We rapidly improved and added new functionalities in the past week. We also added the following features:
koalas.DataFrame:
diff (#562)
shift (#562)
round (#537)
rank (#546)
any (#568)
all (#568)
koalas.Series:
diff (#564)
quantile (#566)
shift (#563)
is_monotonic (#560)
is_monotonic_increasing (#560)
is_monotonic_decreasing (#560)