How to use the pyuvdata._miriad.hwrite function in pyuvdata

h = self.haccess(name, "write")

        if len(item_type) == 1:
            try:
                len(val)
            except TypeError:
                val = [val]

            if item_type == "a":
                offset = 0
            else:
                offset = _miriad.hwrite_init(h, item_type)

            for v in val:
                offset += _miriad.hwrite(h, offset, v, item_type)
        else:
            offset = _miriad.hwrite_init(h, "b")
            for v, t in zip(val, item_type):
                offset += _miriad.hwrite(h, offset, v, t)

        _miriad.hdaccess(h)

def _wrhd_special(self, name, val):
        """Provide write access to special header items of type '?' to _wrhd."""
        if name == "freqs":
            h = self.haccess(name, "write")
            _miriad.hwrite(h, 0, val[0], "i")
            offset = 8

            for i, v in enumerate(val[1:]):
                if i % 3 == 0:
                    _miriad.hwrite(h, offset, v, "i")
                else:
                    _miriad.hwrite(h, offset, v, "d")
                offset += 8

            _miriad.hdaccess(h)
        else:
            raise ValueError("Unknown special header: " + name)

def _wrhd_special(self, name, val):
        """Provide write access to special header items of type '?' to _wrhd."""
        if name == "freqs":
            h = self.haccess(name, "write")
            _miriad.hwrite(h, 0, val[0], "i")
            offset = 8

            for i, v in enumerate(val[1:]):
                if i % 3 == 0:
                    _miriad.hwrite(h, offset, v, "i")
                else:
                    _miriad.hwrite(h, offset, v, "d")
                offset += 8

            _miriad.hdaccess(h)
        else:
            raise ValueError("Unknown special header: " + name)

def _wrhd_special(self, name, val):
        """Provide write access to special header items of type '?' to _wrhd."""
        if name == "freqs":
            h = self.haccess(name, "write")
            _miriad.hwrite(h, 0, val[0], "i")
            offset = 8

            for i, v in enumerate(val[1:]):
                if i % 3 == 0:
                    _miriad.hwrite(h, offset, v, "i")
                else:
                    _miriad.hwrite(h, offset, v, "d")
                offset += 8

            _miriad.hdaccess(h)
        else:
            raise ValueError("Unknown special header: " + name)