Method update_info

pandas/io/pytables.py:2384–2413

set/update the info for this indexable with the key/value if there is a conflict raise/warn as needed

(self, info)

                )

    def update_info(self, info) -> None:
        """
        set/update the info for this indexable with the key/value
        if there is a conflict raise/warn as needed
        """
        for key in self._info_fields:
            value = getattr(self, key, None)
            idx = info.setdefault(self.name, {})

            existing_value = idx.get(key)
            if key in idx and value is not None and existing_value != value:
                # frequency/name just warn
                if key in ["freq", "index_name"]:
                    ws = attribute_conflict_doc % (key, existing_value, value)
                    warnings.warn(
                        ws, AttributeConflictWarning, stacklevel=find_stack_level()
                    )

                    # reset
                    idx[key] = None
                    setattr(self, key, None)

                else:
                    raise ValueError(
                        f"invalid info for [{self.name}] for [{key}], "
                        f"existing_value [{existing_value}] conflicts with "
                        f"new value [{value}]"
                    )
            elif value is not None or existing_value is not None:
                idx[key] = value

    def set_info(self, info) -> None:
        """set my state from the passed info"""