The difference between [['column']] and [''column"] Cross Validation(2/10)

Q&A
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#1

test_one[“predicted_price”] = model.predict(test_one[[“accommodates”]])
Screen Link:


My Code:

model.predict(test_one[“accommodates”])
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What I expected to happen:


What actually happened:

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I can't make out why they used double brackets[[]] instead of single [].
#2

There are some existing posts which should help answer your question such as my answer here - Why double brackets? is applicable to your question as well.