Add support for list, describe, and delete namespaces in grpc (#517)

## Problem

Support for REST sync and async namespaces was added in a previous PR,
so this PR adds support for gRPC only.

## Solution

Add support for list, describe, and delete namespaces in grpc.

```python
from pinecone import Pinecone

# Initialize Pinecone client
pc = Pinecone(api_key='your-api-key')

# Get index
index = pc.Index('your-index-name')

# Example: List all namespaces (automatic pagination)
print("All namespaces:")
for namespace in index.list_namespaces():
    print(f"{namespace.name}: {namespace.record_count} records")

# Example: List namespaces with pagination control
results = index.list_namespaces_paginated(limit=10)
print(f"First 10 namespaces:")
for namespace in results.namespaces:
    print(f"{namespace.name}: {namespace.record_count} records")

# Example: Describe a specific namespace
namespace_info = index.describe_namespace(namespace='my-namespace')
print(f"Namespace '{namespace_info.name}' has {namespace_info.record_count} records")

# Example: Delete a namespace (irreversible!)
index.delete_namespace(namespace='namespace-to-delete')
```

## Type of Change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [X] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] This change requires a documentation update
- [ ] Infrastructure change (CI configs, etc)
- [ ] Non-code change (docs, etc)
- [ ] None of the above: (explain here)

## Test Plan

Added integration and unit tests

Author: rohanshah18

codegen/apis

@@ -9,4 +9,4 @@ breaking:
 deps:
   - buf.build/googleapis/googleapis
 modules:
-  - path: apis/_build/2025-01
+  - path: apis/_build/2025-04

codegen/buf.yaml

@@ -80,3 +80,14 @@ Vectors
 .. automethod:: pinecone.grpc::GRPCIndex.list
 
 .. automethod:: pinecone.grpc::GRPCIndex.list_paginated
+
+Namespaces
+----------
+
+.. automethod:: pinecone.grpc::GRPCIndex.list_namespaces
+
+.. automethod:: pinecone.grpc::GRPCIndex.list_namespaces_paginated
+
+.. automethod:: pinecone.grpc::GRPCIndex.describe_namespace
+
+.. automethod:: pinecone.grpc::GRPCIndex.delete_namespace

docs/grpc.rst

@@ -235,6 +235,42 @@ class NamespaceSummary(_message.Message):
     vector_count: int
     def __init__(self, vector_count: _Optional[int] = ...) -> None: ...
 
+class ListNamespacesRequest(_message.Message):
+    __slots__ = ("pagination_token", "limit")
+    PAGINATION_TOKEN_FIELD_NUMBER: _ClassVar[int]
+    LIMIT_FIELD_NUMBER: _ClassVar[int]
+    pagination_token: str
+    limit: int
+    def __init__(self, pagination_token: _Optional[str] = ..., limit: _Optional[int] = ...) -> None: ...
+
+class ListNamespacesResponse(_message.Message):
+    __slots__ = ("namespaces", "pagination")
+    NAMESPACES_FIELD_NUMBER: _ClassVar[int]
+    PAGINATION_FIELD_NUMBER: _ClassVar[int]
+    namespaces: _containers.RepeatedCompositeFieldContainer[NamespaceDescription]
+    pagination: Pagination
+    def __init__(self, namespaces: _Optional[_Iterable[_Union[NamespaceDescription, _Mapping]]] = ..., pagination: _Optional[_Union[Pagination, _Mapping]] = ...) -> None: ...
+
+class DescribeNamespaceRequest(_message.Message):
+    __slots__ = ("namespace",)
+    NAMESPACE_FIELD_NUMBER: _ClassVar[int]
+    namespace: str
+    def __init__(self, namespace: _Optional[str] = ...) -> None: ...
+
+class NamespaceDescription(_message.Message):
+    __slots__ = ("name", "record_count")
+    NAME_FIELD_NUMBER: _ClassVar[int]
+    RECORD_COUNT_FIELD_NUMBER: _ClassVar[int]
+    name: str
+    record_count: int
+    def __init__(self, name: _Optional[str] = ..., record_count: _Optional[int] = ...) -> None: ...
+
+class DeleteNamespaceRequest(_message.Message):
+    __slots__ = ("namespace",)
+    NAMESPACE_FIELD_NUMBER: _ClassVar[int]
+    namespace: str
+    def __init__(self, namespace: _Optional[str] = ...) -> None: ...
+
 class DescribeIndexStatsResponse(_message.Message):
     __slots__ = ("namespaces", "dimension", "index_fullness", "total_vector_count", "metric", "vector_type")
     class NamespacesEntry(_message.Message):

pinecone/core/grpc/protos/db_data_2025_01_pb2.py renamed to pinecone/core/grpc/protos/db_data_2025_04_pb2.py

@@ -51,12 +51,14 @@
 
 from pinecone.db_data.dataclasses import Vector, SparseValues
 
-from pinecone.core.grpc.protos.db_data_2025_01_pb2 import (
+from pinecone.core.grpc.protos.db_data_2025_04_pb2 import (
     Vector as GRPCVector,
     SparseValues as GRPCSparseValues,
     DeleteResponse as GRPCDeleteResponse,
 )
 
+from pinecone.core.openapi.db_data.models import ListNamespacesResponse
+
 __all__ = [
     "GRPCIndex",
     "PineconeGRPC",
@@ -67,4 +69,5 @@
     "Vector",
     "SparseValues",
     "PineconeGrpcFuture",
+    "ListNamespacesResponse",
 ]

pinecone/core/grpc/protos/db_data_2025_01_pb2.pyi renamed to pinecone/core/grpc/protos/db_data_2025_04_pb2.pyi

@@ -10,6 +10,7 @@
 from pinecone.exceptions.exceptions import PineconeException
 from grpc import CallCredentials, Compression
 from google.protobuf.message import Message
+from pinecone.openapi_support.api_version import API_VERSION
 
 
 class GrpcRunner:
@@ -21,6 +22,7 @@ def __init__(self, index_name: str, config: Config, grpc_config: GRPCClientConfi
             "api-key": config.api_key,
             "service-name": index_name,
             "client-version": CLIENT_VERSION,
+            "x-pinecone-api-version": API_VERSION,
         }
         if self.grpc_client_config.additional_metadata:
             self.fixed_metadata.update(self.grpc_client_config.additional_metadata)

pinecone/core/grpc/protos/db_data_2025_01_pb2_grpc.py renamed to pinecone/core/grpc/protos/db_data_2025_04_pb2_grpc.py

@@ -4,6 +4,7 @@
 from google.protobuf import json_format
 
 from pinecone.utils.tqdm import tqdm
+from pinecone.utils import require_kwargs
 from concurrent.futures import as_completed, Future
 
 
@@ -15,6 +16,8 @@
     parse_upsert_response,
     parse_update_response,
     parse_delete_response,
+    parse_namespace_description,
+    parse_list_namespaces_response,
 )
 from .vector_factory_grpc import VectorFactoryGRPC
 from .sparse_values_factory import SparseValuesFactory
@@ -23,9 +26,11 @@
     FetchResponse,
     QueryResponse,
     IndexDescription as DescribeIndexStatsResponse,
+    NamespaceDescription,
+    ListNamespacesResponse,
 )
 from pinecone.db_control.models.list_response import ListResponse as SimpleListResponse, Pagination
-from pinecone.core.grpc.protos.db_data_2025_01_pb2 import (
+from pinecone.core.grpc.protos.db_data_2025_04_pb2 import (
     Vector as GRPCVector,
     QueryVector as GRPCQueryVector,
     UpsertRequest,
@@ -39,10 +44,13 @@
     DeleteResponse,
     UpdateResponse,
     SparseValues as GRPCSparseValues,
+    DescribeNamespaceRequest,
+    DeleteNamespaceRequest,
+    ListNamespacesRequest,
 )
 from pinecone import Vector, SparseValues
 from pinecone.db_data.query_results_aggregator import QueryNamespacesResults, QueryResultsAggregator
-from pinecone.core.grpc.protos.db_data_2025_01_pb2_grpc import VectorServiceStub
+from pinecone.core.grpc.protos.db_data_2025_04_pb2_grpc import VectorServiceStub
 from .base import GRPCIndexBase
 from .future import PineconeGrpcFuture
 from ..db_data.types import (
@@ -54,7 +62,7 @@
 )
 
 
-__all__ = ["GRPCIndex", "GRPCVector", "GRPCQueryVector", "GRPCSparseValues"]
+__all__ = ["GRPCIndex", "GRPCVector", "GRPCQueryVector", "GRPCSparseValues", "NamespaceDescription", "ListNamespacesResponse"]
 
 _logger = logging.getLogger(__name__)
 """ :meta private: """
@@ -681,6 +689,142 @@ def describe_index_stats(
         json_response = json_format.MessageToDict(response)
         return parse_stats_response(json_response)
 
+    @require_kwargs
+    def describe_namespace(
+        self, namespace: str, **kwargs
+    ) -> NamespaceDescription:
+        """
+        The describe_namespace operation returns information about a specific namespace,
+        including the total number of vectors in the namespace.
+
+        Examples:
+
+        .. code-block:: python
+
+            >>> index.describe_namespace(namespace='my_namespace')
+
+        Args:
+            namespace (str): The namespace to describe.
+
+        Returns: NamespaceDescription object which contains information about the namespace.
+        """
+        timeout = kwargs.pop("timeout", None)
+        request = DescribeNamespaceRequest(namespace=namespace)
+        response = self.runner.run(self.stub.DescribeNamespace, request, timeout=timeout)
+        return parse_namespace_description(response)
+
+    @require_kwargs
+    def delete_namespace(
+        self, namespace: str, **kwargs
+    ) -> Dict[str, Any]:
+        """
+        The delete_namespace operation deletes a namespace from an index.
+        This operation is irreversible and will permanently delete all data in the namespace.
+
+        Examples:
+
+        .. code-block:: python
+
+            >>> index.delete_namespace(namespace='my_namespace')
+
+        Args:
+            namespace (str): The namespace to delete.
+
+        Returns: Empty dictionary indicating successful deletion.
+        """
+        timeout = kwargs.pop("timeout", None)
+        request = DeleteNamespaceRequest(namespace=namespace)
+        response = self.runner.run(self.stub.DeleteNamespace, request, timeout=timeout)
+        return parse_delete_response(response)
+
+    @require_kwargs
+    def list_namespaces_paginated(
+        self,
+        limit: Optional[int] = None,
+        pagination_token: Optional[str] = None,
+        **kwargs,
+    ) -> ListNamespacesResponse:
+        """
+        The list_namespaces_paginated operation returns a list of all namespaces in a serverless index.
+        It returns namespaces in a paginated form, with a pagination token to fetch the next page of results.
+
+        Examples:
+
+        .. code-block:: python
+
+            >>> results = index.list_namespaces_paginated(limit=10)
+            >>> [ns.name for ns in results.namespaces]
+            ['namespace1', 'namespace2', 'namespace3']
+            >>> results.pagination.next
+            eyJza2lwX3Bhc3QiOiI5OTMiLCJwcmVmaXgiOiI5OSJ9
+            >>> next_results = index.list_namespaces_paginated(limit=10, pagination_token=results.pagination.next)
+
+        Args:
+            limit (Optional[int]): The maximum number of namespaces to return. If unspecified, the server will use a default value. [optional]
+            pagination_token (Optional[str]): A token needed to fetch the next page of results. This token is returned
+                in the response if additional results are available. [optional]
+
+        Returns: ListNamespacesResponse object which contains the list of namespaces and pagination information.
+        """
+        args_dict = self._parse_non_empty_args(
+            [
+                ("limit", limit),
+                ("pagination_token", pagination_token),
+            ]
+        )
+        timeout = kwargs.pop("timeout", None)
+        request = ListNamespacesRequest(**args_dict, **kwargs)
+        response = self.runner.run(self.stub.ListNamespaces, request, timeout=timeout)
+        return parse_list_namespaces_response(response)
+
+    @require_kwargs
+    def list_namespaces(self, limit: Optional[int] = None, **kwargs):
+        """
+        The list_namespaces operation accepts all of the same arguments as list_namespaces_paginated, and returns a generator that yields
+        each namespace. It automatically handles pagination tokens on your behalf.
+
+        Args:
+            limit (Optional[int]): The maximum number of namespaces to fetch in each network call. If unspecified, the server will use a default value. [optional]
+
+        Returns:
+            Returns a generator that yields each namespace. It automatically handles pagination tokens on your behalf so you can
+            easily iterate over all results. The ``list_namespaces`` method accepts all of the same arguments as list_namespaces_paginated
+
+        Examples:
+
+        .. code-block:: python
+
+            >>> for namespace in index.list_namespaces():
+            >>>     print(namespace.name)
+            namespace1
+            namespace2
+            namespace3
+
+        You can convert the generator into a list by wrapping the generator in a call to the built-in ``list`` function:
+
+        .. code-block:: python
+
+            namespaces = list(index.list_namespaces())
+
+        You should be cautious with this approach because it will fetch all namespaces at once, which could be a large number
+        of network calls and a lot of memory to hold the results.
+        """
+        done = False
+        while not done:
+            try:
+                results = self.list_namespaces_paginated(limit=limit, **kwargs)
+            except Exception as e:
+                raise e
+
+            if results.namespaces and len(results.namespaces) > 0:
+                for namespace in results.namespaces:
+                    yield namespace
+
+            if results.pagination and results.pagination.next:
+                kwargs.update({"pagination_token": results.pagination.next})
+            else:
+                done = True
+
     @staticmethod
     def _parse_non_empty_args(args: List[Tuple[str, Any]]) -> Dict[str, Any]:
         return {arg_name: val for arg_name, val in args if val is not None}

pinecone/grpc/__init__.py

@@ -6,7 +6,7 @@
 from ..db_data import SparseValuesTypeError, SparseValuesMissingKeysError
 from ..db_data.types import SparseVectorTypedDict
 
-from pinecone.core.grpc.protos.db_data_2025_01_pb2 import SparseValues as GRPCSparseValues
+from pinecone.core.grpc.protos.db_data_2025_04_pb2 import SparseValues as GRPCSparseValues
 from pinecone.core.openapi.db_data.models import SparseValues as OpenApiSparseValues
 from pinecone import SparseValues
 

pinecone/grpc/grpc_runner.py

@@ -13,6 +13,9 @@
     IndexDescription as DescribeIndexStatsResponse,
     UpsertResponse,
     NamespaceSummary,
+    NamespaceDescription,
+    ListNamespacesResponse,
+    Pagination,
 )
 from pinecone.db_data.dataclasses import FetchResponse
 
@@ -126,3 +129,37 @@ def parse_stats_response(response: dict):
         total_vector_count=total_vector_count,
         _check_type=False,
     )
+
+
+def parse_namespace_description(response: Message) -> NamespaceDescription:
+    json_response = json_format.MessageToDict(response)
+    return NamespaceDescription(
+        name=json_response.get("name", ""),
+        record_count=json_response.get("recordCount", 0),
+        _check_type=False,
+    )
+
+
+def parse_list_namespaces_response(response: Message) -> ListNamespacesResponse:
+    json_response = json_format.MessageToDict(response)
+    
+    namespaces = []
+    for ns in json_response.get("namespaces", []):
+        namespaces.append(NamespaceDescription(
+            name=ns.get("name", ""),
+            record_count=ns.get("recordCount", 0),
+            _check_type=False,
+        ))
+    
+    pagination = None
+    if "pagination" in json_response and json_response["pagination"]:
+        pagination = Pagination(
+            next=json_response["pagination"].get("next", ""),
+            _check_type=False,
+        )
+    
+    return ListNamespacesResponse(
+        namespaces=namespaces,
+        pagination=pagination,
+        _check_type=False,
+    )

pinecone/grpc/index_grpc.py

@@ -17,7 +17,7 @@
 from ..db_data.types import VectorTuple, VectorTypedDict
 from .sparse_values_factory import SparseValuesFactory
 
-from pinecone.core.grpc.protos.db_data_2025_01_pb2 import (
+from pinecone.core.grpc.protos.db_data_2025_04_pb2 import (
     Vector as GRPCVector,
     SparseValues as GRPCSparseValues,
 )

pinecone/grpc/sparse_values_factory.py

@@ -1,9 +1,6 @@
-import os
 import time
 import logging
 
-import pytest
-
 from pinecone import NamespaceDescription
 
 logger = logging.getLogger(__name__)
@@ -43,9 +40,6 @@ def delete_all_namespaces(index):
     except Exception as e:
         logger.error(f"Error in delete_all_namespaces: {e}")
 
-@pytest.mark.skipif(
-    os.getenv("USE_GRPC") == "true", reason="Disable until grpc namespaces support is added"
-)
 class TestNamespaceOperations:
     def test_describe_namespace(self, idx):
         """Test describing a namespace"""

pinecone/grpc/utils.py

@@ -2,8 +2,8 @@
 import grpc
 import logging
 from concurrent import futures
-import pinecone.core.grpc.protos.db_data_2025_01_pb2 as pb2
-import pinecone.core.grpc.protos.db_data_2025_01_pb2_grpc as pb2_grpc
+import pinecone.core.grpc.protos.db_data_2025_04_pb2 as pb2
+import pinecone.core.grpc.protos.db_data_2025_04_pb2_grpc as pb2_grpc
 
 logger = logging.getLogger(__name__)