TR updates, first round

Author: lpozo

python-built-in-exceptions/average.py

@@ -1,4 +1,4 @@
 def average_grade(grades):
-    if len(grades) == 0:
+    if not grades:
         raise ValueError("empty grades not allowed")
     return sum(grades) / len(grades)

python-built-in-exceptions/fizzbuzz.py

@@ -21,8 +21,8 @@ def fizzbuzz(number):
 
 
 if __name__ == "__main__":
-    assert fizzbuzz(3) == "fizz"
-    assert fizzbuzz(5) == "buzz"
+    assert fizzbuzz(9) == "fizz"
+    assert fizzbuzz(10) == "buzz"
     assert fizzbuzz(15) == "fizz buzz"
     assert fizzbuzz(7) == 7
     print("All tests pass")

python-built-in-exceptions/rainbow.py

@@ -11,7 +11,7 @@
 
 class RainbowColor:
     def __init__(self, name="Red"):
-        name = name.lower().title()
+        name = name.title()
         if name not in COLORS:
             raise ValueError(f"{name} is not a valid rainbow color")
         self.name = name