管理命名空间
了解如何使用命名空间在单个 Pinecone 索引中划分数据，以便更好地组织数据。
管理命名空间 是 CoddyKit 上的免费 Vector Databases: Pinecone, Weaviate & pgvector 课时。 这是第 2 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Vector Databases: Pinecone, Weaviate & pgvector 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Vector Databases: Pinecone, Weaviate & pgvector 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
What are Pinecone Namespaces?
Welcome to managing namespaces in Pinecone! A namespace is like a logical partition within a single Pinecone index.
Think of it as a folder inside a main directory. It allows you to segment your data without needing to create entirely separate indexes.
Why Use Namespaces?
Namespaces are incredibly useful for organizing your vector data, especially in complex applications:
- Multi-tenancy: Isolate data for different users or customers within one index.
- A/B Testing: Store different versions of embeddings for experiments.
- Data Isolation: Keep distinct datasets separate while leveraging the same index infrastructure.
- Categorization: Group vectors by topic, source, or type.
The Default Namespace
Every Pinecone index has a default namespace. If you don't explicitly specify a namespace when upserting or querying, your operations will interact with this default namespace.
It's often represented by an empty string "" or simply by omitting the namespace parameter.
Setting Up for Namespaces
Before we work with namespaces, ensure your Pinecone client is initialized. We'll assume you have your API key and environment configured, typically via environment variables.
Here's a basic setup for demonstration:
from pinecone import Pinecone
import os
def main():
# Replace with your actual API key and environment from environment variables
api_key = os.environ.get("PINECONE_API_KEY", "YOUR_API_KEY")
environment = os.environ.get("PINECONE_ENVIRONMENT", "YOUR_ENVIRONMENT")
if api_key == "YOUR_API_KEY" or environment == "YOUR_ENVIRONMENT":
print("Please set PINECONE_API_KEY and PINECONE_ENVIRONMENT env vars.")
return
pc = Pinecone(api_key=api_key, environment=environment)
print("Pinecone client initialized.")
if __name__ == "__main__":
main()Upserting Data into a Namespace
To add vectors to a specific namespace, you simply include the namespace parameter in your index.upsert() call.
This example upserts a few vectors into a namespace called "product-recommendations".
from pinecone import Pinecone, Index
import os
def main():
api_key = os.environ.get("PINECONE_API_KEY", "YOUR_API_KEY")
environment = os.environ.get("PINECONE_ENVIRONMENT", "YOUR_ENVIRONMENT")
if api_key == "YOUR_API_KEY" or environment == "YOUR_ENVIRONMENT":
print("Please set PINECONE_API_KEY and PINECONE_ENVIRONMENT env vars.")
return
pc = Pinecone(api_key=api_key, environment=environment)
index_name = "my-product-index" # Ensure this index exists
if index_name not in pc.list_indexes():
print(f"Index '{index_name}' does not exist. Please create it first.")
return
index = pc.Index(index_name)
vectors_to_upsert = [
{"id": "item-1", "values": [0.1, 0.2, 0.3]}, # 3 dimensions for example
{"id": "item-2", "values": [0.4, 0.5, 0.6]}
]
# Upsert into a specific namespace
index.upsert(vectors=vectors_to_upsert, namespace="product-recommendations")
print("Vectors upserted into 'product-recommendations' namespace.")
if __name__ == "__main__":
main()Querying a Specific Namespace
When you want to retrieve vectors from a particular namespace, you also specify the namespace parameter in your index.query() call.
This ensures your search is confined to that segment of your index.
from pinecone import Pinecone, Index
import os
def main():
api_key = os.environ.get("PINECONE_API_KEY", "YOUR_API_KEY")
environment = os.environ.get("PINECONE_ENVIRONMENT", "YOUR_ENVIRONMENT")
if api_key == "YOUR_API_KEY" or environment == "YOUR_ENVIRONMENT":
print("Please set PINECONE_API_KEY and PINECONE_ENVIRONMENT env vars.")
return
pc = Pinecone(api_key=api_key, environment=environment)
index_name = "my-product-index"
if index_name not in pc.list_indexes():
print(f"Index '{index_name}' does not exist. Please create it first.")
return
index = pc.Index(index_name)
query_vector = [0.15, 0.25, 0.35] # Example query vector
# Query within the 'product-recommendations' namespace
results = index.query(
vector=query_vector,
top_k=2,
namespace="product-recommendations",
include_values=False
)
print("Query results from 'product-recommendations' namespace:")
for match in results.matches:
print(f"ID: {match.id}, Score: {match.score}")
if __name__ == "__main__":
main()Understanding Query Scope
It's crucial to remember that queries in Pinecone are namespace-specific by default. If you query without specifying a namespace, it will only search the default namespace.
There's no direct way to query across all namespaces with a single API call; you'd need to query each namespace individually if you wanted to combine results.
Listing Namespaces in an Index
To see which namespaces currently exist in your index and their statistics, you can use the index.describe_index_stats() method.
This returns a summary including a map of namespaces and their vector counts.
from pinecone import Pinecone, Index
import os
def main():
api_key = os.environ.get("PINECONE_API_KEY", "YOUR_API_KEY")
environment = os.environ.get("PINECONE_ENVIRONMENT", "YOUR_ENVIRONMENT")
if api_key == "YOUR_API_KEY" or environment == "YOUR_ENVIRONMENT":
print("Please set PINECONE_API_KEY and PINECONE_ENVIRONMENT env vars.")
return
pc = Pinecone(api_key=api_key, environment=environment)
index_name = "my-product-index"
if index_name not in pc.list_indexes():
print(f"Index '{index_name}' does not exist. Please create it first.")
return
index = pc.Index(index_name)
# Get index statistics
index_stats = index.describe_index_stats()
print("Namespaces in index:")
for ns, stats in index_stats.namespaces.items():
print(f"- Namespace: '{ns}', Vector Count: {stats.vector_count}")
if __name__ == "__main__":
main()Deleting Vectors from a Namespace
You can delete specific vectors from a namespace by providing their IDs along with the namespace parameter to index.delete().
This example deletes a specific item from the "product-recommendations" namespace.
from pinecone import Pinecone, Index
import os
def main():
api_key = os.environ.get("PINECONE_API_KEY", "YOUR_API_KEY")
environment = os.environ.get("PINECONE_ENVIRONMENT", "YOUR_ENVIRONMENT")
if api_key == "YOUR_API_KEY" or environment == "YOUR_ENVIRONMENT":
print("Please set PINECONE_API_KEY and PINECONE_ENVIRONMENT env vars.")
return
pc = Pinecone(api_key=api_key, environment=environment)
index_name = "my-product-index"
if index_name not in pc.list_indexes():
print(f"Index '{index_name}' does not exist. Please create it first.")
return
index = pc.Index(index_name)
# Delete a specific vector by ID within a namespace
index.delete(ids=["item-1"], namespace="product-recommendations")
print("Vector 'item-1' deleted from 'product-recommendations' namespace.")
if __name__ == "__main__":
main()Deleting an Entire Namespace
To remove all vectors within a specific namespace, effectively deleting the namespace itself, you can use index.delete() with the namespace parameter and set delete_all=True.
Be careful: This action is irreversible and deletes all data in that namespace!
from pinecone import Pinecone, Index
import os
def main():
api_key = os.environ.get("PINECONE_API_KEY", "YOUR_API_KEY")
environment = os.environ.get("PINECONE_ENVIRONMENT", "YOUR_ENVIRONMENT")
if api_key == "YOUR_API_KEY" or environment == "YOUR_ENVIRONMENT":
print("Please set PINECONE_API_KEY and PINECONE_ENVIRONMENT env vars.")
return
pc = Pinecone(api_key=api_key, environment=environment)
index_name = "my-product-index"
if index_name not in pc.list_indexes():
print(f"Index '{index_name}' does not exist. Please create it first.")
return
index = pc.Index(index_name)
# Delete all vectors within a specific namespace
# This effectively removes the 'test-namespace' and all its contents
index.delete(namespace="test-namespace", delete_all=True)
print("All vectors in 'test-namespace' deleted. Namespace effectively removed.")
if __name__ == "__main__":
main()Namespace Knowledge Check
You have an index named "my-app-index". You upsert vectors into "user-1" and "user-2" namespaces. If you then call index.query(vector=my_vec, top_k=5) without specifying a namespace, what will happen?
Recap: Organize with Namespaces
Great job! You've learned about the power of Pinecone namespaces.
- Namespaces help segment data within a single index.
- They're perfect for multi-tenancy and A/B testing.
- Operations (upsert, query, delete) are namespace-specific.
- The default namespace is used if none is specified.
- You can list existing namespaces and delete entire namespaces.
Using namespaces effectively keeps your vector data organized and manageable!
常见问题解答
「管理命名空间」课时是免费的吗？
是的 — 「管理命名空间」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Vector Databases: Pinecone, Weaviate & pgvector 课程的其余内容，请升级到 CoddyKit PRO。 Vector Databases: Pinecone, Weaviate & pgvector 课程共包含 4 节课。
「管理命名空间」这节课中我会学到什么？
了解如何使用命名空间在单个 Pinecone 索引中划分数据，以便更好地组织数据。 你通过在浏览器中直接运行的动手代码来练习 Vector Databases: Pinecone, Weaviate & pgvector，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Vector Databases: Pinecone, Weaviate & pgvector 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Vector Databases: Pinecone, Weaviate & pgvector 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 2 节课，共 4 节。
「管理命名空间」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Vector Databases: Pinecone, Weaviate & pgvector 课中编写并运行代码吗？
能。每节 Vector Databases: Pinecone, Weaviate & pgvector 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。