Line magic function `%%time` not found

Question

Running this python script

%%time
train_data = dt.fread('../input/prediction/train.csv').to_pandas()

The provided output returns this error:

UsageError: Line magic function `%%time` not found. Suggest some approach.

Answer 1

%%time is a 'cell magic' and has to be the first thing in the IPython (Jupyter) cell. I can reproduce this error if for example I have a comment first. When %%time is not the first thing in the cell, IPython tries to interpret it as a 'line magic' hence the error you see.

I took a quick look in the documentation and it's not made explicitly clear there as far as I can see.

Answer 2

%%time was the first thing in the cell and after going through the documentation i found %%time is now updated with %time

Answer 3

You have to use %%time at top line of the cell in a notebook. Else it would throw the error.