while trying to create index from nodes

At a glance

The community member is encountering a TypeError when trying to create a VectorStoreIndex from a set of nodes. The error suggests that the nodes parameter is not a list, but rather a dict_values object, which is not subscriptable. Several community members suggest that the issue is not related to the number of documents, but rather a type issue with the nodes parameter. The solution provided is to explicitly convert the nodes to a list using list(nodes) before passing it to the VectorStoreIndex constructor.

aanupamaze

while trying to create index from nodes

running into this error when no of documents is more

TypeError Traceback (most recent call last)
Input In [11], in <cell line: 1>()
----> 1 index = VectorStoreIndex(nodes, service_context=service_context)
2 index.storagecontext.persist("./storageall"+str(len(documents)))

File ~/anaconda3/lib/python3.9/site-packages/llama_index/indices/vector_store/base.py:52, in VectorStoreIndex.init(self, nodes, index_struct, service_context, storage_context, use_async, store_nodes_override, insert_batch_size, show_progress, kwargs) 50 self._store_nodes_override = store_nodes_override 51 self._insert_batch_size = insert_batch_size---> 52 super().init( 53 nodes=nodes, 54 index_struct=index_struct, 55 service_context=service_context, 56 storage_context=storage_context, 57 show_progress=show_progress, 58 kwargs,
59 )

File ~/anaconda3/lib/python3.9/site-packages/llama_index/indices/base.py:51, in BaseIndex.init(self, nodes, index_struct, storage_context, service_context, show_progress, **kwargs)
49 raise ValueError("Only one of nodes or index_struct can be provided.")
50 # This is to explicitly make sure that the old UX is not used
---> 51 if nodes is not None and len(nodes) >= 1 and not isinstance(nodes[0], BaseNode):
52 if isinstance(nodes[0], Document):
53 raise ValueError(
54 "The constructor now takes in a list of Node objects. "
55 "Since you are passing in a list of Document objects, "
56 "please use from_documents instead."
57 )

TypeError: 'dict_values' object is not subscriptable

15 comments

LLogan M

whoops, should be list(index.docstore.docs.values)

LLogan M

classic python being silly

aanupamaze

anything that i need to do at my end?

LLogan M

It's complaining that nodes is not a list

LLogan M

so you probably need to do list(nodes)

aanupamaze

but this error is not thrown when no of docs is lower

LLogan M

It's unrelated to the number of docs

LLogan M

this is merely a type issue

LLogan M

and related to how you are getting the nodes

aanupamaze

but i dont see this error when no of nodes is lower, i mean i dont have to typecast it to list

LLogan M

hard to say without seeing your code, but I can say almost 100% its not related to the number of nodes.

The error is on this line
if nodes is not None and len(nodes) >= 1 and not isinstance(nodes[0], BaseNode):

And the error is
TypeError: 'dict_values' object is not subscriptable

This would only happen if the nodes passed in has type dict_values instead of list

LLogan M

index = VectorStoreIndex(list(nodes), service_context=service_context)

LLogan M

Make the change above, it will work

aanupamaze

no problem..i will keep it list(nodes) going forward

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while trying to create index from nodes