w3resource

Python: Store a given dictionary in a json file

Python dictionary: Exercise-39 with Solution

Write a Python program to store dictionary data in a JSON file.

Sample Solution:

Python Code:

# Create a dictionary 'd' containing information about students and teachers as a list of dictionaries.
d = {
    "students": [
        {"firstName": "Nikki", "lastName": "Roysden"},
        {"firstName": "Mervin", "lastName": "Friedland"},
        {"firstName": "Aron", "lastName": "Wilkins"}
    ],
    "teachers": [
        {"firstName": "Amberly", "lastName": "Calico"},
        {"firstName": "Regine", "lastName": "Agtarap"}
    ]
}

# Print a message indicating the start of the code section and the original dictionary.
print("Original dictionary:")
print(d)

# Print the data type of the 'd' dictionary.
print(type(d))

# Import the 'json' module to work with JSON data.
import json

# Create a new JSON file named "dictionary" and write the 'd' dictionary to it with formatting.
with open("dictionary", "w") as f:
    json.dump(d, f, indent=4, sort_keys=True)

# Print a message indicating the start of the next code section.
print("\nJson file to dictionary:")

# Open the "dictionary" JSON file and read its contents into the 'data' variable.
with open('dictionary') as f:
    data = json.load(f)

# Print the 'data' dictionary containing the JSON data from the file.
print(data) 

Sample Output:

Original dictionary:
{'students': [{'firstName': 'Nikki', 'lastName': 'Roysden'}, {'firstName': 'Mervin', 'lastName': 'Friedland'}, {'firstName': 'Aron ', 'lastName': 'Wilkins'}], 'teachers': [{'firstName': 'Amberly', 'lastName': 'Calico'}, {'firstName': 'Regine', 'lastName': 'Agtarap'}]}
<class 'dict'>

Json file to dictionary:
{'students': [{'firstName': 'Nikki', 'lastName': 'Roysden'}, {'firstName': 'Mervin', 'lastName': 'Friedland'}, {'firstName': 'Aron ', 'lastName': 'Wilkins'}], 'teachers': [{'firstName': 'Amberly', 'lastName': 'Calico'}, {'firstName': 'Regine', 'lastName': 'Agtarap'}]}

Flowchart:

Flowchart: Store a given dictionary in a json file

Python Code Editor:

Previous: Write a Python program to match key values in two dictionaries.
Next: Write a Python program to create a dictionary of keys x, y, and z where each key has as value a list from 11-20, 21-30, and 31-40 respectively. Access the fifth value of each key from the dictionary.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Become a Patron!

Follow us on Facebook and Twitter for latest update.

It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.

https://198.211.115.131/python-exercises/dictionary/python-data-type-dictionary-exercise-39.php