prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Missing ship numpy testing decorator
  ```
  Traceback (most recent call last):
    File "/Users/mbussonnier/dev/cpython/test/bin/iptest", line 6, in <module>
      from IPython.testing.iptestcontroller import main
    File "/Users/mbussonnier/dev/cpython/test/lib/python3.8/site-packages/IPython/testing/iptestcontroller.py", line 23, in <module>
      from .iptest import (
    File "/Users/mbussonnier/dev/cpython/test/lib/python3.8/site-packages/IPython/testing/iptest.py", line 40, in <module>
      from IPython.external.decorators import KnownFailure, dec
  ImportError: cannot import name 'dec' from 'IPython.external.decorators' (/Users/mbussonnier/dev/cpython/test/lib/python3.8/site-packages/IPython/external/decorators/__init__.py)
  ```
  
  Seem like `dec` is not define ini out `_decorator.py` 
  
  
  Appologies for shortness boarding a plane
  
  </issue>
  <code>
  [start of IPython/external/decorators/__init__.py]
  1 try:
  2     from numpy.testing import *
  3     from numpy.testing import dec
  4     from numpy.testing.noseclasses import KnownFailure
  5 except ImportError:
  6     from ._decorators import *
  7     try:
  8         from ._numpy_testing_noseclasses import KnownFailure
  9     except ImportError:
  10         pass
  11
  [end of IPython/external/decorators/__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/IPython/external/decorators/__init__.py b/IPython/external/decorators/__init__.py
  --- a/IPython/external/decorators/__init__.py
  +++ b/IPython/external/decorators/__init__.py
  @@ -1,9 +1,7 @@
   try:
  -    from numpy.testing import *
  -    from numpy.testing import dec
  -    from numpy.testing.noseclasses import KnownFailure
  +    from numpy.testing.noseclasses import KnownFailure, knownfailureif
   except ImportError:
  -    from ._decorators import *
  +    from ._decorators import knownfailureif
       try:
           from ._numpy_testing_noseclasses import KnownFailure
       except ImportError:
  
verification_info: {"golden_diff": "diff --git a/IPython/external/decorators/__init__.py b/IPython/external/decorators/__init__.py\n--- a/IPython/external/decorators/__init__.py\n+++ b/IPython/external/decorators/__init__.py\n@@ -1,9 +1,7 @@\n try:\n-    from numpy.testing import *\n-    from numpy.testing import dec\n-    from numpy.testing.noseclasses import KnownFailure\n+    from numpy.testing.noseclasses import KnownFailure, knownfailureif\n except ImportError:\n-    from ._decorators import *\n+    from ._decorators import knownfailureif\n     try:\n         from ._numpy_testing_noseclasses import KnownFailure\n     except ImportError:\n", "issue": "Missing ship numpy testing decorator\n```\r\nTraceback (most recent call last):\r\n  File \"/Users/mbussonnier/dev/cpython/test/bin/iptest\", line 6, in <module>\r\n    from IPython.testing.iptestcontroller import main\r\n  File \"/Users/mbussonnier/dev/cpython/test/lib/python3.8/site-packages/IPython/testing/iptestcontroller.py\", line 23, in <module>\r\n    from .iptest import (\r\n  File \"/Users/mbussonnier/dev/cpython/test/lib/python3.8/site-packages/IPython/testing/iptest.py\", line 40, in <module>\r\n    from IPython.external.decorators import KnownFailure, dec\r\nImportError: cannot import name 'dec' from 'IPython.external.decorators' (/Users/mbussonnier/dev/cpython/test/lib/python3.8/site-packages/IPython/external/decorators/__init__.py)\r\n```\r\n\r\nSeem like `dec` is not define ini out `_decorator.py` \r\n\r\n\r\nAppologies for shortness boarding a plane\n", "before_files": [{"content": "try:\n    from numpy.testing import *\n    from numpy.testing import dec\n    from numpy.testing.noseclasses import KnownFailure\nexcept ImportError:\n    from ._decorators import *\n    try:\n        from ._numpy_testing_noseclasses import KnownFailure\n    except ImportError:\n        pass\n", "path": "IPython/external/decorators/__init__.py"}]}