human
I wrote the below code

    if (maxval_limit is None):
        maxval_limit = 10
    if assert_32bit:
        def new_get_index_dtype(arrays=(), maxval=None, check_contents=False):
            tp = get_index_dtype(arrays, maxval, check_contents)
            assert_equal(np.iinfo(tp).max, np.iinfo(np.int32).max)
            assert_(((tp == np.int32) or (tp == np.intc)))
            return tp
    elif (fixed_dtype is not None):
        def new_get_index_dtype(arrays=(), maxval=None, check_contents=False):
            return fixed_dtype
    elif random:
        counter = np.random.RandomState(seed=1234)
        def new_get_index_dtype(arrays=(), maxval=None, check_contents=False):
            return (np.int32, np.int64)[counter.randint(2)]
    else:
        def new_get_index_dtype(arrays=(), maxval=None, check_contents=False):
            dtype = np.int32
            if (maxval is not None):
                if (maxval > maxval_limit):
                    dtype = np.int64
            for arr in arrays:
                arr = np.asarray(arr)
                if (arr.dtype > np.int32):
                    if check_contents:
                        if (arr.size == 0):
                            continue
                        elif np.issubdtype(arr.dtype, np.integer):
                            maxval = arr.max()
                            minval = arr.min()
                            if ((minval >= (- maxval_limit)) and (maxval <= maxval_limit)):
                                continue
                    dtype = np.int64
            return dtype
    if (downcast_maxval is not None):
        def new_downcast_intp_index(arr):
            if (arr.max() > downcast_maxval):
                raise AssertionError('downcast    limited')
            return arr.astype(np.intp)
    @decorator
    def deco(func, *a, **kw):
        backup = []
        modules = [scipy.sparse.bsr, scipy.sparse.coo, scipy.sparse.csc, scipy.sparse.csr, scipy.sparse.dia, scipy.sparse.dok, scipy.sparse.lil, scipy.sparse.sputils, scipy.sparse.compressed,...

What's a good function header?

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

def with_64bit_maxval_limit(maxval_limit=None, random=False, fixed_dtype=None, downcast_maxval=None, assert_32bit=False):