delete()

This method deletes entities from a specified partition.

Invocation

delete(expr, timeout=None, **kwargs)

Parameters

Parameter	Description	Type	Required
expr	Boolean expression that specifies the primary keys of the entities to delete	String	True
timeout	An optional duration of time in seconds to allow for the RPC. If it is set to None, the client keeps waiting until the server responds or error occurs.	Float	False

Return

A MutationResult object.

Properties

Property	Description	Type
delete_count	Number of the entities to delete	Integer

Raises

• RpcError: error if gRPC encounter an error.
• ParamError: error if the parameters are invalid.
• BaseException: error if the return result from server is not ok.

Example

import random
data = [
  [i for i in range(2000)],
  [i for i in range(10000, 12000)],
  [[random.random() for _ in range(2)] for _ in range(2000)],
]
from pymilvus import Partition
partition = Partition("book", "novel", "")
partition.insert(data)
expr = "book_id in [0,1]"
partition.delete(expr)