UsingAttrs

class PlasmaCalcs.tools.oop_tools.manage_attrs.UsingAttrs(obj, attrs_as_dict={}, *, _unset_sentinel=ATTR_UNSET, **attrs_and_values)

Bases: MaintainingAttrs

context manager which sets attrs of obj upon entry; restores original values upon exit.

This includes deleting any of those attrs upon exit which did not exist upon entry.

_unset_sentinel: any value, default ATTR_UNSET

upon entry, delete any attrs with value _unset_sentinel (compared via ‘is’).

E.g. UsingAttrs(obj, _unset_sentinel=None, x=None) –> del obj.x upon entry.

Methods

enter_handle_attrs()	take all steps related to attrs which should occur upon entry.
exit_handle_attrs()	take all steps related to attrs which should occur upon exit.
inside_attrs()	tells whether currently inside attrs handling for self.
obj_current_attrs()	return dict of {attr: obj.attr} for current values of attrs.

Attributes

_unset_sentinel

enter_handle_attrs()

take all steps related to attrs which should occur upon entry.

Provided separately from self.__enter__ for access to low-level functionality.

exit_handle_attrs()

take all steps related to attrs which should occur upon exit.

Provided separately from self.__exit__ for access to low-level functionality.

inside_attrs()

tells whether currently inside attrs handling for self. None if never entered; False if exited.

obj_current_attrs()

return dict of {attr: obj.attr} for current values of attrs.