import numpy as np dtype_obj = np.dtype(np.str_) void_dtype_obj = np.dtype([("f0", np.float64), ("f1", np.float32)]) np.dtype(dtype=np.int64) np.dtype(int) np.dtype("int") np.dtype(None) np.dtype((int, 2)) np.dtype((int, (1,))) np.dtype({"names": ["a", "b"], "formats": [int, float]}) np.dtype({"names": ["a"], "formats": [int], "titles": [object]}) np.dtype({"names": ["a"], "formats": [int], "titles": [object()]}) np.dtype([("name", np.str_, 16), ("grades", np.float64, (2,)), ("age", "int32")]) np.dtype( { "names": ["a", "b"], "formats": [int, float], "itemsize": 9, "aligned": False, "titles": ["x", "y"], "offsets": [0, 1], } ) np.dtype((np.float_, float)) class Test: dtype = np.dtype(float) np.dtype(Test()) # Methods and attributes dtype_obj.base dtype_obj.subdtype dtype_obj.newbyteorder() dtype_obj.type dtype_obj.name dtype_obj.names dtype_obj * 0 dtype_obj * 2 0 * dtype_obj 2 * dtype_obj void_dtype_obj["f0"] void_dtype_obj[0] void_dtype_obj[["f0", "f1"]] void_dtype_obj[["f0"]]