w3resource

Python: Invert a dictionary with unique hashable values

Python dictionary: Exercise-72 with Solution

Write a Python program to invert a dictionary with unique hashable values.

  • Use dictionary.items() in combination with a list comprehension to create a new dictionary with the values and keys inverted.

Sample Solution:

Python Code:

def test(students):
  return { value: key for key, value in students.items() }
 
students = {
  'Theodore': 10,
  'Mathew': 11,
  'Roxanne': 9,
}
print(test(students))

Sample Output:

{10: 'Theodore', 11: 'Mathew', 9: 'Roxanne'}

Flowchart:

Flowchart: Invert a dictionary with unique hashable values.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to retrieve the value of the nested key indicated by the given selector list from a dictionary or list.
Next: Write a Python program to convert a list of dictionaries into a list of values corresponding to the specified key.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Python: Tips of the Day

Decapitalizes the first letter of a string:

Example:

def tips_decapitalize(s, upper_rest=False):
  return s[:1].lower() + (s[1:].upper() if upper_rest else s[1:])
print(tips_decapitalize('PythonTips'))
print(tips_decapitalize('PythonTips', True)) 

Output:

pythonTips
pYTHONTIPS