Chapter 10: Problem 12

What does the keys method return?

Short Answer

Expert verified

Answer: The "keys" method in Python is used with dictionaries to retrieve a set-like view object containing all the keys present in the dictionary. Here is a step-by-step example: 1. Create a dictionary: ```python my_dict = {'apple': 1, 'banana': 2, 'orange': 3} ``` 2. Retrieve the keys using the 'keys' method: ```python keys_object = my_dict.keys() ``` 3. Convert the keys object to a list: ```python keys_list = list(keys_object) ``` 4. Print the list of keys: ```python print(keys_list) ``` This will output the list of keys: ['apple', 'banana', 'orange'].

Step by step solution

Create a dictionary

First, create a Python dictionary with some keys and values. A dictionary, or "dict", in Python is a data structure that stores values mapped to unique keys. To create a dictionary, use the curly brackets {} and separate the keys and values with a colon. Here's an example dictionary: ```python my_dict = {'apple': 1, 'banana': 2, 'orange': 3} ```

Retrieve the keys using the 'keys' method

Using the 'keys' method, you can retrieve the keys of the my_dict dictionary. To do this, call the 'keys()' method on the dictionary: ```python keys_object = my_dict.keys() ```

Convert the keys object to a list

The 'keys' method returns a view object, which is a set-like object containing the dictionary's keys. To convert it to a list, you can use the 'list()' function: ```python keys_list = list(keys_object) ``` Now, 'keys_list' will contain the list of keys from the dictionary: ['apple', 'banana', 'orange'].

Print the list of keys

To see the result, you can print the list of keys: ```python print(keys_list) ``` This should output: ``` ['apple', 'banana', 'orange'] ``` This means the 'keys' method in Python returns a set-like view object containing all the keys in the dictionary, which can be easily converted to a list for further processing or display.

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What does the keys method return?

Short Answer

Step by step solution

Create a dictionary

Retrieve the keys using the 'keys' method

Convert the keys object to a list

Print the list of keys

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