code: def _initialize(cls):
      
      op_symbols = """
        + add radd pos
        - sub rsub neg
        * mul rmul
        / truediv rtruediv
        // floordiv rfloordiv
        % mod rmod
        ** pow rpow
        >> rshift rrshift
        << lshift rlshift
        ~ invert
        & and rand
        | or ror
        ^ xor rxor
        < lt
        <= le
        == eq
        != ne
        > gt
        >= ge
      """.strip().splitlines()
      if HAS_MATMUL:
        op_symbols.append("@ matmul rmatmul")
      for op_line in op_symbols:
        symbol, names = op_line.split(None, 1)
        for name in names.split():
          cls._insert(name, symbol)
docs: Internal method to initialize the class by creating all
      the operator metadata to be used afterwards.