Malte Londschien

expect_column_mean_to_be_between expectation unsuccessful for empty DataFrame

2

**Describe the bug** The `expect_column_mean_to_be_between` expectations fails if used together with a `row_condition` that evaluates `False` for all rows. This is inconsistent with other expectations. **To Reproduce:** ``` In [1]:...

`rpy2.robjects.numpy2ri.activate` described in docs but deprecated

3

Usage of the above function is encouraged in the [docs](https://rpy2.github.io/doc/latest/html/numpy.html#from-numpy-to-rpy2). However using it raises a deprecation warning: > DeprecationWarning: The global conversion available with activate() is deprecated and will be...

Why is this limited to owned arrays here? I'd rather not need to make a copy each time I train a model. https://github.com/smartcorelib/smartcore/blob/521dab49ef92a955eb860ca195c89feab17c4b59/src/linalg/ndarray_bindings.rs#L185-L187

Predicates incorrectly keep missings for `Float64` and `Int64` dtypes for pyarrow=4

1

```python In [1]: from functools import partial ...: ...: import minimalkv ...: import numpy as np ...: import pandas as pd ...: import pyarrow as pa ...: from kartothek.io.dask.dataframe import...

Test serialization of nullable types Int64 and string

2

I'd like to add `pd.NA` here but the values are used for partitioning.

Kartothek metadata does not distinguish int64 and Int64

6

```python In [1]: from functools import partial ...: ...: import pandas as pd ...: import storefact ...: from kartothek.core.common_metadata import empty_dataframe_from_schema ...: from kartothek.io.dask.dataframe import read_dataset_as_ddf ...: from kartothek.io.eager import...

Let merge_datasets_as_delayed merge >2 datasets and filter by predicates

6

It would be nice to be able to supply `kartothek.io.dask.delayed.merge_datasets_as_delayed` with a list of `dataset_uuids` to merge an arbitrary number of datasets. This could be implemented by - defining a...

Math rendering: `{` and `}` require double escaping (`\\{` and `\\}`)

2

``` $$ S = \{ s: s \in S\} $$ ``` get's rendered as $$ S = \{ s: s \in S\} $$ (same for inline). The correct rendering is...

Blanket implementation `From<Option<T>> where T: Into<Robj>`

8

It would be nice to have a blanket implementation ```rust impl From for Robj where T: Into, { fn from(value: Option) -> Self { if let Some(some) = value {...

Returning complex objects from rust to R

9

Thanks for working on this! I am using `extendr` to write a statistical package in rust with R bindings. As part of this, I would like to return a more...