Path 1: 110 calls (0.5)

→ node UnaryOp (110)

3 run 3 not run

1@utils.only_required_for_messages("use-implicit-booleaness-not-len")
2    def visit_unaryop(self, node: nodes.UnaryOp) -> None:
3        """`not len(S)` must become `not S` regardless if the parent block is a test
4        condition or something else (boolean expression) e.g. `if not len(S):`.
5        """
6        if (
7            isinstance(node, nodes.UnaryOp)
8            and node.op == "not"
9            and utils.is_call_of_name(node.operand, "len")
10        ):
11            self.add_message(
12                "use-implicit-booleaness-not-len", node=node, confidence=HIGH
13            )
            

Path 2: 104 calls (0.48)

→ node UnaryOp (104)

4 run 2 not run

1@utils.only_required_for_messages("use-implicit-booleaness-not-len")
2    def visit_unaryop(self, node: nodes.UnaryOp) -> None:
3        """`not len(S)` must become `not S` regardless if the parent block is a test
4        condition or something else (boolean expression) e.g. `if not len(S):`.
5        """
6        if (
7            isinstance(node, nodes.UnaryOp)
8            and node.op == "not"
9            and utils.is_call_of_name(node.operand, "len")
10        ):
11            self.add_message(
12                "use-implicit-booleaness-not-len", node=node, confidence=HIGH
13            )
            

Path 3: 4 calls (0.02)

→ node UnaryOp (4)

6 run 0 not run

1@utils.only_required_for_messages("use-implicit-booleaness-not-len")
2    def visit_unaryop(self, node: nodes.UnaryOp) -> None:
3        """`not len(S)` must become `not S` regardless if the parent block is a test
4        condition or something else (boolean expression) e.g. `if not len(S):`.
5        """
6        if (
7            isinstance(node, nodes.UnaryOp)
8            and node.op == "not"
9            and utils.is_call_of_name(node.operand, "len")
10        ):
11            self.add_message(
12                "use-implicit-booleaness-not-len", node=node, confidence=HIGH
13            )