fix random probability (#33751)

* fix random probability

* fix random probability

python/paddle/vision/transforms/transforms.py

@@ -555,6 +555,7 @@ class RandomHorizontalFlip(BaseTransform):
 
     def __init__(self, prob=0.5, keys=None):
         super(RandomHorizontalFlip, self).__init__(keys)
+        assert 0 <= prob <= 1, "probability must be between 0 and 1"
         self.prob = prob
 
     def _apply_image(self, img):
@@ -589,6 +590,7 @@ class RandomVerticalFlip(BaseTransform):
 
     def __init__(self, prob=0.5, keys=None):
         super(RandomVerticalFlip, self).__init__(keys)
+        assert 0 <= prob <= 1, "probability must be between 0 and 1"
         self.prob = prob
 
     def _apply_image(self, img):