diff --git a/fastNLP/core/__init__.py b/fastNLP/core/__init__.py
index 1501851d..f1421c38 100644
--- a/fastNLP/core/__init__.py
+++ b/fastNLP/core/__init__.py
@@ -59,6 +59,7 @@ __all__ = [
     # log
     "logger"
 
+    # 
 ]
 from .callbacks import *
 from .collators import *
diff --git a/fastNLP/core/callbacks/has_monitor_callback.py b/fastNLP/core/callbacks/has_monitor_callback.py
index 52214ff0..c5c5edde 100644
--- a/fastNLP/core/callbacks/has_monitor_callback.py
+++ b/fastNLP/core/callbacks/has_monitor_callback.py
@@ -161,7 +161,6 @@ class MonitorUtility:
         return monitor_name
 
 
-
 class HasMonitorCallback(MonitorUtility, Callback):
     def __init__(self, monitor, larger_better, must_have_monitor=False):
         """
diff --git a/fastNLP/core/collators/padders/get_padder.py b/fastNLP/core/collators/padders/get_padder.py
index 8bc05ff9..1df0c0d8 100644
--- a/fastNLP/core/collators/padders/get_padder.py
+++ b/fastNLP/core/collators/padders/get_padder.py
@@ -7,7 +7,7 @@ from fastNLP.core.log import logger
 from .padder import Padder, NullPadder
 from .numpy_padder import NumpyNumberPadder, NumpySequencePadder, NumpyTensorPadder
 from .torch_padder import TorchNumberPadder, TorchSequencePadder, TorchTensorPadder
-from .raw_padder import RawNumberPadder, RawSequencePadder
+from .raw_padder import RawNumberPadder, RawSequencePadder, RawTensorPadder
 from .paddle_padder import PaddleTensorPadder, PaddleSequencePadder, PaddleNumberPadder
 from .exceptions import *
 
@@ -23,7 +23,7 @@ def get_padder(batch_field:Sequence[Any], pad_val, dtype, backend, field_name)->
     :param field_name: 方便报错的。
     :return:
     """
-
+    assert len(batch_field)!=0, "Empty batch encountered."
     logger.debug(f"The content in the field:`{field_name}` is:\n" + str(batch_field))
     if pad_val is None:
         logger.debug(f"The pad_val for field:{field_name} is None, not padding this field.")
@@ -63,7 +63,10 @@ def get_padder(batch_field:Sequence[Any], pad_val, dtype, backend, field_name)->
         return NullPadder()
 
     # 再检查所有的元素 type 是否一致
-    ele_dtypes = set([v[1] for v in catalog.values()])
+    try:
+        ele_dtypes = set([v[1] for v in catalog.values()])
+    except TypeError:
+        ele_dtypes = set([str(v[1]) for v in catalog.values()])
     num_eletypes = len(ele_dtypes)
     if num_eletypes != 1:
         msg = f'Field:`{field_name}` cannot pad, since it has various types({ele_dtypes}) of data. To view more ' \
@@ -75,7 +78,7 @@ def get_padder(batch_field:Sequence[Any], pad_val, dtype, backend, field_name)->
 
     depth = depths.pop()
     shape_len = shape_lens.pop()
-    ele_dtype = ele_dtypes.pop()
+    ele_dtype = list(catalog.values())[0][1]  # 因为上面有except的情况，所以这样处理了
 
     # 需要由 padder 自己决定是否能够 pad 。
     try:
@@ -103,13 +106,16 @@ def get_padder(batch_field:Sequence[Any], pad_val, dtype, backend, field_name)->
             else:
                 raise ValueError(f"backend={backend} is not supported for nested list(Field:{field_name}).")
 
-        if depth == 1 and shape_len != 0:
-            if backend == 'numpy':
-                return NumpyTensorPadder(pad_val=pad_val, ele_dtype=ele_dtype, dtype=dtype)
+        # 如果有有 shape 的话，只有当该对象拥有 tolist() 方法才行
+        if depth == 1 and shape_len != 0 and callable(getattr(batch_field[0], 'tolist', None)):
+            if backend == 'raw':
+                return RawTensorPadder(pad_val=pad_val, ele_dtype=None, dtype=dtype)
+            elif backend == 'numpy':
+                return NumpyTensorPadder(pad_val=pad_val, ele_dtype=None, dtype=dtype)
             elif backend == 'torch':
-                return TorchTensorPadder(pad_val=pad_val, ele_dtype=ele_dtype, dtype=dtype)
+                return TorchTensorPadder(pad_val=pad_val, ele_dtype=None, dtype=dtype)
             elif backend == 'paddle':
-                return PaddleTensorPadder(pad_val=pad_val, ele_dtype=ele_dtype, dtype=dtype)
+                return PaddleTensorPadder(pad_val=pad_val, ele_dtype=None, dtype=dtype)
             else:
                 raise ValueError(f"backend={backend} is not supported for tensors(Field:{field_name}).")
 
diff --git a/fastNLP/core/collators/padders/numpy_padder.py b/fastNLP/core/collators/padders/numpy_padder.py
index 40b70683..4d507f2e 100644
--- a/fastNLP/core/collators/padders/numpy_padder.py
+++ b/fastNLP/core/collators/padders/numpy_padder.py
@@ -66,7 +66,7 @@ class NumpySequencePadder(Padder):
 class NumpyTensorPadder(Padder):
     def __init__(self, pad_val=0, ele_dtype=None, dtype=None):
         """
-        pad 类似于 [np.array([3, 4], np.array([1])] 的 field
+        pad 类似于 [np.array([3, 4], np.array([1])] 的 field 。若内部元素不为 np.ndarray ，则必须含有 tolist() 方法。
 
         :param pad_val: pad 的值是多少。
         :param ele_dtype: 用于检测当前 field 的元素类型是否可以转换为 np.array 类型。
@@ -77,6 +77,13 @@ class NumpyTensorPadder(Padder):
 
     @staticmethod
     def pad(batch_field, pad_val, dtype):
+        try:
+            if not isinstance(batch_field[0], np.ndarray):
+                batch_field = [np.array(field.tolist()) for field in batch_field]
+        except AttributeError:
+            raise RuntimeError(f"If the field is not a np.ndarray (it is {type(batch_field[0])}), "
+                               f"it must have tolist() method.")
+
         shapes = [field.shape for field in batch_field]
         max_shape = [len(batch_field)] + [max(*_) for _ in zip(*shapes)]
         array = np.full(max_shape, fill_value=pad_val, dtype=dtype)
diff --git a/fastNLP/core/collators/padders/paddle_padder.py b/fastNLP/core/collators/padders/paddle_padder.py
index 13eda4a9..10d5a385 100644
--- a/fastNLP/core/collators/padders/paddle_padder.py
+++ b/fastNLP/core/collators/padders/paddle_padder.py
@@ -56,7 +56,7 @@ def is_paddle_dtype_str(dtype):
 
 
 def _get_dtype(ele_dtype, dtype, class_name):
-    if not (is_number_or_numpy_number(ele_dtype) or is_paddle_tensor(ele_dtype) or is_paddle_dtype_str(ele_dtype)):
+    if not (ele_dtype is not None or is_number_or_numpy_number(ele_dtype) or is_paddle_tensor(ele_dtype) or is_paddle_dtype_str(ele_dtype)):
         raise EleDtypeUnsupportedError(f"`{class_name}` only supports padding python numbers "
                                        f"or numpy numbers or paddle.Tensor but get `{ele_dtype}`.")
 
@@ -80,7 +80,14 @@ def _get_dtype(ele_dtype, dtype, class_name):
 
 
 class PaddleNumberPadder(Padder):
-    def __init__(self, ele_dtype, pad_val=0, dtype=None):
+    def __init__(self, pad_val=0, ele_dtype=None, dtype=None):
+        """
+        可以将形如 [1, 2, 3] 这类的数据转为 paddle.Tensor([1, 2, 3])
+
+        :param pad_val: 该值无意义
+        :param ele_dtype: 用于检测当前 field 的元素类型是否可以转换为 paddle.tensor 类型。
+        :param dtype: 输出的数据的 dtype 是什么。如 int, float, 'int32' 等
+        """
         # 仅当 ele_dtype 是 python number/ numpy number 或者 tensor
         dtype = _get_dtype(ele_dtype, dtype, class_name=self.__class__.__name__)
         super().__init__(pad_val=pad_val, dtype=dtype)
@@ -91,7 +98,14 @@ class PaddleNumberPadder(Padder):
 
 
 class PaddleSequencePadder(Padder):
-    def __init__(self, ele_dtype, pad_val=0, dtype=None):
+    def __init__(self, ele_dtype=None, pad_val=0, dtype=None):
+        """
+        将类似于 [[1], [1, 2]] 的内容 pad 为 paddle.Tensor([[1, 0], [1, 2]]) 可以 pad 多重嵌套的数据。
+
+        :param pad_val: pad 的值。
+        :param ele_dtype: 用于检测当前 field 的元素类型是否可以转换为 paddle.tensor 类型。
+        :param dtype: 输出的数据的 dtype 是什么。如 int, float, 'int32' 等
+        """
         dtype = _get_dtype(ele_dtype, dtype, class_name=self.__class__.__name__)
         super().__init__(pad_val=pad_val, dtype=dtype)
 
@@ -102,19 +116,26 @@ class PaddleSequencePadder(Padder):
 
 
 class PaddleTensorPadder(Padder):
-    def __init__(self, ele_dtype, pad_val=0, dtype=None):
+    def __init__(self, pad_val=0, ele_dtype=None, dtype=None):
         """
-        目前仅支持 [paddle.tensor([3, 2], paddle.tensor([1])] 类似的
+        目前支持 [paddle.tensor([3, 2], paddle.tensor([2, 1])] 类似的，若内部元素不为 paddle.tensor ，则必须含有 tolist() 方法。
 
-        :param ele_dtype:
-        :param pad_val:
-        :param dtype:
+        :param pad_val: pad 的值。
+        :param ele_dtype: 用于检测当前 field 的元素类型是否可以转换为 paddle.tensor 类型。
+        :param dtype: 输出的数据的 dtype 是什么。如 int, float, 'int32' 等
         """
         dtype = _get_dtype(ele_dtype, dtype, class_name=self.__class__.__name__)
         super().__init__(pad_val=pad_val, dtype=dtype)
 
     @staticmethod
     def pad(batch_field, pad_val, dtype):
+        try:
+            if not isinstance(batch_field[0], paddle.Tensor):
+                batch_field = [paddle.to_tensor(field.tolist()) for field in batch_field]
+        except AttributeError:
+            raise RuntimeError(f"If the field is not a paddle.Tensor (it is {type(batch_field[0])}), "
+                               f"it must have tolist() method.")
+
         shapes = [field.shape for field in batch_field]
         max_shape = [len(batch_field)] + [max(*_) for _ in zip(*shapes)]
         if isinstance(dtype, np.dtype):
diff --git a/fastNLP/core/collators/padders/raw_padder.py b/fastNLP/core/collators/padders/raw_padder.py
index 96fb10f2..bc3bbaee 100644
--- a/fastNLP/core/collators/padders/raw_padder.py
+++ b/fastNLP/core/collators/padders/raw_padder.py
@@ -1,6 +1,7 @@
 __all__ = [
     "RawNumberPadder",
-    "RawSequencePadder"
+    "RawSequencePadder",
+    "RawTensorPadder"
 ]
 
 from .padder import Padder
@@ -66,3 +67,34 @@ class RawSequencePadder(Padder):
         :return:
         """
         return get_padded_numpy_array(batch_field, dtype=dtype, pad_val=pad_val).tolist()
+
+
+class RawTensorPadder(Padder):
+    def __init__(self, pad_val=0, ele_dtype=None, dtype=None):
+        """
+        将类似于 [[1], [1, 2]] 的内容 pad 为 [[1, 0], [1, 2]] 。可以 pad 多重嵌套的数据。
+
+        :param pad_val: pad 的值
+        :param ele_dtype: 用于检测当前 field 的元素类型是否可以转换为 np.array 类型。
+        :param dtype: 输出的数据的 dtype 是什么
+        """
+        dtype = _get_dtype(ele_dtype, dtype, self.__class__.__name__)
+        super().__init__(pad_val=pad_val, dtype=dtype)
+
+    @staticmethod
+    def pad(batch_field, pad_val, dtype):
+        """
+
+        :param batch_field:
+        :param pad_val:
+        :param dtype: 该参数无意义。
+        :return:
+        """
+        try:
+            if not isinstance(batch_field[0], (list, tuple)):
+                batch_field = [field.tolist() for field in batch_field]
+        except AttributeError:
+            raise RuntimeError(f"If the field is not a list or tuple(it is {type(batch_field[0])}), "
+                               f"it must have tolist() method.")
+
+        return get_padded_numpy_array(batch_field, dtype=dtype, pad_val=pad_val).tolist()
diff --git a/fastNLP/core/collators/padders/torch_padder.py b/fastNLP/core/collators/padders/torch_padder.py
index 80485ff3..18f414e8 100644
--- a/fastNLP/core/collators/padders/torch_padder.py
+++ b/fastNLP/core/collators/padders/torch_padder.py
@@ -41,7 +41,7 @@ def is_torch_tensor(dtype):
 
 
 def _get_dtype(ele_dtype, dtype, class_name):
-    if not (ele_dtype is not None and (is_number_or_numpy_number(ele_dtype) or is_torch_tensor(ele_dtype))):
+    if not (ele_dtype is None or (is_number_or_numpy_number(ele_dtype) or is_torch_tensor(ele_dtype))):
         raise EleDtypeUnsupportedError(f"`{class_name}` only supports padding python numbers "
                                        f"or numpy numbers or torch.Tensor but get `{ele_dtype}`.")
 
@@ -101,7 +101,7 @@ class TorchSequencePadder(Padder):
 class TorchTensorPadder(Padder):
     def __init__(self, pad_val=0, ele_dtype=None, dtype=None):
         """
-        目前仅支持 [torch.tensor([3, 2], torch.tensor([1])] 类似的
+        目前支持 [torch.tensor([3, 2], torch.tensor([1])] 类似的。若内部元素不为 torch.tensor ，则必须含有 tolist() 方法。
 
         :param pad_val: 需要 pad 的值。
         :param ele_dtype: 用于检测当前 field 的元素类型是否可以转换为 torch.tensor 类型。
@@ -112,6 +112,13 @@ class TorchTensorPadder(Padder):
 
     @staticmethod
     def pad(batch_field, pad_val, dtype):
+        try:
+            if not isinstance(batch_field[0], torch.Tensor):
+                batch_field = [torch.tensor(field.tolist()) for field in batch_field]
+        except AttributeError:
+            raise RuntimeError(f"If the field is not a torch.Tensor (it is {type(batch_field[0])}), "
+                               f"it must have tolist() method.")
+
         shapes = [field.shape for field in batch_field]
         max_shape = [len(batch_field)] + [max(*_) for _ in zip(*shapes)]
         tensor = torch.full(max_shape, fill_value=pad_val, dtype=dtype)
diff --git a/fastNLP/core/log/print.py b/fastNLP/core/log/print.py
new file mode 100644
index 00000000..30797b89
--- /dev/null
+++ b/fastNLP/core/log/print.py
@@ -0,0 +1,25 @@
+__all__ = [
+    'print'
+]
+
+from .logger import logger
+
+
+def print(*args, sep=' ', end='\n', file=None, flush=False):
+    """
+    用来重定向 print 函数至 logger.info 的函数。
+
+    Example:
+        from fastNLP import print
+
+        print("This is a test")  # 等价于调用了 logger.info("This is a test")
+
+    :param args: 需要打印的内容
+    :param sep: 存在多个输入时，使用的间隔。
+    :param end: 该参数在当前设置无意义，因为结尾一定会被加入 \n 。
+    :param file: 该参数无意义。
+    :param flush: 该参数无意义。
+    :return:
+    """
+    line = sep.join(args)
+    logger.info(line)
\ No newline at end of file
diff --git a/tests/core/collators/padders/test_get_padder.py b/tests/core/collators/padders/test_get_padder.py
index 3725243e..a07a943e 100644
--- a/tests/core/collators/padders/test_get_padder.py
+++ b/tests/core/collators/padders/test_get_padder.py
@@ -23,7 +23,7 @@ def test_get_padder_run(backend):
         pytest.skip("No torch")
     if not _NEED_IMPORT_PADDLE and backend == 'paddle':
         pytest.skip("No paddle")
-    if not _NEED_IMPORT_PADDLE and backend == 'jittor':
+    if not _NEED_IMPORT_JITTOR and backend == 'jittor':
         pytest.skip("No jittor")
     batch_field = [1, 2, 3]
     padder = get_padder(batch_field, pad_val=0, backend=backend, dtype=int, field_name='test')
@@ -67,6 +67,13 @@ def test_raw_padder():
     pad_batch = padder(batch_field)
     assert np.shape(pad_batch) == (3, 3, 2)
 
+    batch_field = [np.ones((3,3)), np.ones((2,3)), np.ones((1,0))]
+    padder = get_padder(batch_field, pad_val=0, backend=backend, dtype=int, field_name='test')
+    pad_batch = padder(batch_field)
+    assert isinstance(pad_batch, list)
+    assert np.shape(pad_batch) == (3, 3, 3)
+    assert (pad_batch == np.zeros(np.shape(pad_batch))).sum()==12
+
 
 def test_numpy_padder():
     backend = 'numpy'
@@ -141,3 +148,18 @@ def test_torch_padder():
     with pytest.raises(InconsistencyError):
         padder = get_padder(batch_field, pad_val=0, backend=backend, dtype=int, field_name='test')
 
+    # 可以是 numpy.ndarray
+    batch_field = [np.ones((3,3)), np.ones((2,3)), np.ones((1,0))]
+    padder = get_padder(batch_field, pad_val=0, backend=backend, dtype=int, field_name='test')
+    pad_batch = padder(batch_field)
+    assert isinstance(pad_batch, target_type)
+    assert pad_batch.shape == (3, 3, 3)
+    assert (pad_batch == torch.zeros(pad_batch.shape)).sum()==12
+
+    # 测试 to numpy
+    batch_field = [torch.ones((3,3)), torch.ones((2,3)), torch.ones((1,0))]
+    padder = get_padder(batch_field, pad_val=0, backend='numpy', dtype=int, field_name='test')
+    pad_batch = padder(batch_field)
+    assert isinstance(pad_batch, np.ndarray)
+    assert np.shape(pad_batch) == (3, 3, 3)
+    assert (pad_batch == np.zeros(np.shape(pad_batch))).sum()==12