human
I wrote the below code

    initialized_variable_scopes = weakref.WeakKeyDictionary()
    arg_spec = inspect.getargspec(method)
    is_method = (arg_spec.args and (arg_spec.args[0] == 'self'))
    if (not is_method):
        raise TypeError('reuse_variables    can    only    be    used    with    methods.')
    @functools.wraps(method)
    def wrapper(obj, *args, **kwargs):
        'Calls    `method`    with    a    variable    scope    whose    reuse    flag    is    set    correctly.\n\n                The    first    time    the    wrapper    is    called    it    creates    a\n                `(tf.Graph,    tf.VariableScope)`    key    and    checks    it    for    membership    in\n                `initialized_variable_scopes`.    The    check    is    `False`    if    and    only    if    this    is\n                the    first    time    the    wrapper    has    been    called    with    the    key,    otherwise    the\n                check    is    `True`.    The    result    of    this    check    is    used    as    the    `reuse`    flag    for\n                entering    the    provided    variable    scope    before    calling    `method`.\n\n                Here    are    two    examples    of    how    to    use    the    reuse_variables    decorator.\n\n                1.    Decorate    an    arbitrary    instance    method    with    a    `variable_scope`    attribute:\n\n                        ```python\n                        class    Reusable(object):\n\n                                def    __init__(self,    name):\n                                        with    tf.variable_scope(name)    as    vs:\n                                                self.variable_scope    =    vs\n\n                                @snt.reuse_variables\n                                def    add_a(self,    input_tensor):\n                                        a    =    tf.get_variable("a",    shape=input_tensor.get_shape())\n                                        return    a    +    input_tensor\n\n                       ...

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def reuse_variables(method):