human
Complete the below
def _custom_getter_router(custom_getter_map, name_fn):

    ''''Creates a custom getter than matches requests to dict of custom getters.
    Custom getters are callables which implement the
    [custom getter API]
    (https://www.tensorflow.org/versions/r1.0/api_docs/python/tf/get_variable).
    The returned custom getter dispatches calls based on pattern matching the
    name of the requested variable to the keys of custom_getter_map. For example,
    ".*/w": snt.custom_getters.stop_gradient,
    will match all variables named with the suffix "/w". The `name_fn` is
    provided to allow processing of the name, such as stripping off a scope prefix
    before matching.
    Args:
    custom_getter_map: Mapping of regular expressions to custom getter
    functions.
    name_fn: Callable to map variable name through before matching to regular
    expressions. This might, for example, strip off a scope prefix.
    Returns:
    A custom getter.
    Raises:
    TypeError: If an entry in `custom_getter_map` is not a callable function.'
    '''
 What is a Python code to fix "/w"?
assistant
#Here is Python code to fix "/w".
    for custom_getter in custom_getter_map.values():
        if (not callable(custom_getter)):
            raise TypeError('Given    custom_getter    is    not    callable.')
    def _custom_getter(getter, name, *args, **kwargs):
        'A    custom    getter    that    routes    based    on    pattern    matching    the    variable    name.\n\n                Args:\n                        getter:    The    true    getter    to    call.\n                        name:    The    fully    qualified    variable    name,    i.e.    including    all    scopes.\n                        *args:    Arguments,    in    the    same    format    as    tf.get_variable.\n                        **kwargs:    Keyword    arguments,    in    the    same    format    as    tf.get_variable.\n\n                Returns:\n                        The    return    value    of    the    appropriate    custom    getter.    If    there    are    no\n                        matches,    it    returns    the    return    value    of    `getter`.\n\n                Raises:\n                        KeyError:    If    more    than    one    pattern    matches    the    variable    name.\n                '
        bare_name = name_fn(name)
        matches = [(custom_getter, pattern) for (pattern, custom_getter) in custom_getter_map.items() if (re.match(pattern, bare_name) is not None)]
        num_matches = len(matches)
        if (num_matches == 0):
            return getter(name, *args, **kwargs)
        elif (num_matches == 1):
            (custom_getter, pattern) = matches[0]
            return custom_getter(getter, name, *args, **kwargs)
        else:
            raise KeyError('More    than    one    custom_getter    matched    {}    ({}):    {}'.format(name, bare_name, [pattern for (_, pattern) in matches]))
    return _custom_getter