Contenido del Curso

Introduction to Python Video Course

1. Getting Started

First Steps Comments Simple Math Operations Grocery Calculation Capstone Recap

2. Variables and Types

Data Types Storing Data in Variables Variable Naming Rules Using Variables String Indexing and Length String Slicing and Concatenation Inventory Sorting Capstone Challenge Recap

3. Conditional Statements

Boolean Data Type Combining Conditions Challenge Membership Operators and Type Comparisons Conditional Expressions Capstone Challenge Recap

4. Other Data Types

Lists and List Methods Nested Lists Challenge Tuples and Tuple Methods Tuple Operations Challenge Dictionaries and Dictionary Methods Capstone Challenge Recap

5. Loops

For Loops While Loops Range Function Iterating Over Indexes Challenge Nested Loops Capstone Challenge Challenge Recap

6. Functions

Built-in Functions User Defined Functions Challenge Functions with no `return`Modifying Functions Capstone Challenge Recap

Modifying Functions

In programming, functions are not just static blocks of code — they can be flexible and adaptable, capable of handling different situations and requirements. Modifying functions can make them more powerful and easier to use in a variety of contexts. In this chapter, we explore key techniques for modifying functions, such as using default arguments, keyword arguments, and handling variable-length arguments.

Now, let’s dive into a demonstration where we’ll explore how to modify functions to make them more flexible and powerful in our grocery store management system:

Default Arguments

Default arguments are a powerful feature in Python that allow you to define default values for function parameters.

In the apply_discount function, the discount parameter is set to 0.10 by default. Since the function applies a 10% discount by default, we can call the apply_discount function with only one parameter, the price, as you see in the default_discount_price variable. However, we can override the default value and call the apply_discount function with values assigned to both the price and discount (e.g., 0.20 for 20%) as seen in the custom_discount_price variable.


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def apply_discount(price, discount=0.10):
    discounted_price = price * (1 - discount)
    return discounted_price

# Calling the function without specifying a discount (uses default)
default_discount_price = apply_discount(100)
print(f"Price after default discount: ${default_discount_price}")

# Calling the function with a custom discount
custom_discount_price = apply_discount(100, 0.20)
print(f"Price after custom discount: ${custom_discount_price}")

Keyword Arguments

Keyword arguments in Python let you pass arguments by explicitly naming each parameter, making function calls more self-explanatory and flexible. This approach is especially useful when a function has many parameters or when the order of arguments might be unclear. In this example, the price and discount are specified, while tax is left at its default value, allowing for flexibility without sacrificing clarity.


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def calculate_total(price, discount, tax=0.05):
    total = price * (1 + tax) * (1 - discount)
    return total

# Calling the function with keyword arguments
total_cost = calculate_total(price=100, discount=0.15)
print(f"Total cost after discount: ${total_cost}")

Tarea

In this challenge, you'll complete the function generate_receipt to manage grocery store receipts. This function will use default arguments to calculate and display the total cost of items, including tax.

Task:

Define the Default Parameter: Complete the function signature by adding a tax_rate parameter with a default value of 0.07.

Tarea

Task:

Define the Default Parameter: Complete the function signature by adding a tax_rate parameter with a default value of 0.07.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

Sección 6. Capítulo 5

Modifying Functions

Now, let’s dive into a demonstration where we’ll explore how to modify functions to make them more flexible and powerful in our grocery store management system:

Default Arguments

Default arguments are a powerful feature in Python that allow you to define default values for function parameters.


              1234567891011
            
def apply_discount(price, discount=0.10):
    discounted_price = price * (1 - discount)
    return discounted_price

# Calling the function without specifying a discount (uses default)
default_discount_price = apply_discount(100)
print(f"Price after default discount: ${default_discount_price}")

# Calling the function with a custom discount
custom_discount_price = apply_discount(100, 0.20)
print(f"Price after custom discount: ${custom_discount_price}")

Keyword Arguments


              1234567
            
def calculate_total(price, discount, tax=0.05):
    total = price * (1 + tax) * (1 - discount)
    return total

# Calling the function with keyword arguments
total_cost = calculate_total(price=100, discount=0.15)
print(f"Total cost after discount: ${total_cost}")

Tarea

Task:

Define the Default Parameter: Complete the function signature by adding a tax_rate parameter with a default value of 0.07.

Tarea

Task:

Define the Default Parameter: Complete the function signature by adding a tax_rate parameter with a default value of 0.07.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

Sección 6. Capítulo 5

Modifying Functions

Now, let’s dive into a demonstration where we’ll explore how to modify functions to make them more flexible and powerful in our grocery store management system:

Default Arguments

Default arguments are a powerful feature in Python that allow you to define default values for function parameters.


              1234567891011
            
def apply_discount(price, discount=0.10):
    discounted_price = price * (1 - discount)
    return discounted_price

# Calling the function without specifying a discount (uses default)
default_discount_price = apply_discount(100)
print(f"Price after default discount: ${default_discount_price}")

# Calling the function with a custom discount
custom_discount_price = apply_discount(100, 0.20)
print(f"Price after custom discount: ${custom_discount_price}")

Keyword Arguments


              1234567
            
def calculate_total(price, discount, tax=0.05):
    total = price * (1 + tax) * (1 - discount)
    return total

# Calling the function with keyword arguments
total_cost = calculate_total(price=100, discount=0.15)
print(f"Total cost after discount: ${total_cost}")

Tarea

Task:

Define the Default Parameter: Complete the function signature by adding a tax_rate parameter with a default value of 0.07.

Tarea

Task:

Define the Default Parameter: Complete the function signature by adding a tax_rate parameter with a default value of 0.07.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

Now, let’s dive into a demonstration where we’ll explore how to modify functions to make them more flexible and powerful in our grocery store management system:

Default Arguments

Default arguments are a powerful feature in Python that allow you to define default values for function parameters.


              1234567891011
            
def apply_discount(price, discount=0.10):
    discounted_price = price * (1 - discount)
    return discounted_price

# Calling the function without specifying a discount (uses default)
default_discount_price = apply_discount(100)
print(f"Price after default discount: ${default_discount_price}")

# Calling the function with a custom discount
custom_discount_price = apply_discount(100, 0.20)
print(f"Price after custom discount: ${custom_discount_price}")

Keyword Arguments


              1234567
            
def calculate_total(price, discount, tax=0.05):
    total = price * (1 + tax) * (1 - discount)
    return total

# Calling the function with keyword arguments
total_cost = calculate_total(price=100, discount=0.15)
print(f"Total cost after discount: ${total_cost}")

Tarea

Task:

Define the Default Parameter: Complete the function signature by adding a tax_rate parameter with a default value of 0.07.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

Sección 6. Capítulo 5

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones