Course Content

Introduction to Python (copy)

1. Getting Started

First Steps Comments Simple Math: Add & Subtract Simple Math: Multiply & Divide Recap

2. Variables and Types

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

3. Conditional Statements

Boolean Data Type Combining Conditions Challenge: Boolean Logic Membership Operators and Type Comparisons Conditional Expressions Challenge: Product Management Capstone Recap

4. Other Data Types

Lists and List Methods Nested Lists Challenge: List Management Tuples and Tuple Methods Tuple Operations Challenge: Tuple Operations Dictionaries and Dictionary Methods Challenge: Pricing Adjustment Capstone Recap

5. Loops

For Loops While Loops Range Function Iterating Over Indexes Challenge: Sales and Shipments Nested Loops Challenge: Automating Stock Control Challenge: Solo Coding Capstone Recap

6. Functions

Built-in Functions Challenge: Zip and Sort Functions User Defined Functions List Behavior in Functions Functions with no Return Modifying Functions Challenge: Product Revenues Capstone Recap

Tuple Operations

While tuples themselves cannot be altered, Python provides operations to create and combine them effectively.

Creation

The tuple() function creates a tuple from an iterable object (strings, sets, lists), allowing for the conversion of lists or other iterables into tuples.

Concatenation

You can join two or more tuples into a new tuple using the + operator, allowing you to combine data sequentially without altering the original tuples.

Note

Remember, that to use tuple methods, like count() and index(), you will need to use dot notation, just as we did with list methods.

Let's explore how we can utilize the tuple constructor, concatenation, and tuple methods in a practical application.

Example Application

Imagine you have lists storing items that went on sale over the past 3 months. You need to convert them to tuples, concatenate the tuples, and then determine how many times an item has been put on sale in the last quarter. You also need to determine the index position to locate the first occurrence of an item.


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# Define lists with items that have been put on sale, recording each sale occurrence for different months
janSales_list = ["apples", "oranges", "apples"]
febSales_list = ["bananas", "oranges", "bananas"]
marSales_list = ["apples", "bananas", "apples"]

# Convert the lists to tuples to ensure immutability (unchangeable) 
janSales = tuple(janSales_list)
febSales = tuple(febSales_list)
marSales = tuple(marSales_list)

# Concatenate all monthly sales into a single tuple for the quarter
quarterlySales = janSales + febSales + marSales
print("Consolidated quarterly sales:", quarterlySales)

# Use the `count()` method to determine how many times "apples" have been on sale during the quarter
apples_sale_count = quarterlySales.count("apples")
print("Apples have been on sale:", apples_sale_count, "times.")

# Use the `index()` method to find the first occurrence of "apples" in the quarterly sales
first_apple_sale_index = quarterlySales.index("apples")
print("The first sale of apples this quarter was at index:", first_apple_sale_index)

Task

Swipe to start coding

Manage the contents of a grocery store shelf using tuples, ensuring data integrity and performing some analytical checks.

Convert the list shelf1_update of new items to a tuple called shelf1_update_tuple.
Concatenate shelf1_update_tuple with the existing tuple shelf1 to create a new tuple shelf1_concat.
Count how many times "celery" appears in shelf1_concat and store the result in celery_count.
Find the index of the first occurrence of "celery" in shelf1_concat and store it in celery_index.

Output Requirements

Print the updated shelf contents: "Updated Shelf #1: <$shelf1_concat>".
Print the count of "celery": "Number of Celery: <$celery_count>".
Print the index of the first occurrence of "celery": "Celery Index: <$celery_index>".

Solution

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Section 4. Chapter 5

Tuple Operations

While tuples themselves cannot be altered, Python provides operations to create and combine them effectively.

Creation

The tuple() function creates a tuple from an iterable object (strings, sets, lists), allowing for the conversion of lists or other iterables into tuples.

Concatenation

You can join two or more tuples into a new tuple using the + operator, allowing you to combine data sequentially without altering the original tuples.

Note

Remember, that to use tuple methods, like count() and index(), you will need to use dot notation, just as we did with list methods.

Let's explore how we can utilize the tuple constructor, concatenation, and tuple methods in a practical application.

Example Application


              123456789101112131415161718192021
            
# Define lists with items that have been put on sale, recording each sale occurrence for different months
janSales_list = ["apples", "oranges", "apples"]
febSales_list = ["bananas", "oranges", "bananas"]
marSales_list = ["apples", "bananas", "apples"]

# Convert the lists to tuples to ensure immutability (unchangeable) 
janSales = tuple(janSales_list)
febSales = tuple(febSales_list)
marSales = tuple(marSales_list)

# Concatenate all monthly sales into a single tuple for the quarter
quarterlySales = janSales + febSales + marSales
print("Consolidated quarterly sales:", quarterlySales)

# Use the `count()` method to determine how many times "apples" have been on sale during the quarter
apples_sale_count = quarterlySales.count("apples")
print("Apples have been on sale:", apples_sale_count, "times.")

# Use the `index()` method to find the first occurrence of "apples" in the quarterly sales
first_apple_sale_index = quarterlySales.index("apples")
print("The first sale of apples this quarter was at index:", first_apple_sale_index)

Task

Swipe to start coding

Manage the contents of a grocery store shelf using tuples, ensuring data integrity and performing some analytical checks.

Convert the list shelf1_update of new items to a tuple called shelf1_update_tuple.
Concatenate shelf1_update_tuple with the existing tuple shelf1 to create a new tuple shelf1_concat.
Count how many times "celery" appears in shelf1_concat and store the result in celery_count.
Find the index of the first occurrence of "celery" in shelf1_concat and store it in celery_index.

Output Requirements

Print the updated shelf contents: "Updated Shelf #1: <$shelf1_concat>".
Print the count of "celery": "Number of Celery: <$celery_count>".
Print the index of the first occurrence of "celery": "Celery Index: <$celery_index>".

Solution

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Everything was clear?

Thanks for your feedback!

Section 4. Chapter 5

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