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Python: Sort a given mixed list of integers and strings using lambda

Python Lambda: Exercise-47 with Solution

Write a Python program to sort a given mixed list of integers and strings using lambda. Numbers must be sorted before strings.

Sample Solution:

Python Code :

def sort_mixed_list(mixed_list):
    mixed_list.sort(key=lambda e: (isinstance(e, str), e))
    return mixed_list
mixed_list = [19,'red',12,'green','blue', 10,'white','green',1]
print("Original list:")
print(mixed_list)
print("\nSort the said  mixed list of integers and strings:")
print(sort_mixed_list(mixed_list))

Sample Output:

Original list:
[19, 'red', 12, 'green', 'blue', 10, 'white', 'green', 1]

Sort the said  mixed list of integers and strings:
[1, 10, 12, 19, 'blue', 'green', 'green', 'red', 'white']

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Previous: Write a Python program to find index position and value of the maximum and minimum values in a given list of numbers using lambda.

Next: Write a Python program to sort a given list of strings(numbers) numerically 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