Serhiy Storchaka added the comment:
> Me neither, but you can't change a function that returns a list of 4-tuples
> into a function that returns a list of 5-tuples without breaking existing
> code. IIRC for struct and time tuples we created a hack in C where we
> return something that behaves like an N-tuple but has some extra attributes
> -- but I don't think collections.namedtuple supports that.
It do.
class tb_entity(namedtuple('tb_entity', 'filename lineno name line')):
def __new__(cls, filename, lineno, name, line, frame=None):
self = super().__new__(cls, filename, lineno, name, line)
self.frame = frame
return self
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<http://bugs.python.org/issue19146>
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