prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  [tensor] fix some unittests
  
  [tensor] fix some unittests
  
  [tensor] fix some unittests
  
  
  </issue>
  <code>
  [start of colossalai/engine/gradient_handler/__init__.py]
  1 from ._base_gradient_handler import BaseGradientHandler
  2 from ._data_parallel_gradient_handler import DataParallelGradientHandler
  3 from ._zero_gradient_handler import ZeROGradientHandler
  4 from ._sequence_parallel_gradient_handler import SequenceParallelGradientHandler
  5 from ._pipeline_parallel_gradient_handler import PipelineSharedModuleGradientHandler
  6 from ._moe_gradient_handler import MoeGradientHandler
  7 from ._sequence_parallel_gradient_handler import SequenceParallelGradientHandler
  8 
  9 __all__ = [
  10     'BaseGradientHandler', 'DataParallelGradientHandler', 'ZeROGradientHandler', 'PipelineSharedModuleGradientHandler',
  11     'MoeGradientHandler', 'SequenceParallelGradientHandler'
  12 ]
  13
  [end of colossalai/engine/gradient_handler/__init__.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/colossalai/engine/gradient_handler/__init__.py b/colossalai/engine/gradient_handler/__init__.py
  --- a/colossalai/engine/gradient_handler/__init__.py
  +++ b/colossalai/engine/gradient_handler/__init__.py
  @@ -1,10 +1,9 @@
   from ._base_gradient_handler import BaseGradientHandler
   from ._data_parallel_gradient_handler import DataParallelGradientHandler
  -from ._zero_gradient_handler import ZeROGradientHandler
  -from ._sequence_parallel_gradient_handler import SequenceParallelGradientHandler
  -from ._pipeline_parallel_gradient_handler import PipelineSharedModuleGradientHandler
   from ._moe_gradient_handler import MoeGradientHandler
  +from ._pipeline_parallel_gradient_handler import PipelineSharedModuleGradientHandler
   from ._sequence_parallel_gradient_handler import SequenceParallelGradientHandler
  +from ._zero_gradient_handler import ZeROGradientHandler
   
   __all__ = [
       'BaseGradientHandler', 'DataParallelGradientHandler', 'ZeROGradientHandler', 'PipelineSharedModuleGradientHandler',
  
verification_info: {"golden_diff": "diff --git a/colossalai/engine/gradient_handler/__init__.py b/colossalai/engine/gradient_handler/__init__.py\n--- a/colossalai/engine/gradient_handler/__init__.py\n+++ b/colossalai/engine/gradient_handler/__init__.py\n@@ -1,10 +1,9 @@\n from ._base_gradient_handler import BaseGradientHandler\n from ._data_parallel_gradient_handler import DataParallelGradientHandler\n-from ._zero_gradient_handler import ZeROGradientHandler\n-from ._sequence_parallel_gradient_handler import SequenceParallelGradientHandler\n-from ._pipeline_parallel_gradient_handler import PipelineSharedModuleGradientHandler\n from ._moe_gradient_handler import MoeGradientHandler\n+from ._pipeline_parallel_gradient_handler import PipelineSharedModuleGradientHandler\n from ._sequence_parallel_gradient_handler import SequenceParallelGradientHandler\n+from ._zero_gradient_handler import ZeROGradientHandler\n \n __all__ = [\n     'BaseGradientHandler', 'DataParallelGradientHandler', 'ZeROGradientHandler', 'PipelineSharedModuleGradientHandler',\n", "issue": "[tensor] fix some unittests\n\n[tensor] fix some unittests\n\n[tensor] fix some unittests\n\n", "before_files": [{"content": "from ._base_gradient_handler import BaseGradientHandler\nfrom ._data_parallel_gradient_handler import DataParallelGradientHandler\nfrom ._zero_gradient_handler import ZeROGradientHandler\nfrom ._sequence_parallel_gradient_handler import SequenceParallelGradientHandler\nfrom ._pipeline_parallel_gradient_handler import PipelineSharedModuleGradientHandler\nfrom ._moe_gradient_handler import MoeGradientHandler\nfrom ._sequence_parallel_gradient_handler import SequenceParallelGradientHandler\n\n__all__ = [\n    'BaseGradientHandler', 'DataParallelGradientHandler', 'ZeROGradientHandler', 'PipelineSharedModuleGradientHandler',\n    'MoeGradientHandler', 'SequenceParallelGradientHandler'\n]\n", "path": "colossalai/engine/gradient_handler/__init__.py"}]}