apparently a comment starts with "# " not just with "#"

pet_functions.py

@@ -10,6 +10,7 @@ owl = "(^0M0^)"
 # variables needed for the guessing game
 secret = randint(1, 10)
 
+
 def pet_stats():
     print(pet_variables.pet_name)
     print(pet_variables.pet_photo)
@@ -19,6 +20,7 @@ def pet_stats():
     print("Hunger: " + pet_variables.pet_hunger * "*")
     print("Happines: " + pet_variables.pet_happiness * "☺")
 
+
 # A function which checks if the pet is still alive
 def is_alive():
     if pet_variables.pet_health > 0:
@@ -26,6 +28,7 @@ def is_alive():
     else:
         return False
 
+
 # A function which let's the player choose his pet.
 def beginning():
     print("Which pet do you want to look after?")
@@ -40,6 +43,7 @@ def  beginning():
     elif chosen_pet == 4:
         pet_variables.pet_photo = owl
 
+
 # A cunction which changes the status of the pet depending of the age value.
 # Each status has it's own characteristics.
 def aging():
@@ -62,24 +66,28 @@ def aging():
         print("Congratulation your pet has become an elderly it needs now less food.")
         print("However it's health is worse and it's grumpier than an adult.")
 
+
 def decrease_hunger():
     pet_variables.pet_hunger = pet_variables.pet_hunger - 1
 
+
 def decrease_happiness():
     pet_variables.pet_happiness = pet_variables.pet_happiness - 1
 
+
 def decrease_health():
     pet_variables.pet_health = pet_variables.pet_health - 1
 
+
 def decrease_stats():
     while True:
         time.sleep(15)
-        if not pet_variables.pet_hunger == 0:
         decrease_hunger()
-        else:
+        if pet_variables.pet_hunger <= 0:
             decrease_health()
             decrease_happiness()
 
+
 # Increases the pets hungriness by +1 unless the hunger is bigger than
 # the pet's maximum hunger. In this case the pet womits and looses hunger
 # and health.
@@ -90,6 +98,7 @@ def feading():
     if feading_confirmed in ("Y", "y"):
         pet_variables.pet_hunger = pet_variables.pet_hunger + 1
 
+
 # A simple guessing game which increases the pet's happiness
 def playing():
     pet_variables.pet_happiness

tamagotchi.py

@@ -20,9 +20,10 @@ while pet_functions.is_alive():
         print()
         print("Your pet is currently a youngling which means it's needs a lot of attention.")
         print("Take good care of it or it will die very soon.")
-    #Each round print the pets stats so that the player can see them.
+    # checks if the pet has reached a new life stage and updates it accordingly
     pet_functions.aging()
     print()
+    # Each round print the pets stats so that the player can see them.
     pet_functions.pet_stats()
     print()
     # Present the player with activities to choose from