Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

The following Table formats cannot serialize `None`

See original GitHub issue

Description

Formats: asdf, fits (?), ~hdf5~ (has no NULL)

Expected behavior

None should be able to be written (and read).

Actual behavior

They raise various errors complaining about serialization.

Steps to Reproduce

asdf

t = table.Table(dict(a=[0], b=[None]))
t.write("temp.asdf", format="asdf", overwrite=True)

… ValueError: Unknown dtype object

fits

t = table.Table(dict(a=[0], b=[None]))
t.write("temp.fits", format="fits", overwrite=True)

… ValueError: Illegal format object.

hdf5

t = table.Table(dict(a=[0], b=[None]))
t.write("temp.hdf5", format="hdf5", overwrite=True)

… TypeError: Object dtype dtype(‘O’) has no native HDF5 equivalent

System Details

macOS-10.16-x86_64-i386-64bit Python 3.8.2 | packaged by conda-forge | (default, Apr 24 2020, 07:56:27) [Clang 9.0.1 ] Numpy 1.18.4 astropy 4.3.dev1486+gddc6fb76f.d20210505 Scipy 1.4.1 Matplotlib 3.4.1

Issue Analytics

State:
Created 2 years ago
Comments:14 (14 by maintainers)

Top GitHub Comments

2reactions

pllimcommented, May 11, 2021

What’s wrong with the good ol’ -999?

1reaction

nstarmancommented, Aug 31, 2021

I suppose we can close this. The problems remain, but I think it’s a won't-fix since the underlying formats don’t support the serialization.

Top Results From Across the Web

TypeError: cannot serialize x.x (type float) (Elementtree)

Interesting. I see that it is not going to work with a float because the _escape_cdata function uses the in operator ( if...

Service Update 10 for Microsoft Dynamics 365 9.0.2

When attempting to load a form in UCI, the following error occurs: "Cannot serialize a request with no attribute metadata". Removing and re-adding...

Serialization — Ray 2.2.0 - the Ray documentation

You can often avoid serialization issues by using only native types (e.g., numpy arrays or lists/dicts of numpy arrays and other primitive types),...

Script serialization - Unity - Manual

Serialization is the automatic process of transforming data structures or GameObject states into a format that Unity can store and reconstruct later.

Parameter Serialization - Swagger

The following table shows how OpenAPI keywords are mapped to the URI Template modifiers. Keyword, URI Template Modifier. style: simple, none. style: label...