Comment 0 for bug 1813361

cloud-init's xenial toxenv falls over on tip of master 7a4696596bbcccfedf5c6b6e25ad684ef30d9cea
in Ubuntu Disco python37 environments. Some of the tox dependencies like httpretty are exhibiting issues with python3.7

Make "all the tox things" work on Disco

type of errors seen running tox -r -e xenial on Disco

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ERROR: tests.unittests.test_datasource.test_openstack.TestOpenStackDataSource.test_wb__crawl_metadata_does_not_persist
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Traceback (most recent call last):
  File "/home/ubuntu/cloud-init/.tox/xenial/lib/python3.7/site-packages/httpretty/core.py", line 1055, in wrapper
    return test(*args, **kw)
  File "/home/ubuntu/cloud-init/tests/unittests/test_datasource/test_openstack.py", line 395, in test_wb__crawl_metadata_does_not_persist
    _register_uris(self.VERSION, EC2_FILES, EC2_META, OS_FILES)
  File "/home/ubuntu/cloud-init/tests/unittests/test_datasource/test_openstack.py", line 126, in _register_uris
    body=get_request_callback)
  File "/home/ubuntu/cloud-init/.tox/xenial/lib/python3.7/site-packages/httpretty/core.py", line 938, in register_uri
    match_querystring)
  File "/home/ubuntu/cloud-init/.tox/xenial/lib/python3.7/site-packages/httpretty/core.py", line 760, in __init__
    self.info = URIInfo.from_uri(uri, entries)
  File "/home/ubuntu/cloud-init/.tox/xenial/lib/python3.7/site-packages/httpretty/core.py", line 730, in from_uri
    result = urlsplit(uri)
  File "/usr/lib/python3.7/urllib/parse.py", line 400, in urlsplit
    url, scheme, _coerce_result = _coerce_args(url, scheme)
  File "/usr/lib/python3.7/urllib/parse.py", line 123, in _coerce_args
    return _decode_args(args) + (_encode_result,)
  File "/usr/lib/python3.7/urllib/parse.py", line 107, in _decode_args
    return tuple(x.decode(encoding, errors) if x else '' for x in args)
  File "/usr/lib/python3.7/urllib/parse.py", line 107, in <genexpr>
    return tuple(x.decode(encoding, errors) if x else '' for x in args)
AttributeError: 're.Pattern' object has no attribute 'decode'

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