Predicate iterableUnpackingElementReadStep
Step 5
For a sequence node inside an iterable unpacking, data flows from the sequence to its elements. There are
three cases for what toNode should be:
a) If the element is a plain variable, toNode is the corresponding control flow node.
b) If the element is itself a sequence, with control-flow node `seq`, `toNode` is `TIterableSequence(seq)`.
c) If the element is a starred variable, with control-flow node `v`, `toNode` is `TIterableElement(v)`.
Import path
import semmle.python.dataflow.new.internal.IterableUnpackingpredicate iterableUnpackingElementReadStep(Node nodeFrom, Content c, Node nodeTo)