How can I add a python tuple to a YAML file using pyYAML?

Question

The title is fairly self-explanatory.

When I save a tuple to a YAML file, I get something that looks like this:

ambient:  !!python/tuple [0.3, 0.3 ,0         


        

Answer 1

At least according to the PyYAML documentation:

The function yaml.safe_load limits this ability to simple Python objects like integers or lists.

The list, as you can see in the source, is somewhat more extensive but does not include tag:yaml.org,2002:python/tuple.

It appears that if you are generating a !!python/tuple type in your YAML file, you are using dump() as opposed to safe_dump(). If that's the case, you should probably switch to using load() in place of safe_load(), as files created by dump() are not guaranteed to be loadable by safe_load(). (See the description of safe_dump()).