add files

funasr_local/optimizers/sgd.py

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+import torch
+from typeguard import check_argument_types
+
+
+class SGD(torch.optim.SGD):
+    """Thin inheritance of torch.optim.SGD to bind the required arguments, 'lr'
+
+    Note that
+    the arguments of the optimizer invoked by AbsTask.main()
+    must have default value except for 'param'.
+
+    I can't understand why only SGD.lr doesn't have the default value.
+    """
+
+    def __init__(
+        self,
+        params,
+        lr: float = 0.1,
+        momentum: float = 0.0,
+        dampening: float = 0.0,
+        weight_decay: float = 0.0,
+        nesterov: bool = False,
+    ):
+        assert check_argument_types()
+        super().__init__(
+            params,
+            lr=lr,
+            momentum=momentum,
+            dampening=dampening,
+            weight_decay=weight_decay,
+            nesterov=nesterov,
+        )