def from_str()

in compute/client_library/snippets/instances/custom_machine_types/create_shared_with_helper.py [0:0]
35 lines of code
11 McCabe index (conditional complexity)

    def from_str(cls, machine_type: str):
        """
        Construct a new object from a string. The string needs to be a valid custom machine type like:
         - https://www.googleapis.com/compute/v1/projects/diregapic-mestiv/zones/us-central1-b/machineTypes/e2-custom-4-8192
         - zones/us-central1-b/machineTypes/e2-custom-4-8192
         - e2-custom-4-8192 (in this case, the zone parameter will not be set)
        """
        zone = None
        if machine_type.startswith("http"):
            machine_type = machine_type[machine_type.find("zones/") :]

        if machine_type.startswith("zones/"):
            _, zone, _, machine_type = machine_type.split("/")

        extra_mem = machine_type.endswith("-ext")

        if machine_type.startswith("custom"):
            cpu = cls.CPUSeries.N1
            _, cores, memory = machine_type.rsplit("-", maxsplit=2)
        else:
            if extra_mem:
                cpu_series, _, cores, memory, _ = machine_type.split("-")
            else:
                cpu_series, _, cores, memory = machine_type.split("-")
            if cpu_series == "n2":
                cpu = cls.CPUSeries.N2
            elif cpu_series == "n2d":
                cpu = cls.CPUSeries.N2D
            elif cpu_series == "e2":
                cpu = cls.CPUSeries.E2
                if cores == "micro":
                    cpu = cls.CPUSeries.E2_MICRO
                    cores = 2
                elif cores == "small":
                    cpu = cls.CPUSeries.E2_SMALL
                    cores = 2
                elif cores == "medium":
                    cpu = cls.CPUSeries.E2_MEDIUM
                    cores = 2
            else:
                raise RuntimeError("Unknown CPU series.")

        cores = int(cores)
        memory = int(memory)

        return cls(zone, cpu, memory, cores)