fix the prelu

x2paddle/decoder/caffe_decoder.py

@@ -244,9 +244,11 @@ class CaffeDecoder(object):
             if len(blob.shape.dim):
                 dims = blob.shape.dim
                 if layer.type == 'PReLU':
-                    c_o, c_i, h, w = map(int, [1] + list(dims) + [1]* (3 - len(dims)))
+                    c_o, c_i, h, w = map(int, [1] + \
+                        list(dims) + [1]* (3 - len(dims)))
                 else:
-                    c_o, c_i, h, w = map(int, [1] * (4 - len(dims)) + list(dims))
+                    c_o, c_i, h, w = map(int, [1] * (4 - len(dims)) \
+                        + list(dims))
             else:
                 c_o = blob.num
                 c_i = blob.channels