prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Add nightly tests for windows/macos
  Currently we only test our nightlies on linux:
  https://github.com/tensorflow/addons/blob/master/.travis.yml#L17
  
  It should be relatively simple to enable tests for macos/windows, with the one caveat that `tf-nightly` is not published for windows. 
  
  </issue>
  <code>
  [start of tensorflow_addons/losses/__init__.py]
  1 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
  2 #
  3 # Licensed under the Apache License, Version 2.0 (the "License");
  4 # you may not use this file except in compliance with the License.
  5 # You may obtain a copy of the License at
  6 #
  7 #     http://www.apache.org/licenses/LICENSE-2.0
  8 #
  9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14 # ==============================================================================
  15 """Additional losses that conform to Keras API."""
  16 
  17 from __future__ import absolute_import
  18 from __future__ import division
  19 from __future__ import print_function
  20 
  21 from tensorflow_addons.losses.contrastive import contrastive_loss, ContrastiveLoss
  22 from tensorflow_addons.losses.focal_loss import sigmoid_focal_crossentropy, SigmoidFocalCrossEntropy
  23 from tensorflow_addons.losses.giou_loss import giou_loss, GIoULoss
  24 from tensorflow_addons.losses.lifted import lifted_struct_loss, LiftedStructLoss
  25 from tensorflow_addons.losses.npairs import npairs_loss, NpairsLoss, npairs_multilabel_loss, NpairsMultilabelLoss
  26 from tensorflow_addons.losses.sparsemax_loss import sparsemax_loss, SparsemaxLoss
  27 from tensorflow_addons.losses.triplet import triplet_semihard_loss, TripletSemiHardLoss
  28
  [end of tensorflow_addons/losses/__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/tensorflow_addons/losses/__init__.py b/tensorflow_addons/losses/__init__.py
  --- a/tensorflow_addons/losses/__init__.py
  +++ b/tensorflow_addons/losses/__init__.py
  @@ -22,6 +22,11 @@
   from tensorflow_addons.losses.focal_loss import sigmoid_focal_crossentropy, SigmoidFocalCrossEntropy
   from tensorflow_addons.losses.giou_loss import giou_loss, GIoULoss
   from tensorflow_addons.losses.lifted import lifted_struct_loss, LiftedStructLoss
  -from tensorflow_addons.losses.npairs import npairs_loss, NpairsLoss, npairs_multilabel_loss, NpairsMultilabelLoss
   from tensorflow_addons.losses.sparsemax_loss import sparsemax_loss, SparsemaxLoss
   from tensorflow_addons.losses.triplet import triplet_semihard_loss, TripletSemiHardLoss
  +
  +# Temporarily disable for windows
  +# Remove after: https://github.com/tensorflow/addons/issues/838
  +import os
  +if os.name != 'nt':
  +    from tensorflow_addons.losses.npairs import npairs_loss, NpairsLoss, npairs_multilabel_loss, NpairsMultilabelLoss
  
verification_info: {"golden_diff": "diff --git a/tensorflow_addons/losses/__init__.py b/tensorflow_addons/losses/__init__.py\n--- a/tensorflow_addons/losses/__init__.py\n+++ b/tensorflow_addons/losses/__init__.py\n@@ -22,6 +22,11 @@\n from tensorflow_addons.losses.focal_loss import sigmoid_focal_crossentropy, SigmoidFocalCrossEntropy\n from tensorflow_addons.losses.giou_loss import giou_loss, GIoULoss\n from tensorflow_addons.losses.lifted import lifted_struct_loss, LiftedStructLoss\n-from tensorflow_addons.losses.npairs import npairs_loss, NpairsLoss, npairs_multilabel_loss, NpairsMultilabelLoss\n from tensorflow_addons.losses.sparsemax_loss import sparsemax_loss, SparsemaxLoss\n from tensorflow_addons.losses.triplet import triplet_semihard_loss, TripletSemiHardLoss\n+\n+# Temporarily disable for windows\n+# Remove after: https://github.com/tensorflow/addons/issues/838\n+import os\n+if os.name != 'nt':\n+    from tensorflow_addons.losses.npairs import npairs_loss, NpairsLoss, npairs_multilabel_loss, NpairsMultilabelLoss\n", "issue": "Add nightly tests for windows/macos\nCurrently we only test our nightlies on linux:\r\nhttps://github.com/tensorflow/addons/blob/master/.travis.yml#L17\r\n\r\nIt should be relatively simple to enable tests for macos/windows, with the one caveat that `tf-nightly` is not published for windows. \n", "before_files": [{"content": "# Copyright 2019 The TensorFlow Authors. All Rights Reserved.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n# ==============================================================================\n\"\"\"Additional losses that conform to Keras API.\"\"\"\n\nfrom __future__ import absolute_import\nfrom __future__ import division\nfrom __future__ import print_function\n\nfrom tensorflow_addons.losses.contrastive import contrastive_loss, ContrastiveLoss\nfrom tensorflow_addons.losses.focal_loss import sigmoid_focal_crossentropy, SigmoidFocalCrossEntropy\nfrom tensorflow_addons.losses.giou_loss import giou_loss, GIoULoss\nfrom tensorflow_addons.losses.lifted import lifted_struct_loss, LiftedStructLoss\nfrom tensorflow_addons.losses.npairs import npairs_loss, NpairsLoss, npairs_multilabel_loss, NpairsMultilabelLoss\nfrom tensorflow_addons.losses.sparsemax_loss import sparsemax_loss, SparsemaxLoss\nfrom tensorflow_addons.losses.triplet import triplet_semihard_loss, TripletSemiHardLoss\n", "path": "tensorflow_addons/losses/__init__.py"}]}