py27-flask @2.0.2: ImportError: cannot import name json

[cooljeanius (Eric Gallager)]

Attempting to upgrade from py27-flask 1.1.4 to 2.0.2 results in the following error for me:

Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-flask/py27-flask/work/Flask-2.0.2" && /opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 setup.py --no-user-cfg build 
DEBUG: system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-flask/py27-flask/work/Flask-2.0.2" && /opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 setup.py --no-user-cfg build 
Traceback (most recent call last):
  File "setup.py", line 14, in <module>
    "dotenv": ["python-dotenv"],
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/__init__.py", line 162, in setup
    return distutils.core.setup(**attrs)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 124, in setup
    dist.parse_config_files()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/dist.py", line 702, in parse_config_files
    ignore_option_errors=ignore_option_errors)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/config.py", line 121, in parse_configuration
    meta.parse()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/config.py", line 426, in parse
    section_parser_method(section_options)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/config.py", line 399, in parse_section
    self[name] = value
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/config.py", line 184, in __setitem__
    value = parser(value)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/config.py", line 515, in _parse_version
    version = self._parse_attr(value, self.package_dir)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/config.py", line 349, in _parse_attr
    module = import_module(module_name)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-flask/py27-flask/work/Flask-2.0.2/src/flask/__init__.py", line 6, in <module>
    from . import json as json
ImportError: cannot import name json
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-flask/py27-flask/work/Flask-2.0.2" && /opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 setup.py --no-user-cfg build 
Exit code: 1
Error: Failed to build py27-flask: command execution failed
DEBUG: Error code: CHILDSTATUS 76720 1

All the python3-series versions of py-flask work fine for me, though (that's py35-flask thru py310-flask).

[reneeotten (Renee Otten)]

version 2.x ​dropped support for PY27 and PY35, so it's not all that surprising that this doesn't work...

[cooljeanius (Eric Gallager)]

Replying to reneeotten:

version 2.x ​dropped support for PY27 and PY35, so it's not all that surprising that this doesn't work...

Huh, if it dropped support for py35, then I guess it is kinda surprising that that still works, though...

[reneeotten (Renee Otten)]

Replying to cooljeanius:

Replying to reneeotten:

version 2.x ​dropped support for PY27 and PY35, so it's not all that surprising that this doesn't work...

Huh, if it dropped support for py35, then I guess it is kinda surprising that that still works, though...

probably upstream is not explicitly testing anymore with Python 3.5 (and therefore dropped official support), but they might not have used features yet that break there...

[catap (Kirill A. Korinsky)]

In 744f0f83560c6124f2eb2ae013e6355df98fc179/macports-ports (master):

py-flask: update to 2.1.1

Also drop support of python 3.5 and 3.6 which can't be used because it
hasn't got supported by py-werkzeug.

Fixes: #64158