Not able to load castra files with from_castra() function of dask

Question

I am trying to replicate the example of this page about castra, dask and reddit comments, and I get the above error when I run the

dd.from_castra(data,columns)

My castra file took some hours to be created but it is clean and exactly as the tutorial mentions.

Used both my macbook and an Ubuntu instance on amazon AWS and had the same issue.

Same code and file works fine in a windows PC.

Any info could be helpful!

ValueError: Expected iterable of tuples of (name, dtype), got ['archived', 'author',....]

Answer 1

Castra was an experimental project and is no longer supported. See the README https://github.com/blaze/castra#maintenance

Answer 2

I found the solution to the problem. It was a matter of versions. If you face the same issue do the follwing:

Step 1:

Uninstall dask using pip

pip uninstall dask

Step 2:

Uninstall castra using pip

pip uninstall castra

Step 3:

Install the version of dask which is compatible with castra

pip install -Iv dask==0.10.0

Step 4:

Install castra again

pip install castra

Step 5:

After you install the correct version, check your versions with the following commands

pip show dask
pip show castra

The versions should be equal to the ones in the screenshot:

terminal screen