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Article0 replies801 followingPosted 17 Jan 2026, 12:30 UTC134.7K views956 votes

Stop Writing Loops: Mastering NumPy Broadcasting for Data Normalization

Learn how NumPy broadcasting eliminates slow Python loops by virtually expanding arrays for efficient element-wise operations without wasting memory.

Community & Careers · Blog

numpy data-science

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Tasadduq Burneyowner

Started17 Jan 2026, 12:30 UTC

Level 33Owner26,525 rep points

Question1 answer· Accepted2 comments3,286 followingPosted 08 Oct 2022, 22:29 UTC122.7K views1,905 votes

Type "vector" does not exist on postgresql - langchain

I was trying to embed some documents on postgresql with the help of pgvector extension and langchain . Unfortunately I'm having trouble with the following error: (psycopg2.errors.UndefinedObject) type "vector" does not exist LINE 4: embedding VECTOR(1536), ^ [SQL: CREATE TABLE langchain_pg_embedding ( collection_id UUID, embedding VECTOR(1536), document VARC

python langchain

Rijoanul Hasan Shanto

Asked · 08 Oct 2022, 22:29 UTC

Rijoanul Hasan Shanto

answered · 13 Oct 2022, 10:29 UTC