# Buggy code
def has_different_config(self):
    """
    Return the list of differences between the current parameters and the existing volume.

    :return: list of options that differ
    """
    differences = []
    if (
        self.parameters.driver
        and self.parameters.driver != self.existing_volume["Driver"]
    ):
        differences.append("driver")
    if self.parameters.driver_options:
        if not self.existing_volume.get("Options"):
            differences.append("driver_options")
        else:
            for key, value in iteritems(self.parameters.driver_options):
                if (
                    not self.existing_volume["Options"].get(key)
                    or value != self.existing_volume["Options"][key]
                ):
                    differences.append("driver_options.%s" % key)
    if self.parameters.labels:
        existing_labels = self.existing_volume.get("Labels", {})
        all_labels = set(self.parameters.labels) | set(existing_labels)
        for label in all_labels:
            if existing_labels.get(label) != self.parameters.labels.get(label):
                differences.append("labels.%s" % label)

    return differences


# Traceback (TypeError)
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: TypeError: labels must be a dictionary
fatal: [victorf-C22_qa21]: FAILED! => {"changed": false, "module_stderr": "Traceback (most recent call last):\n  File \"/tmp/ansible_FZpuM7/ansible_module_docker_volume.py\", line 254, in <module>\n    main()\n  File \"/tmp/ansible_FZpuM7/ansible_module_docker_volume.py\", line 249, in main\n    cm = DockerVolumeManager(client)\n  File \"/tmp/ansible_FZpuM7/ansible_module_docker_volume.py\", line 142, in __init__\n    self.present()\n  File \"/tmp/ansible_FZpuM7/ansible_module_docker_volume.py\", line 219, in present\n    self.create_volume()\n  File \"/tmp/ansible_FZpuM7/ansible_module_docker_volume.py\", line 191, in create_volume\n    labels=self.parameters.labels)\n  File \"/usr/local/lib/python2.7/dist-packages/docker/utils/decorators.py\", line 35, in wrapper\n    return f(self, *args, **kwargs)\n  File \"/usr/local/lib/python2.7/dist-packages/docker/api/volume.py\", line 32, in create_volume\n    raise TypeError('labels must be a dictionary')\nTypeError: labels must be a dictionary\n", "module_stdout": "", "msg": "MODULE FAILURE", "rc": 1}

# Fixed code
def has_different_config(self):
    """
    Return the list of differences between the current parameters and the existing volume.

    :return: list of options that differ
    """
    differences = []
    if (
        self.parameters.driver
        and self.parameters.driver != self.existing_volume["Driver"]
    ):
        differences.append("driver")
    if self.parameters.driver_options:
        if not self.existing_volume.get("Options"):
            differences.append("driver_options")
        else:
            for key, value in iteritems(self.parameters.driver_options):
                if (
                    not self.existing_volume["Options"].get(key)
                    or value != self.existing_volume["Options"][key]
                ):
                    differences.append("driver_options.%s" % key)
    if self.parameters.labels:
        existing_labels = self.existing_volume.get("Labels", {})
        for label in self.parameters.labels:
            if existing_labels.get(label) != self.parameters.labels.get(label):
                differences.append("labels.%s" % label)

    return differences