I updated clamp and bounds.

transform.py

@@ -26,34 +26,18 @@ def minimum(data):
 
 def bounds(data):
     "Returns a list of the smallest and largest numbers in data"
-    lowest = None
-    for number in data:
-        if lowest is None:
-            lowest = number
-        if number < lowest:
-            lowest = number
-    highest = None
-    for number in data:
-        if highest is None:
-            highest = number
-        if number > highest:
-            highest = number
-    return [lowest, highest]
+    return [minimum(data), maximum(data)]
 
 def clamp(value, low, high):
     """Clamps a value to a range from low to high. 
     Returns value if it is between low and high.
     If value is lower than low, returns low. If value is higher than high, returns high.
     """
-    if low < value < high:
+    if low < value and value < high:
         return value
-    if value < low:
+    if value <= low:
         return low
-    if value == low:
-        return low
-    if value > high:
-        return high
-    if value == high:
+    if value >= high:
         return high