(unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \

[hema]

train_dir = 'data/train'
val_dir = 'data/test'
train_datagen = ImageDataGenerator(rescale=1./255)
val_datagen = ImageDataGenerator(rescale=1./255)

train_generator = train_datagen.flow_from_directory('C:\\Users\\Dell\\Desktop\\train',
target_size=(48,48),
batch_size=64,
color_mode="gray_framescale",
class_mode='categorical')

validation_generator = val_datagen.flow_from_directory('C:\\Users\\Dell\\Desktop\\test',
target_size=(48,48),
batch_size=64,
color_mode="gray_framescale",
class_mode='categorical')
its my code....and it raised some error....


ValueError Traceback (most recent call last)
<ipython-input-8-cec40955d457> in <module>()
8 batch_size=64,
9 color_mode="gray_framescale",
---> 10 class_mode='categorical')
11
12 validation_generator = val_datagen.flow_from_directory('C:\\Users\\Dell\\Desktop\\test',

3 frames
/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/preprocessing/image.py in flow_from_directory(self, directory, target_size, color_mode, classes, class_mode, batch_size, shuffle, seed, save_to_dir, save_prefix, save_format, follow_links, subset, interpolation)
956 follow_links=follow_links,
957 subset=subset,
--> 958 interpolation=interpolation)
959
960 def flow_from_dataframe(self,

/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/preprocessing/image.py in __init__(self, directory, image_data_generator, target_size, color_mode, classes, class_mode, batch_size, shuffle, seed, data_format, save_to_dir, save_prefix, save_format, follow_links, subset, interpolation, dtype)
394 subset=subset,
395 interpolation=interpolation,
--> 396 **kwargs)
397
398

/usr/local/lib/python3.6/dist-packages/keras_preprocessing/image/directory_iterator.py in __init__(self, directory, image_data_generator, target_size, color_mode, classes, class_mode, batch_size, shuffle, seed, data_format, save_to_dir, save_prefix, save_format, follow_links, subset, interpolation, dtype)
100 save_format,
101 subset,
--> 102 interpolation)
103 self.directory = directory
104 self.classes = classes

/usr/local/lib/python3.6/dist-packages/keras_preprocessing/image/iterator.py in set_processing_attrs(self, image_data_generator, target_size, color_mode, data_format, save_to_dir, save_prefix, save_format, subset, interpolation)
174 if color_mode not in {'rgb', 'rgba', 'grayscale'}:
175 raise ValueError('Invalid color mode:', color_mode,
--> 176 '; expected "rgb", "rgba", or "grayscale".')
177 self.color_mode = color_mode
178 self.data_format = data_format

ValueError: ('Invalid color mode:', 'gray_framescale', '; expected "rgb", "rgba", or "grayscale".')

....its an error i got plz hlp me