dataframes

Are you using Python or Rust?

Python 3.8

What version of polars are you using?

0.10.23

What operating system are you using polars on?

Linux, Ubuntu 20.04

Describe your bug.

Unpickling a list-type series results in an error, works fine for non-list series.

What are the steps to reproduce the behavior?

import pickle
import polars as pl

Describe the bug
pa.errors.SchemaErrors.failure_cases only returns the first 10 failure_cases

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of pandera. 0.6.5
• (optional) I have confirmed this bug exists on the master branch of pandera.

Note: Please read [this guide](https://matthewrocklin.c

If I'm using a pdp.cond.Condition object, for example pdp.cond.HasAllColumns(['a', 'b']), as a precondition (or a post-condition) in my pipeline stage and it fails, I expect an informative exception message, such as "Not all required columns ['a', 'b'] found in input dataframe" (or better yet, "Required columns ['a'] not found in input dataframe", in the case only "a" is missing).

Thi

Currently we don't test (or document) that Eland should work with data streams, we should probably test that everything works properly.

Code coverage should be added to the Travis config (perhaps the cabal file and/or the stack options need to be changed in order to account for hpc coverage generation); currently in Travis there is only a project key.
This tool uploads hpc coverage reports to codecov.io .

Add a few useful date/time types from time (https://hackage.haskell.org/package/time) , e.g.

• POSIXTime
• Date
  etc.

A checklist for where to add things :

• prim constructors go in here : https://github.com/ocramz/heidi/blob/master/src/Data/Generics/Encode/Internal/Prim.hs#L25
• Heidi instances go here : https://github.com/ocramz/heidi/blob/master/src/Data/Generics