Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:
None can not be ignored in Constant(value=None). [] can not be ignored in
Tuple(elts=[]).
There is also a problem with using ast.dump() with annotate_fields=False:
>>> from ast import *
>>> dump(Raise(cause=Name(id='B', ctx=Load())), annotate_fields=False)
"Raise(Name('B', Load()))"
>>> dump(Raise(Name('B', Load())))
"Raise(exc=Name(id='B', ctx=Load()))"
For Raise(cause=X) it outputs a string which is evaluated to Raise(exc=X).
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue36287>
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