Update transforms __repr__ (#419)

* Update transforms __repr__

* Add _pil_interpolation_to_str map for obtaining strings for PIL.Image interpolation options

* Fix typo

torchvision/transforms/transforms.py

@@ -20,6 +20,13 @@ __all__ = ["Compose", "ToTensor", "ToPILImage", "Normalize", "Resize", "Scale",
            "RandomVerticalFlip", "RandomResizedCrop", "RandomSizedCrop", "FiveCrop", "TenCrop", "LinearTransformation",
            "ColorJitter", "RandomRotation", "Grayscale", "RandomGrayscale"]
 
+_pil_interpolation_to_str = {
+    Image.NEAREST: 'PIL.Image.NEAREST',
+    Image.BILINEAR: 'PIL.Image.BILINEAR',
+    Image.BICUBIC: 'PIL.Image.BICUBIC',
+    Image.LANCZOS: 'PIL.Image.LANCZOS',
+}
+
 
 class Compose(object):
     """Composes several transforms together.
@@ -103,7 +110,11 @@ class ToPILImage(object):
         return F.to_pil_image(pic, self.mode)
 
     def __repr__(self):
-        return self.__class__.__name__ + '({0})'.format(self.mode)
+        format_string = self.__class__.__name__ + '('
+        if self.mode is not None:
+            format_string += 'mode={0}'.format(self.mode)
+        format_string += ')'
+        return format_string
 
 
 class Normalize(object):
@@ -164,7 +175,8 @@ class Resize(object):
         return F.resize(img, self.size, self.interpolation)
 
     def __repr__(self):
-        return self.__class__.__name__ + '(size={0})'.format(self.size)
+        interpolate_str = _pil_interpolation_to_str[self.interpolation]
+        return self.__class__.__name__ + '(size={0}, interpolation={1})'.format(self.size, interpolate_str)
 
 
 class Scale(Resize):
@@ -240,7 +252,7 @@ class Pad(object):
         return F.pad(img, self.padding, self.fill)
 
     def __repr__(self):
-        return self.__class__.__name__ + '(padding={0})'.format(self.padding)
+        return self.__class__.__name__ + '(padding={0}, fill={1})'.format(self.padding, self.fill)
 
 
 class Lambda(object):
@@ -388,7 +400,7 @@ class RandomCrop(object):
         return F.crop(img, i, j, h, w)
 
     def __repr__(self):
-        return self.__class__.__name__ + '(size={0})'.format(self.size)
+        return self.__class__.__name__ + '(size={0}, padding={1})'.format(self.size, self.padding)
 
 
 class RandomHorizontalFlip(object):
@@ -511,7 +523,12 @@ class RandomResizedCrop(object):
         return F.resized_crop(img, i, j, h, w, self.size, self.interpolation)
 
     def __repr__(self):
-        return self.__class__.__name__ + '(size={0})'.format(self.size)
+        interpolate_str = _pil_interpolation_to_str[self.interpolation]
+        format_string = self.__class__.__name__ + '(size={0}'.format(self.size)
+        format_string += ', scale={0}'.format(round(self.scale, 4))
+        format_string += ', ratio={0}'.format(round(self.ratio, 4))
+        format_string += ', interpolation={0})'.format(interpolate_str)
+        return format_string
 
 
 class RandomSizedCrop(RandomResizedCrop):
@@ -603,7 +620,7 @@ class TenCrop(object):
         return F.ten_crop(img, self.size, self.vertical_flip)
 
     def __repr__(self):
-        return self.__class__.__name__ + '(size={0})'.format(self.size)
+        return self.__class__.__name__ + '(size={0}, vertical_flip={1})'.format(self.size, self.vertical_flip)
 
 
 class LinearTransformation(object):
@@ -716,7 +733,12 @@ class ColorJitter(object):
         return transform(img)
 
     def __repr__(self):
-        return self.__class__.__name__ + '()'
+        format_string = self.__class__.__name__ + '('
+        format_string += 'brightness={0}'.format(self.brightness)
+        format_string += ', contrast={0}'.format(self.contrast)
+        format_string += ', saturation={0}'.format(self.saturation)
+        format_string += ', hue={0})'.format(self.hue)
+        return format_string
 
 
 class RandomRotation(object):
@@ -777,7 +799,13 @@ class RandomRotation(object):
         return F.rotate(img, angle, self.resample, self.expand, self.center)
 
     def __repr__(self):
-        return self.__class__.__name__ + '(degrees={0})'.format(self.degrees)
+        format_string = self.__class__.__name__ + '(degrees={0}'.format(self.degrees)
+        format_string += ', resample={0}'.format(self.resample)
+        format_string += ', expand={0}'.format(self.expand)
+        if self.center is not None:
+            format_string += ', center={0}'.format(self.center)
+        format_string += ')'
+        return format_string
 
 
 class Grayscale(object):
@@ -807,7 +835,7 @@ class Grayscale(object):
         return F.to_grayscale(img, num_output_channels=self.num_output_channels)
 
     def __repr__(self):
-        return self.__class__.__name__ + '()'
+        return self.__class__.__name__ + '(num_output_channels={0})'.format(self.num_output_channels)
 
 
 class RandomGrayscale(object):
@@ -841,4 +869,4 @@ class RandomGrayscale(object):
         return img
 
     def __repr__(self):
-        return self.__class__.__name__ + '()'
+        return self.__class__.__name__ + '(p={0})'.format(self.p)