Downloading pytest_cov-2.4.0-py2.py3-none-any.whl (20 kB)
Collecting sanic==20.12.3
  Downloading sanic-20.12.3-py3-none-any.whl (80 kB)
Collecting aiohttp
  Downloading aiohttp-3.8.1-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl (1.2 MB)
Collecting Pillow
  Downloading Pillow-8.4.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (3.1 MB)
Collecting requests
  Downloading requests-2.26.0-py2.py3-none-any.whl (62 kB)
Collecting flask
  Downloading Flask-2.0.2-py3-none-any.whl (95 kB)
Collecting Sphinx==1.8.2
  Downloading Sphinx-1.8.2-py2.py3-none-any.whl (3.1 MB)
Collecting GitPython==3.1.7
  Downloading GitPython-3.1.7-py3-none-any.whl (158 kB)
Collecting cloudevents
  Downloading cloudevents-1.2.0-py3-none-any.whl (26 kB)
Collecting flake8-polyfill<2,>=1.0.2
  Downloading flake8_polyfill-1.0.2-py2.py3-none-any.whl (7.3 kB)
Collecting attrs>=17.4.0
  Downloading attrs-21.2.0-py2.py3-none-any.whl (53 kB)
Requirement already satisfied: setuptools in ./.tox/py/lib/python3.10/site-packages (from pytest==4.0.0->-r /home/runner/work/sdk-python/sdk-python/requirements/test.txt (line 6)) (58.3.0)
Collecting atomicwrites>=1.0
  Downloading atomicwrites-1.4.0-py2.py3-none-any.whl (6.8 kB)
Collecting more-itertools>=4.0.0
  Downloading more_itertools-8.12.0-py3-none-any.whl (54 kB)
Collecting pluggy>=0.7
  Using cached pluggy-1.0.0-py2.py3-none-any.whl (13 kB)
    163249 |                         (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
           |                         ^
    In file included from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/unicodeobject.h:1046,
                     from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/Python.h:96,
                     from uvloop/loop.c:20:
    /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/cpython/unicodeobject.h:446:26: note: declared here
      446 | static inline Py_ssize_t _PyUnicode_get_wstr_length(PyObject *op) {
          |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~
    uvloop/loop.c:163249:25: warning: ‘PyUnicode_AsUnicode’ is deprecated [-Wdeprecated-declarations]
    163249 |                         (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
           |                         ^
    In file included from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/unicodeobject.h:1046,
                     from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/Python.h:96,
                     from uvloop/loop.c:20:
    /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/cpython/unicodeobject.h:580:45: note: declared here
      580 | Py_DEPRECATED(3.3) PyAPI_FUNC(Py_UNICODE *) PyUnicode_AsUnicode(
          |                                             ^~~~~~~~~~~~~~~~~~~
    uvloop/loop.c:163249:25: warning: ‘_PyUnicode_get_wstr_length’ is deprecated [-Wdeprecated-declarations]
    163249 |                         (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
           |                         ^
    In file included from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/unicodeobject.h:1046,
                     from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/Python.h:96,
                     from uvloop/loop.c:20:
    /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/cpython/unicodeobject.h:446:26: note: declared here
      446 | static inline Py_ssize_t _PyUnicode_get_wstr_length(PyObject *op) {
          |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~
    uvloop/loop.c:163249:25: warning: ‘_PyUnicode_get_wstr_length’ is deprecated [-Wdeprecated-declarations]
    163249 |                         (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
           |                         ^
    In file included from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/unicodeobject.h:1046,
                     from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/Python.h:96,
                     from uvloop/loop.c:20:
    /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/cpython/unicodeobject.h:446:26: note: declared here
      446 | static inline Py_ssize_t _PyUnicode_get_wstr_length(PyObject *op) {
          |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~
    uvloop/loop.c:163249:25: warning: ‘PyUnicode_AsUnicode’ is deprecated [-Wdeprecated-declarations]
    163249 |                         (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
           |                         ^
    In file included from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/unicodeobject.h:1046,
                     from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/Python.h:96,
                     from uvloop/loop.c:20:
    /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/cpython/unicodeobject.h:580:45: note: declared here
      580 | Py_DEPRECATED(3.3) PyAPI_FUNC(Py_UNICODE *) PyUnicode_AsUnicode(
          |                                             ^~~~~~~~~~~~~~~~~~~
    uvloop/loop.c:163249:25: warning: ‘_PyUnicode_get_wstr_length’ is deprecated [-Wdeprecated-declarations]
    163249 |                         (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
           |                         ^
    In file included from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/unicodeobject.h:1046,
                     from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/Python.h:96,
                     from uvloop/loop.c:20:
    /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/cpython/unicodeobject.h:446:26: note: declared here
      446 | static inline Py_ssize_t _PyUnicode_get_wstr_length(PyObject *op) {
          |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~
    uvloop/loop.c: In function ‘__Pyx_Coroutine_Send’:
    uvloop/loop.c:165292:19: warning: implicit declaration of function ‘_PyGen_Send’; did you mean ‘_PyGen_yf’? [-Wimplicit-function-declaration]
    165292 |             ret = _PyGen_Send((PyGenObject*)yf, value == Py_None ? NULL : value);
           |                   ^~~~~~~~~~~
           |                   _PyGen_yf
    uvloop/loop.c:165292:17: warning: assignment to ‘PyObject *’ {aka ‘struct _object *’} from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
    165292 |             ret = _PyGen_Send((PyGenObject*)yf, value == Py_None ? NULL : value);
           |                 ^
    uvloop/loop.c:165297:17: warning: assignment to ‘PyObject *’ {aka ‘struct _object *’} from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
    165297 |             ret = _PyGen_Send((PyGenObject*)yf, value == Py_None ? NULL : value);
           |                 ^
    uvloop/loop.c: In function ‘__Pyx_Generator_Next’:
    uvloop/loop.c:165381:17: warning: assignment to ‘PyObject *’ {aka ‘struct _object *’} from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
    165381 |             ret = _PyGen_Send((PyGenObject*)yf, NULL);
           |                 ^
    uvloop/loop.c: In function ‘__Pyx_decode_c_bytes’:
    uvloop/loop.c:167057:9: warning: ‘PyUnicode_FromUnicode’ is deprecated [-Wdeprecated-declarations]
    167057 |         return PyUnicode_FromUnicode(NULL, 0);
           |         ^~~~~~
    In file included from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/unicodeobject.h:1046,
                     from /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/Python.h:96,
                     from uvloop/loop.c:20:
    /opt/hostedtoolcache/Python/3.10.0/x64/include/python3.10/cpython/unicodeobject.h:551:42: note: declared here
      551 | Py_DEPRECATED(3.3) PyAPI_FUNC(PyObject*) PyUnicode_FromUnicode(
          |                                          ^~~~~~~~~~~~~~~~~~~~~
    error: command '/usr/bin/gcc' failed with exit code 1
    ----------------------------------------
ERROR: Command errored out with exit status 1: /home/runner/work/sdk-python/sdk-python/.tox/py/bin/python -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-sta_p20p/uvloop_962951064b7d435c8805f7364d54ec84/setup.py'"'"'; __file__='"'"'/tmp/pip-install-sta_p20p/uvloop_962951064b7d435c8805f7364d54ec84/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-u76o7oj8/install-record.txt --single-version-externally-managed --compile --install-headers /home/runner/work/sdk-python/sdk-python/.tox/py/include/site/python3.10/uvloop Check the logs for full command output.

=================================== log end ====================================
ERROR: could not install deps [-r/home/runner/work/sdk-python/sdk-python/requirements/test.txt, -r/home/runner/work/sdk-python/sdk-python/requirements/docs.txt, -r/home/runner/work/sdk-python/sdk-python/requirements/publish.txt]; v = InvocationError('/home/runner/work/sdk-python/sdk-python/.tox/py/bin/python -m pip install -r/home/runner/work/sdk-python/sdk-python/requirements/test.txt -r/home/runner/work/sdk-python/sdk-python/requirements/docs.txt -r/home/runner/work/sdk-python/sdk-python/requirements/publish.txt', 1)
___________________________________ summary ____________________________________
ERROR:   py: could not install deps [-r/home/runner/work/sdk-python/sdk-python/requirements/test.txt, -r/home/runner/work/sdk-python/sdk-python/requirements/docs.txt, -r/home/runner/work/sdk-python/sdk-python/requirements/publish.txt]; v = InvocationError('/home/runner/work/sdk-python/sdk-python/.tox/py/bin/python -m pip install -r/home/runner/work/sdk-python/sdk-python/requirements/test.txt -r/home/runner/work/sdk-python/sdk-python/requirements/docs.txt -r/home/runner/work/sdk-python/sdk-python/requirements/publish.txt', 1)
Error: Process completed with exit code 1.