In the case no pinecone index is specified, or a wrong one is, do not
create a new one. Creating new indexes can cause unexpected costs to
users, and some code paths could cause a new one to be created on each
invocation.
This PR solves #2413.
Minor change: Currently, Pinecone is returning 5 documents instead of
the 4 seen in other vectorstores, and the comments this Pinecone script
itself. Adjusted it from 5 to 4.
Fix#1756
Use the `namespace` argument of `Pinecone.from_exisiting_index` to set
the default value of `namespace` for other methods. Leads to more
expected behavior and easier integration in chains.
For the test, I've added a line to delete and rebuild the
`langchain-demo` index at the beginning of the test. I'm not 100% sure
if it's a good idea but it makes the test reproducible.
A safe default value of batch_size is required by the pinecone python
client otherwise if the user of add_texts passes too many documents in a
single call, they would get a 400 error from pinecone.
Allow optionally specifying a list of ids for pinecone rather than
having them randomly generated.
This also permits editing the embedding/metadata of existing pinecone
entries, by id.
Peter Stolz