Fix pylint and py27 errors

imgaug/augmenters/color.py

@@ -1553,11 +1553,11 @@ def __init__(self, mul=(0.0, 3.0), from_colorspace="RGB", name=None,
 
 class RemoveSaturation(MultiplySaturation):
     """Decrease the saturation of images by varying degrees.
-    
+
     This creates images looking similar to :class:`Grayscale`.
-    
+
     This augmenter is the same as ``MultiplySaturation((0.0, 1.0))``.
-    
+
     Parameters
     ----------
     mul : number or tuple of number or list of number or imgaug.parameters.StochasticParameter, optional
@@ -1573,7 +1573,7 @@ class RemoveSaturation(MultiplySaturation):
               per image.
             * If a StochasticParameter, then a value will be sampled from that
               parameter per image.
-    
+
     from_colorspace : str, optional
         See :func:`imgaug.augmenters.color.change_colorspace_`.
 
@@ -1593,7 +1593,7 @@ class RemoveSaturation(MultiplySaturation):
     >>> image = ia.quokka()  # uint8 (H, W, 3) RGB array
     >>> aug = iaa.RemoveSaturation()
     >>> image_grayish = aug(image=image)
-    
+
     Create and apply an augmenter that decreases saturation by varying degrees.
 
     >>> aug = iaa.RemoveSaturation(1.0)
@@ -2403,7 +2403,7 @@ class GrayscaleColorwise(meta.Augmenter):
 
       1. Split the hue in ``HSV`` into ``nb_bins`` bins.
       2. Shift the bins by ``offset`` degrees. (This way, the ``0th`` bin does
-         not always start at exactly ``0°`` of hue.)
+         not always start at exactly ``0deg`` of hue.)
       3. Sample ``alpha`` values for each bin.
       4. Smoothen the alpha values of neighbouring bins using a gaussian
          kernel. The kernel's ``sigma`` is derived from ``smoothness``.
@@ -2465,7 +2465,7 @@ class GrayscaleColorwise(meta.Augmenter):
         Rotiational shift of each bin as a fraction of ``360`` degrees.
         E.g. ``0.0`` will not shift any bins, while a value of ``0.5`` will
         shift by around ``180`` degrees. This shift is mainly used so that
-        the ``0th`` bin does not always start at ``0°``. Expected value
+        the ``0th`` bin does not always start at ``0deg``. Expected value
         range is ``[0.0, 1.0]``. This parameter can usually kept at the default
         value.
 
@@ -2527,6 +2527,7 @@ def __init__(self, nb_bins=(5, 15), smoothness=(0.1, 0.3),
                  alpha=[0.0, 1.0], offset=(0.0, 1.0),
                  from_colorspace=CSPACE_RGB,
                  name=None, deterministic=False, random_state=None):
+        # pylint: disable=dangerous-default-value
         super(GrayscaleColorwise, self).__init__(
             name=name, deterministic=deterministic, random_state=random_state)
 
@@ -2728,6 +2729,7 @@ def __init__(self, nb_bins=(5, 15), smoothness=(0.1, 0.3),
                  alpha=[0.0, 1.0], offset=(0.0, 1.0),
                  from_colorspace=CSPACE_RGB,
                  name=None, deterministic=False, random_state=None):
+        # pylint: disable=dangerous-default-value
         super(RemoveSaturationColorwise, self).__init__(
             nb_bins=nb_bins, smoothness=smoothness,
             alpha=alpha, offset=offset,
@@ -2748,8 +2750,8 @@ def _apply_grayscale_some_colors_batch_(cls, images, nb_bins, smoothness,
                                          from_colorspaces=from_colorspace)
 
         nth_bin = 0
-        gen = enumerate(zip(images_hsv, nb_bins, smoothness, offset))
-        for i, (img_hsv, nb_bins_i, smoothness_i, offset_i) in gen:
+        gen = zip(images_hsv, nb_bins, smoothness, offset)
+        for img_hsv, nb_bins_i, smoothness_i, offset_i in gen:
             # skip images with zero-sized axes as these cause issues
             # in the used cv2 functions
             if 0 in img_hsv.shape[0:2]: