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Pandas to HDF does not support both hierarchical rows and hierarchical columns #12

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daliu87 opened this issue Jun 10, 2019 · 2 comments
Open

Pandas to HDF does not support both hierarchical rows and hierarchical columns #12

daliu87 opened this issue Jun 10, 2019 · 2 comments

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@daliu87
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daliu87 commented Jun 10, 2019

While pandas supports both hierarchical rows and columns, writing to HDF is not and it looks like this feature will not be supported anytime soon: pandas-dev/pandas#5823

All datatypes with both multi-index rows and columns should be converted to have columns be a normal index. Hierarchical columns will be represented based on column name only.
@daliu87
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daliu87 commented Jun 10, 2019

linpos is currently the only datatype this affects.

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daliu87 commented Jun 12, 2019

Solution could be to just use stack() to move column hierarchy into the index.

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