[pipeline]support List of Dict data (#1125)

* [CLI] add CLI launcher

* Revert "[CLI] add CLI launcher"

This reverts commit df7e650.

* [pipeline]support List of Dict data

* polish

colossalai/engine/schedule/_base_schedule.py

@@ -48,9 +48,11 @@ def _get_batch_size(self, data):
         if isinstance(data, torch.Tensor):
             return data.size(0)
         elif isinstance(data, (list, tuple)):
+            if isinstance(data[0], dict):
+                return data[0][list(data[0].keys())[0]].size(0)
             return data[0].size(0)
         elif isinstance(data, dict):
-            return data[next(data.keys())].size(0)
+            return data[list(data.keys())[0]].size(0)
 
     def load_batch(self, data_iter, to_gpu=True):
         """Loads a batch from data iterator. It returns the data and labels which are

colossalai/engine/schedule/_pipeline_schedule.py

@@ -137,6 +137,12 @@ def _get_data_slice(self, data, offset):
         if isinstance(data, torch.Tensor):
             return data[offset:offset + self.microbatch_size]
         elif isinstance(data, (list, tuple)):
+            data_dict = {}
+            for element in data:
+                if isinstance(element, dict):
+                    data_dict.update({k: v[offset:offset + self.microbatch_size] for k, v in element.items()})
+            if data_dict:
+                return data_dict
             return [val[offset:offset + self.microbatch_size] for val in data]
         elif isinstance(data, dict):
             return {k: v[offset:offset + self.microbatch_size] for k, v in data.items()}
@@ -216,7 +222,7 @@ def _get_data_label_for_current_step(self, stage_output, micro_batch_data, crite
 
                 # get all parameter names for the forward function of the model
                 fwd_sig = self._get_actual_forward_func(model)
-                fwd_sig_param_name = [p.name for p in fwd_sig.values()]
+                fwd_sig_param_name = [p.name for p in fwd_sig.parameters.values()]
 
                 # build the kwargs for the forward function
                 for idx, param_name in enumerate(fwd_sig_param_name):
@@ -228,7 +234,7 @@ def _get_data_label_for_current_step(self, stage_output, micro_batch_data, crite
 
                 # get the tensors for loss
                 loss_sig = inspect.signature(criterion)
-                loss_sig_param_name = [p.name for p in loss_sig.values()]
+                loss_sig_param_name = [p.name for p in loss_sig.parameters.values()]
 
                 for param_name in loss_sig_param_name:
                     if param_name in micro_batch_data:

colossalai/pipeline/pipelinable.py

@@ -12,7 +12,7 @@ class PipelinableContext(InsertPostInitMethodToModuleSubClasses):
     A context manager to split the model into pipeline stages.
     """
 
-    def __init__(self, policy: str="balanced"):
+    def __init__(self, policy: str = "balanced"):
         super().__init__()
         self._layer_spec_dict = {}
         self._root_children = None
@@ -61,11 +61,12 @@ def _post_init_method(self, module: torch.nn.Module, *args, **kwargs):
         """
         # iterate over the positional arguments
         # to check if an argument is a torch Module
-        # if found any torch Module, replace it with its layer spec 
+        # if found any torch Module, replace it with its layer spec
         # for storage purpose
         modified_args = []
         for arg in args:
             if isinstance(arg, torch.nn.Module):
+                # (lyl)TODO: if nn.Module is an argument of the root module, then we should just record the module instance itself.
                 arg = self._layer_spec_dict[id(arg)]
             modified_args.append(arg)
 
@@ -255,6 +256,3 @@ def forward(self, input_tensor, **kwargs):
                 input_tensor = exec_funcs_with_kwargs(self._behind_func_dict, id(module), input_tensor, kwargs)
 
         return input_tensor
-
-
-