[Python] Unable to obtain accuracy score for my linear

I am working on my regression model based on the IMDB data, to predict IMDB value. On my linear-regression, i was unable to obtain the accuracy score.

my line of code:

metrics.accuracy_score(test_y, linear_predicted_rating)


Error :

ValueError: continuous is not supported


if i were to change that line to obtain the r2 score,

metrics.r2_score(test_y,linear_predicted_rating)


i was able to obtain r2 without any error. Any clue why i am seeing this?

Thanks.

Edit: One thing i found out is test_y is panda data frame whereas the linear_predicted_rating is in numpy array format.

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