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TypeError: can't pickle _abc_data objects when a class made with pyfields inherits from an ABC #84

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smarie opened this issue Jun 21, 2021 · 2 comments
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TypeError: can't pickle _abc_data objects when a class made with pyfields inherits from an ABC #84

smarie opened this issue Jun 21, 2021 · 2 comments
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@smarie
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smarie commented Jun 21, 2021

This happens when @autoclass or @autofields is used with a default value.

It seems that the _abc_data object from the ABC is mistakenly set as a field.
@smarie smarie added the bug Something isn't working label Jun 21, 2021
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smarie commented Jun 21, 2021

There are two things we can do:

  • add an exclude arg to exclude auto-fields by name
  • add a check with deepcopy(value) at class creation time and raise an error if this does not work.

smarie pushed a commit that referenced this issue Jun 21, 2021
New autocheck option in the copy_value factory, that now raise an…
1a578c6 
… error when a field definition can not be valid, because the default value can not be (deep-)copied. `@autofields` and `@autoclass` automatically benefit from this check. This will help users detect issues such as #84 earlier.
@smarie smarie closed this as completed in 517b19d Jun 21, 2021
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smarie commented Jun 21, 2021

This only happens in python 3.7+ by the way

@smarie smarie mentioned this issue Jun 21, 2021
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