type hints in Params4bit constructors

bitsandbytes/nn/modules.py

@@ -2,7 +2,7 @@
 #
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
-from typing import Optional, TypeVar, Union, overload
+from typing import Any, Dict, Optional, TypeVar, Union, overload
 
 import warnings
 import torch
@@ -142,7 +142,7 @@ class Embedding(torch.nn.Embedding):
 
 class Params4bit(torch.nn.Parameter):
 
-    def __new__(cls, data=None, requires_grad=True, quant_state=None, blocksize=64, compress_statistics=True, quant_type='fp4'):
+    def __new__(cls, data: Optional[torch.Tensor] = None, requires_grad=True, quant_state: QuantState = None, blocksize: int = 64, compress_statistics: bool = True, quant_type: str = 'fp4') -> "Params4bit":
         if data is None:
             data = torch.empty(0)
 
@@ -155,7 +155,7 @@ class Params4bit(torch.nn.Parameter):
         return self
 
     @classmethod
-    def from_prequantized(cls, data, quantized_stats, requires_grad=False, device='cuda', **kwargs):
+    def from_prequantized(cls, data: torch.Tensor, quantized_stats: Dict[str, Any], requires_grad: bool = False, device='cuda', **kwargs) -> "Params4bit":
         self = torch.Tensor._make_subclass(cls, data.to(device))
         self.requires_grad = requires_grad
         self.quant_state = QuantState.from_dict(qs_dict=quantized_stats, device=device)