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Complete this python program:
def _copy_function(module_name, name=None):
assistant
#Here is the Python code you requested.

    """This will generate a function that is registered as either ``module_name``
    or ``name``. The contents of the function will be ``_run_tests``. This
    will translate the Testinfra module into a salt function and the methods
    and properties of that module will be exposed as attributes of the salt
    function that is generated. This allows for writing unit tests for a
    configured minion using states in the same way as it is configured
    Example:
    ```yaml
    minion_is_installed:
    testinfra.package:
    - name: salt-minion
    - is_installed: True
    minion_is_running:
    testinfra.service:
    - name: salt-minion
    - is_running: True
    - is_enabled: True
    file_has_contents:
    testinfra.file:
    - name: /etc/salt/minion
    - exists: True
    - contains:
    parameter: master
    expected: True
    comparison: is_
    python_is_v2:
    testinfra.package:
    - name: python
    - is_installed: True
    - version:
    expected: \2.7.9-1\
    comparison: eq
    """
    log.debug('Generating    function    for    %s    module', module_name)
    def _run_tests(name, **methods):
        success = True
        pass_msgs = []
        fail_msgs = []
        try:
            log.debug('Retrieving    %s    module.', module_name)
            mod = _get_module(module_name)
            log.debug('Retrieved    module    is    %s', mod.__dict__)
        except NotImplementedError:
            log.exception('The    %s    module    is    not    supported    for    this    backend    and/or    platform.', module_name)
            success = False
            return (success, pass_msgs, fail_msgs)
        if hasattr(inspect, 'signature'):
            mod_sig = inspect.signature(mod)
            parameters = mod_sig.parameters
        else:
            if isinstance(mod.__init__, types.MethodType):
                mod_sig = inspect.getargspec(mod.__init__)
            elif hasattr(mod, '__call__'):
                mod_sig = inspect.getargspec(mod.__call__)
            parameters = mod_sig.args
        additional_args = {}
        for arg in set(parameters).intersection(set(methods)):
            additional_args[arg] = methods.pop(arg)
        try:
            if (len(parameters) > 1):
                modinstance = mod(name, **additional_args)
            else:
                modinstance = mod()
        except TypeError:
            modinstance = None
        methods = {}
        for meth_name in methods:
            if (not meth_name.startswith('_')):
                methods[meth_name] = methods[meth_name]
        for (meth, arg) in methods.items():
            result = _get_method_result(mod, modinstance, meth, arg)
            assertion_result = _apply_assertion(arg, result)
            if (not assertion_result):
                success = False
                fail_msgs.append('Assertion    failed:    {modname}    {n}    {m}    {a}.    Actual    result:    {r}'.format(modname=module_name, n=name, m=meth, a=arg, r=result))
            else:
                pass_msgs.append('Assertion   ...