to make changes for error : B006

dynamic_programming/trapped_water.py

@@ -12,7 +12,7 @@
 on both sides minus height of bar at current position.
 """
 
-def trapped_rainwater(height : list = [0,1,0,2,1,0,1,3,2,1,2,1]) -> int: 
+def trapped_rainwater(height : list = []) -> int: 
  """
  The trapped_rainwater function calculates the total amount of rainwater 
  that can be trapped given an array of bar heights. 
@@ -28,6 +28,8 @@ def trapped_rainwater(height : list = [0,1,0,2,1,0,1,3,2,1,2,1]) -> int:
  >>> 0
 
  """
+ if height == []:
+ return 0
  length = len(height)
 
  left_max = [0]*length