gab23r

Add assertions while piping

5

# Brief Description A feature to be able to assert dataframe while piping I would like to propose... # Example API ```python ( df .assert_(lambda d: d.A.sum()==0) .pipe(...) ) ```...

I would like to save a px.Cholorpleth figure into a static image (in png) using kaleido but it did not make it work (see below) I have pip install plotly-geo,...

inconsistency using with_columns_kwargs

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### Polars version checks - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of...

`DataFrame.join(LazyFrame)` is allowed ?

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### Research - [X] I have searched the above polars tags on Stack Overflow for similar questions. - [ ] I have asked my usage related question on [Stack Overflow](https://stackoverflow.com)....

### Problem description I wish I `flags` could roundtrip with parquet ex: ``` ( pl.DataFrame({'A' : [1,2,3]}) .with_columns(pl.col('A').set_sorted()) .write_parquet('tmp.parquet') ) pl.read_parquet('tmp.parquet')['A'].flags # Today: {'SORTED_ASC': False, 'SORTED_DESC': False} # Wish: {'SORTED_ASC':...

Same as `startswith`

I created the `iter_and_check` function, this way I can maybe refactor the `starts/ends_with` PRs

### Polars version checks - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of...

`vstack` fails because of column order but shouldn't

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### Polars version checks - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of...

### Polars version checks - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of...