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: Split a given dictionary of lists into list of dictionaries using map function

Python map: Exercise-15 with Solution

Write a Python program to split a given dictionary of lists into list of dictionaries using map function.

Sample Solution:

Python Code:

def list_of_dicts(marks):
    result = map(dict, zip(*[[(key, val) for val in value] for key, value in marks.items()]))
    return list(result)
marks = {'Science': [88, 89, 62, 95], 'Language': [77, 78, 84, 80]}
print("Original dictionary of lists:")
print(marks)
print("\nSplit said dictionary of lists into list of dictionaries:")
print(list_of_dicts(marks))

Sample Output:

Original dictionary of lists:
{'Science': [88, 89, 62, 95], 'Language': [77, 78, 84, 80]}

Split said dictionary of lists into list of dictionaries:
[{'Science': 88, 'Language': 77}, {'Science': 89, 'Language': 78}, {'Science': 62, 'Language': 84}, {'Science': 95, 'Language': 80}]

Python Code Editor:

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

Previous: Write a Python program to interleave two given list into another list randomly using map() function.
Next: Write a Python program to convert a given list of strings into list of lists using map function.

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