TypeError: cannot pickle 'generator' object with urllib 2.1.0, no error with urllib 1.26.18

[anton-daneyko-ultramarin]

I get a TypeError: cannot pickle 'generator' object error when using urllib3 v2.1.0 and the error goes away with urllib3 v1.26.18. The vcrpy version is 5.1.0; Python v3.10.13.

The stack trace leads to before_record_request in vcr/config.py. I probably won't be able to provide a good reproducible example right now, but I thought it might be helpful to leave some breadcrumbs for a future investigation:

/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/site-packages/requests/adapters.py:486: in send
    resp = conn.urlopen(
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/site-packages/urllib3/connectionpool.py:790: in urlopen
    response = self._make_request(
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/site-packages/urllib3/connectionpool.py:536: in _make_request
    response = conn.getresponse()
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/site-packages/vcr/stubs/__init__.py:257: in getresponse
    if self.cassette.can_play_response_for(self._vcr_request):
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/site-packages/vcr/cassette.py:263: in can_play_response_for
    request = self._before_record_request(request)
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/site-packages/vcr/config.py:223: in before_record_request
    request = copy.deepcopy(request)
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/copy.py:172: in deepcopy
    y = _reconstruct(x, memo, *rv)
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/copy.py:271: in _reconstruct
    state = deepcopy(state, memo)
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/copy.py:146: in deepcopy
    y = copier(x, memo)
/home/acme-corp/.conda/envs/apa-proxy/lib/python3.10/copy.py:231: in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
x = <generator object Client.upload_data.<locals>.json_stream at 0x7f792ac86030>
memo = {140158380145104: <[AttributeError("'Request' object has no attribute 'method'") raised in repr()] Request object at 0...', 'uri': 'http://localhost:8080/websrv/portfolios/test_cancel_task/dates?enforce-partial-import=false'}}
_nil = []
    def deepcopy(x, memo=None, _nil=[]):
        """Deep copy operation on arbitrary Python objects.
    
        See the module's __doc__ string for more info.
        """
    
        if memo is None:
            memo = {}
    
        d = id(x)
        y = memo.get(d, _nil)
        if y is not _nil:
            return y
    
        cls = type(x)
    
        copier = _deepcopy_dispatch.get(cls)
        if copier is not None:
            y = copier(x, memo)
        else:
            if issubclass(cls, type):
                y = _deepcopy_atomic(x, memo)
            else:
                copier = getattr(x, "__deepcopy__", None)
                if copier is not None:
                    y = copier(memo)
                else:
                    reductor = dispatch_table.get(cls)
                    if reductor:
                        rv = reductor(x)
                    else:
                        reductor = getattr(x, "__reduce_ex__", None)
                        if reductor is not None:
>                           rv = reductor(4)
E                           TypeError: cannot pickle 'generator' object