Vectorize two text columns in a ColumnTransformer

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Want to vectorize two text columns in a ColumnTransformer?
You can't pass them in a list, but you can pass the vectorizer twice! (They'll learn separate vocabularies.)

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Isn't it better to create a temporary column which the concatenation of the other two, so your vectorizer will fit them together? You'll have a better chance to avoid the curse of dimensionality.

gevrapatapich