In This Exercise, You Will Be Given A Shopping List And An Item. Return True If The Item Is On The Shopping List, Otherwise Return False.Example:- `shopping_list([milk, eggs, bread], milk)` --> `True`- `shopping_list([milk, eggs, bread],

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Introduction

In this exercise, we will be creating a function that checks if a given item is present in a shopping list. This function will take two parameters: the shopping list and the item to be checked. It will return True if the item is found in the shopping list and False otherwise.

Problem Statement

Given a shopping list and an item, return True if the item is on the shopping list, otherwise return False.

Example Use Cases

  • shopping_list(["milk", "eggs", "bread"], "milk") --> True
  • shopping_list(["milk", "eggs", "bread"], "cheese") --> False

Solution

To solve this problem, we can use a simple function in Python that checks if the item is present in the shopping list. Here's a step-by-step guide to creating this function:

Step 1: Define the Function

We will define a function called shopping_list that takes two parameters: shopping_list and item.

def shopping_list(shopping_list, item):

Step 2: Check if the Item is Present in the Shopping List

We will use the in operator in Python to check if the item is present in the shopping list. The in operator returns True if the item is found in the shopping list and False otherwise.

    return item in shopping_list

Step 3: Return the Result

We will return the result of the in operator, which will be True if the item is found in the shopping list and False otherwise.

def shopping_list(shopping_list, item):
    return item in shopping_list

Example Use Cases

Here are some example use cases of the shopping_list function:

print(shopping_list(["milk", "eggs", "bread"], "milk"))  # Output: True
print(shopping_list(["milk", "eggs", "bread"], "cheese"))  # Output: False
print(shopping_list(["milk", "eggs", "bread"], "eggs"))  # Output: True
print(shopping_list(["milk", "eggs", "bread"], "bread"))  # Output: True

Advantages of the Solution

The solution has the following advantages:

  • It is simple and easy to understand.
  • It uses the in operator, which is a built-in operator in Python that checks if an item is present in a list.
  • It returns True if the item is found in the shopping list and False otherwise.

Disadvantages of the Solution

The solution has the following disadvantages:

  • It assumes that the shopping list is a list of strings.
  • It does not handle cases where the shopping list is not a list or the item is not a string.

Conclusion

In this exercise, we created a function called shopping_list that checks if a given item is present in a shopping list. The function uses the in operator to check if the item is present in the shopping list and returns True if the item is found and False otherwise. The solution has the advantages of being simple and easy to understand, using the in operator, and returning the correct result. However, it assumes that the shopping list is a list of strings and does not handle cases where the shopping list is not a list or the item is not a string.

Code

Here is the complete code for the shopping_list function:

def shopping_list(shopping_list, item):
    return item in shopping_list

Testing the Code

Here are some example use cases of the shopping_list function:

print(shopping_list(["milk", "eggs", "bread"], "milk"))  # Output: True
print(shopping_list(["milk", "eggs", "bread"], "cheese"))  # Output: False
print(shopping_list(["milk", "eggs", "bread"], "eggs"))  # Output: True
print(shopping_list(["milk", "eggs", "bread"], "bread"))  # Output: True
```<br/>
**Shopping List Checker Q&A**
==========================

**Introduction**
---------------

In our previous article, we created a function called `shopping_list` that checks if a given item is present in a shopping list. In this article, we will answer some frequently asked questions about the `shopping_list` function.

**Q: What is the purpose of the `shopping_list` function?**
---------------------------------------------------

A: The purpose of the `shopping_list` function is to check if a given item is present in a shopping list. It returns `True` if the item is found in the shopping list and `False` otherwise.

**Q: How does the `shopping_list` function work?**
------------------------------------------------

A: The `shopping_list` function uses the `in` operator to check if the item is present in the shopping list. The `in` operator returns `True` if the item is found in the shopping list and `False` otherwise.

**Q: What are the advantages of the `shopping_list` function?**
---------------------------------------------------------

A: The advantages of the `shopping_list` function are:

*   It is simple and easy to understand.
*   It uses the `in` operator, which is a built-in operator in Python that checks if an item is present in a list.
*   It returns `True` if the item is found in the shopping list and `False` otherwise.

**Q: What are the disadvantages of the `shopping_list` function?**
---------------------------------------------------------

A: The disadvantages of the `shopping_list` function are:

*   It assumes that the shopping list is a list of strings.
*   It does not handle cases where the shopping list is not a list or the item is not a string.

**Q: How can I use the `shopping_list` function in my code?**
---------------------------------------------------------

A: You can use the `shopping_list` function in your code by calling it with the shopping list and the item as arguments. For example:

```python
print(shopping_list(["milk", "eggs", "bread"], "milk"))  # Output: True
print(shopping_list(["milk", "eggs", "bread"], "cheese"))  # Output: False

Q: Can I modify the shopping_list function to handle cases where the shopping list is not a list or the item is not a string?

A: Yes, you can modify the shopping_list function to handle cases where the shopping list is not a list or the item is not a string. You can add error checking code to handle these cases. For example:

def shopping_list(shopping_list, item):
    if not isinstance(shopping_list, list):
        raise ValueError("Shopping list must be a list")
    if not isinstance(item, str):
        raise ValueError("Item must be a string")
    return item in shopping_list

Q: Can I use the shopping_list function with a shopping list that contains duplicate items?

A: Yes, you can use the shopping_list function with a shopping list that contains duplicate items. The in operator will return True if the item is found in the shopping list, regardless of whether it is a duplicate or not.

Q: Can I use the shopping_list function with a shopping list that contains non-string items?

A: No, you cannot use the shopping_list function with a shopping list that contains non-string items. The shopping_list function assumes that the shopping list is a list of strings, and it will raise a ValueError if it encounters a non-string item.

Conclusion

In this article, we answered some frequently asked questions about the shopping_list function. We discussed the purpose and advantages of the function, as well as its disadvantages and limitations. We also provided examples of how to use the function in your code and how to modify it to handle cases where the shopping list is not a list or the item is not a string.