# TypeError: struct() got multiple values for keyword argument 'AC' when updating matrix table with annotate\_rows **URL:** \ **Category:** Hail Query & hailctl\ **Created:** [November 6, 2020, 2:28pm UTC](https://discuss.hail.is/t/typeerror-struct-got-multiple-values-for-keyword-argument-ac-when-updating-matrix-table-with-annotate-rows/1775 "2020-11-06T14:28:39Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![antoine-fav](https://avatars.discourse-cdn.com/v4/letter/a/f6c823/32.png) [@antoine-fav](https://discuss.hail.is/u/antoine-fav)\ **Post date:** [November 6, 2020, 2:28pm UTC](https://discuss.hail.is/t/typeerror-struct-got-multiple-values-for-keyword-argument-ac-when-updating-matrix-table-with-annotate-rows/1775/1 "2020-11-06T14:28:39Z")
Dear hail team, I hope this question has not been posted yet, I can’t find the answer at least. I am trying to get familiar with hail by filtering and doing simple stuff I usually do on VCFs with softwares like bcftools. I am working with Hail version 0.2.57-582b2e31b8bd I splitted my VCF from multiallelic to biallelic with: `data_tmp_bi = hl.split_multi_hts(data_tmp)` Then I want to update the allele counts the same way as what I saw in your documentation: `data_tmp_bi = data_tmp_bi.annotate_rows(info = hl.struct(AC=data_tmp_bi.info.AC[data_tmp_bi.a_index - 1],**data_tmp_bi.info))` but I get this error: ```auto File "", line 1, in data_tmp_bi = data_tmp_bi.annotate_rows(info = hl.struct(AC=data_tmp_bi.info.AC[data_tmp_bi.a_index - 1],**data_tmp_bi.info)) TypeError: struct() got multiple values for keyword argument 'AC' ``` The workaround I have been using is then to create a new info field called ‘AC2’, to then drop the ‘AC’ field and then recreate the ‘AC’ field with `annotate_rows` with to finally drop ‘AC2’. Which is a long workaround: ```auto data_tmp_bi = data_tmp_bi.annotate_rows(info = hl.struct(AC2=data_tmp_bi.info.AC[data_tmp_bi.a_index - 1],**data_tmp_bi.info)) data_tmp_bi = data_tmp_bi.annotate_rows(info=data_tmp_bi.info.drop('AC')) data_tmp_bi = data_tmp_bi.annotate_rows(info = hl.struct(AC=data_tmp_bi.info.AC2, **data_tmp_bi.info)) data_tmp_bi = data_tmp_bi.annotate_rows(info=data_tmp_bi.info.drop('AC2')) ``` On top of this, I filter by column some samples with `filter_cols` , so then, I want to update fields like allele count again, so I would still need to use the same workaround as above, otherwise I get the same error. Do you have an idea of what the problem might be? Or a better way of doing this than what I am using? ---
**Author:** ![johnc1231](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/johnc1231/32/286_2.png) [@johnc1231](https://discuss.hail.is/u/johnc1231)\ **Post date:** [November 6, 2020, 2:39pm UTC](https://discuss.hail.is/t/typeerror-struct-got-multiple-values-for-keyword-argument-ac-when-updating-matrix-table-with-annotate-rows/1775/2 "2020-11-06T14:39:17Z")
So the problem here is that `**data_tmp_bi.info` is a struct that contains `AC`. So in this line: ```auto data_tmp_bi = data_tmp_bi.annotate_rows(info = hl.struct(AC=data_tmp_bi.info.AC[data_tmp_bi.a_index - 1],**data_tmp_bi.info)) ``` you’re saying "Make a struct called info, with a field called AC, and all of the old fields from `data_tmp_bi.info`". Since one of the old fields is `AC`, you’re defining `AC` twice, which isn’t allowed. If your goal is “Keep the rest of the info struct the same, just change the AC field”, the easiest way to do that is probablly to do: ```auto data_tmp_bi = data_tmp_bi.annotate_rows(info = data_tmp_bi.info.annotate(AC=data_tmp_bi.info.AC[data_tmp_bi.a_index - 1]))) ``` That says "The new `info` field is determined by taking the old `info` field and overwriting `AC` ---
**Author:** ![antoine-fav](https://avatars.discourse-cdn.com/v4/letter/a/f6c823/32.png) [@antoine-fav](https://discuss.hail.is/u/antoine-fav)\ **Post date:** [November 6, 2020, 2:53pm UTC](https://discuss.hail.is/t/typeerror-struct-got-multiple-values-for-keyword-argument-ac-when-updating-matrix-table-with-annotate-rows/1775/3 "2020-11-06T14:53:37Z")
Alright I get the problem, thank you very much, it works perfectly this way! However, in the `split_multi_hts` documentation ([https://hail.is/docs/0.2/methods/genetics.html#hail.methods.split\_multi\_hts](https://hail.is/docs/0.2/methods/genetics.html#hail.methods.split_multi_hts)) what is written is the solution I tried, which is why I got confused. ---
**Author:** ![johnc1231](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/johnc1231/32/286_2.png) [@johnc1231](https://discuss.hail.is/u/johnc1231)\ **Post date:** [November 6, 2020, 2:56pm UTC](https://discuss.hail.is/t/typeerror-struct-got-multiple-values-for-keyword-argument-ac-when-updating-matrix-table-with-annotate-rows/1775/4 "2020-11-06T14:56:32Z")
Thanks for bringing that to my attention, let me go look into that and see why that’s there. Theoretically, when the website gets generated all of our examples in the documentation should get tested, so not sure what’s going on there. ---
**Author:** ![johnc1231](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/johnc1231/32/286_2.png) [@johnc1231](https://discuss.hail.is/u/johnc1231)\ **Post date:** [November 6, 2020, 3:46pm UTC](https://discuss.hail.is/t/typeerror-struct-got-multiple-values-for-keyword-argument-ac-when-updating-matrix-table-with-annotate-rows/1775/5 "2020-11-06T15:46:14Z")
For some reason, this example in our documents was marked to not be tested. You’re right that it was incorrect, and it should be resolved next time we release a version of hail and update our site. Fix here: >