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Persist database regardless of notebook or script context (#2351)

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`persist()` is required even if it's invoked in a script.

Without this, an error is thrown:

```
chromadb.errors.NoIndexException: Index is not initialized
```
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Bhanu K 2023-04-04 02:51:17 +05:30 committed by GitHub
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docs/modules/indexes/vectorstores/examples/chroma.ipynb
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@ -170,12 +170,13 @@
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"### Persist the Database\n", "### Persist the Database\n",
"In a notebook, we should call persist() to ensure the embeddings are written to disk. This isn't necessary in a script - the database will be automatically persisted when the client object is destroyed." "We should call persist() to ensure the embeddings are written to disk."
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