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Dont we have the constant(B0) value in summary (along with other coeficients)?

if yes,which one it is?

Great question. The OLS module in statsmodel sets B0 to 0, so it’s not used in its results.

There are exceptions though; if you read through its docs at https://www.statsmodels.org/dev/generated/statsmodels.regression.linear_model.OLS.html you can get all the details.