Implement lasagna time calculation functions

exercises/concept/guidos-gorgeous-lasagna/lasagna.py

@@ -5,31 +5,50 @@
 
 This is a module docstring, used to describe the functionality
 of a module and its functions and/or classes.
-"""
+"""# time the lasagna should be in the oven according to the cookbook.
+EXPECTED_BAKE_TIME = 40
+PREPARATION_TIME = 2
 
 
-#TODO: define your EXPECTED_BAKE_TIME (required) and PREPARATION_TIME (optional) constants below.
+def bake_time_remaining(elapsed_bake_time):
+    """Calculate the bake time remaining.
 
+   :param elapsed_bake_time: int baking time already elapsed
+   :return: int remaining bake time (in minutes) derived from 'EXPECTED_BAKE_TIME'
 
-#TODO: Remove 'pass' and complete the 'bake_time_remaining()' function below.
-def bake_time_remaining():
-    """Calculate the bake time remaining.
+   Function that takes the actual minutes the lasagna has been in the oven as
+   an argument and returns how many minutes the lasagna still needs to bake
+   based on the `EXPECTED_BAKE_TIME`.
+   """
+
+    return EXPECTED_BAKE_TIME - elapsed_bake_time
+
+
+def preparation_time_in_minutes(number_of_layers):
+    """Calculate the preparation time.
 
-    :param elapsed_bake_time: int - baking time already elapsed.
-    :return: int - remaining bake time (in minutes) derived from 'EXPECTED_BAKE_TIME'.
+    :param number_of_layers: int the number of lasagna layers made
+    :return: int amount of prep time (in minutes), based on 2 minutes per layer added
 
-    Function that takes the actual minutes the lasagna has been in the oven as
-    an argument and returns how many minutes the lasagna still needs to bake
-    based on the `EXPECTED_BAKE_TIME`.
+    This function takes an integer representing the number of layers added to the dish,
+    calculating preparation time using a time of 2 minutes per layer added.
     """
 
-    pass
+    return number_of_layers * PREPARATION_TIME
 
 
-#TODO: Define the 'preparation_time_in_minutes()' function below.
-# To avoid the use of magic numbers (see: https://en.wikipedia.org/wiki/Magic_number_(programming)), you should define a PREPARATION_TIME constant.
-# You can do that on the line below the 'EXPECTED_BAKE_TIME' constant.
-# This will make it easier to do calculations, and make changes to your code.
+def elapsed_time_in_minutes(number_of_layers, elapsed_bake_time):
+    """Calculate the elapsed time.
+
+    :param number_of_layers: int the number of layers in the lasagna
+    :param elapsed_bake_time: int elapsed cooking time
+    :return:  int total time elapsed (in in minutes) preparing and cooking
+
+    This function takes two integers representing the number of lasagna layers and the time already spent baking
+     and calculates the total elapsed minutes spent cooking the lasagna.
+    """
+
+    return preparation_time_in_minutes(number_of_layers) + elapsed_bake_time