qiskit/transpiler/coupling.py
def is_connected(self):
        """
        Test if the graph is connected.

        Return True if connected, False otherwise
        """
        try:
            return nx.is_weakly_connected(self.graph)
        except nx.exception.NetworkXException:
            return False
def is_connected(self):
        """
        Test if the graph is connected.

        Return True if connected, False otherwise
        """
        try:
            return nx.is_weakly_connected(self.graph)
        except nx.exception.NetworkXException:
            return False
Test if the graph is connected.

        Return True if connected, False otherwise