Top koalas issues

Does koalas groupby preserve the order appeared in the original dataframe like pandas?

question

Does spark DataFrame.limit guarantees any order?

discussions question

ks.groupby won't drop groups with one or more null keys

bug

String concatenation does not work correctly

bug

Fails to read from parquet table with flat schema and fields containing "."

P0 bug

Inline method docs, rather than using "derived_from"

P0 good first issue help wanted