Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

Python: Find all keys in the provided dictionary that have the given value

Python dictionary: Exercise-75 with Solution

Write a Python program to find all keys in the provided dictionary that have the given value.

Sample Solution:

Python Code:

def test(dict, val):
  return list(key for key, value in dict.items() if value == val)

students = {
  'Theodore': 19,
  'Roxanne': 20,
  'Mathew': 21,
  'Betty': 20
}

print("\nOriginal dictionary elements:")
print(students)
print("\nFind all keys in the said dictionary that have the specified value:")
print(test(students, 20))

Sample Output: 

Original dictionary elements:
{'Theodore': 19, 'Roxanne': 20, 'Mathew': 21, 'Betty': 20}

Find all keys in the said dictionary that have the specified value:
['Roxanne', 'Betty']

Flowchart:

Flowchart: Find all keys in the provided dictionary that have the given value.

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 create a dictionary with the same keys as the given dictionary and values generated by running the given function for each value.
Next: Write a Python program to combine two lists into a dictionary, where the elements of the first one serve as the keys and the elements of the second one serve as the values. The values of the first list need to be unique and hashable.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m