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Python: Sort each sublist of strings in a given list of lists using lambda

Python Lambda: Exercise-27 with Solution

Write a Python program to sort each sublist of strings in a given list of lists using lambda.

Sample Solution:

Python Code :

def sort_sublists(input_list):
    result = [sorted(x, key = lambda x:x[0]) for x in input_list] 
    return result
color1 = [["green", "orange"], ["black", "white"], ["white", "black", "orange"]]
print("\nOriginal list:")
print(color1)  
print("\nAfter sorting each sublist of the said list of lists:")
print(sort_sublists(color1))

Sample Output:

Original list:
[['green', 'orange'], ['black', 'white'], ['white', 'black', 'orange']]

After sorting each sublist of the said list of lists:
[['green', 'orange'], ['black', 'white'], ['black', 'orange', 'white']]

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Previous: Write a Python program to create the next bigger number by rearranging the digits of a given number.
Next: Write a Python program to sort a given list of lists by length and value using lambda.

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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