add amazon polarity dataset
CONTRIBUTOR
`amazon_polarity` is probably a subset of `amazon_us_reviews` but I am not entirely sure about that.
I guess `amazon_polarity` will help in reproducing results of papers using this dataset since even if it is a subset from `amazon_us_reviews`, it is not trivial how to extract `amazon_polarity` from `amazon_us_reviews`, especially since `amazon_us_reviews` was released after `amazon_polarity`. 
2020-12-11T09:54:34Z
https://github.com/huggingface/datasets/pull/1389#issuecomment-743095500
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2020-12-11T09:55:13Z
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CONTRIBUTOR
do you know what the problem would be ? should I pull the master before ? @lhoestq 
2020-12-11T10:47:23Z
https://github.com/huggingface/datasets/pull/1389#issuecomment-743121868
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2020-12-11T10:47:23Z
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MEMBER
The error just appeared on master. I will try to fix it today.
You can ignore them since it's not related to the dataset you added
2020-12-11T10:50:01Z
https://github.com/huggingface/datasets/pull/1389#issuecomment-743123084
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2020-12-11T10:50:01Z
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MEMBER
merging since the CI is fixed on master
2020-12-11T11:40:57Z
https://github.com/huggingface/datasets/pull/1389#issuecomment-743145739
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CONTRIBUTOR
Great thanks for the help. 
2020-12-11T11:45:39Z
https://github.com/huggingface/datasets/pull/1389#issuecomment-743147703
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This corresponds to the amazon (binary dataset) requested in https://github.com/huggingface/datasets/issues/353