How I use ChatGPT when writing code.

def adapt_recipe(txt, x):
   adapted_recipte = ""
   for line in txt.splitlines():
         number = line.split(" ")[0]
         if number.isdecimal() :
               volume = round(float(number)*float(x),1)
               adapted_recipte = adapted_recipte + str(volume) + " " + line.replace(number,"") + "\n"
        else:
              adapted_recipte = adapted_recipte + line
   return adapted_recipte

def adapt_recipe(txt, x):
   adapted_recipe = ""
   for line in txt.splitlines():
      parts = line.split(None, 1) # Split the line into number and the rest of the line
      if len(parts) == 2:
         number, rest_of_line = parts
         try:
           number = float(number)
           volume = round(number * x, 1)
           adapted_recipe += f"{volume} {rest_of_line}\n"
         except ValueError:
           # Handle cases where the number cannot be converted to a float
           adapted_recipe += line + "\n"
      else:
         # If the line doesn't contain a number, just append it as is
         adapted_recipe += line + "\n"
   return adapted_recipe

# Test cases
test_recipe = """
   1 cup flour
   2.5 tbsp sugar
   Salt to taste
   Eggs - 2
"""

# Test case 1: Adapt the recipe to 3 times its size (integer)
result = adapt_recipe(test_recipe, 3)
print(result)

# Test case 2: Adapt the recipe to half its size (float)
result = adapt_recipe(test_recipe, 0.5)
print(result)

# Test case 3: No scaling, the recipe remains the same
result = adapt_recipe(test_recipe, 1)
print(result)

The second example gave more help than the above one. This was the requirements

Ingredients in food recipes can be represented by a class Ingredient, which collects together information about them: the name, the unit used, and the amount of calories per unit. Define this class so that the frittata recipe can be defined as a list of tuples of amounts and Ingredient objects, as in the screen dump to the right above. Notice that the missing amount is represented as None. Also define a function calories(ingrs), which computes the total amount of calories in a recipe and works in the way shown to the right below. If the amount is None, that ingredient is just ignored.

def calories(ingre):
    total_calories = 0
    for ingredient in ingre:
        if str(ingredient[0]).isdecimal():
            total_calories = total_calories + ingredient[1].amount_of_calories * ingredient[0]
    print ("Total calories: ", total_calories)
class Ingredient:
    def __init__(self, name, unit, amount_of_calories):
        self.name = name
        self.unit = unit
        self.amount_of_calories = amount_of_calories

def __init__(self, name, unit, amount_of_calories):
   self.name = name
   self.unit = unit
   self.amount_of_calories = amount_of_calories

def calories(ingre):
   total_calories = 0
   for ingredient in ingre:
      if ingredient[0] is not None and str(ingredient[0]).isdecimal():
         total_calories += ingredient[1].amount_of_calories * ingredient[0]
   return total_calories

# Test cases
if __name__ == "__main__":
   # Create Ingredient objects
   egg = Ingredient("Egg", "unit", 68)
   cheese = Ingredient("Cheese", "gram", 110)
   bacon = Ingredient("Bacon", "strip", 42)

   # Define a frittata recipe
   frittata_recipe = [
      (2, egg),
      (None, cheese), # Test None as the amount
      (3, bacon),
   ]

   # Calculate calories in the frittata recipe
   total_calories = calories(frittata_recipe)

   print("Total calories in the frittata recipe:", total_calories) # Expected output: 2 * 68 + 3 * 42 = 282

Improvements and suggestions:

1. In the “calories” function, I’ve added a check for “ingredient[0] is not None” to ignore ingredients with “None” as their amount.
2. I’ve removed the “print” statement from the “calories” function since it’s generally better to return the value and let the caller decide whether to print or use the result.
3. I’ve added test cases to demonstrate how the code works, including a case where one ingredient has “None” as the amount.
4. Ensure that the “amount_of_calories” is a numeric value (integer or float) when creating Ingredient objects. It’s a good practice to validate inputs to your class.
5. Make sure to define the ingredients and the frittata recipe as needed for your application.

# Test Case 1: Empty recipe
empty_recipe = []
assert calories(empty_recipe) == 0

# Test Case 2: Recipe with a single ingredient
single_ingredient_recipe = [(2, Ingredient('carrot', 'g', 41))]
assert calories(single_ingredient_recipe) == 2 * 41

# Test Case 3: Recipe with multiple ingredients and one ingredient having None as amount
mixed_recipe = [
   (3, Ingredient('chicken breast', 'oz', 46)),
   (None, Ingredient('sugar', 'g', 387)), # Ignored due to None
   (2, Ingredient('broccoli', 'g', 34)),
   (1.5, Ingredient('milk', 'cup', 103)),
]
assert calories(mixed_recipe) == 3 * 46 + 2 * 34 + 1.5 * 103

# Test Case 4: Recipe with all ingredients having None as amount (should result in 0 calories)
no_amount_recipe = [
   (None, Ingredient('flour', 'g', 364)),
   (None, Ingredient('sugar', 'g', 387)),
   (None, Ingredient('butter', 'g', 717)),
]
assert calories(no_amount_recipe) == 0

# Test Case 5: Recipe with negative amounts (should be treated as 0 calories)
negative_amount_recipe = [
   (-1, Ingredient('apple', 'unit', 52)),
   (2, Ingredient('banana', 'unit', 105)),
]
assert calories(negative_amount_recipe) == 2 * 105 # The negative amount is ignored

# Test Case 6: Recipe with ingredients having zero calories
zero_calories_recipe = [
   (2, Ingredient('lettuce', 'g', 0)),
   (3, Ingredient('tomato', 'unit', 0)),
   (1, Ingredient('cucumber', 'g', 0)),
]
assert calories(zero_calories_recipe) == 0

print("All test cases passed!")

These test cases cover various scenarios, including empty recipes, different units, ignored ingredients with “None” amounts, negative amounts, and ingredients with zero calories. Each assertion checks whether the calculated total calories match the expected result. If all assertions pass, it will print “All test cases passed!” to indicate success.

def calories(ingre):
   total_calories = 0
   for amount, ingredient in ingre:
      if amount is not None and str(amount).replace(".", "", 1).isnumeric():
         total_calories += ingredient.amount_of_calories * amount
   return total_calories

def calories(ingre):
    total_calories = 0
    for ingredient in ingre:
        if str(ingredient[0]).replace(".", "", 1).isdecimal():
            total_calories = total_calories + ingredient[1].amount_of_calories * float(ingredient[0])
        else:
            print(ingredient[0], ingredient[1].amount_of_calories )
    return (total_calories)