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Python: Sort a list of lists by a given index of the inner list

Python List: Exercise - 116 with Solution

Write a Python program to sort a list of lists by a given index of the inner list.

Sample Solution:

Python Code:

from operator import itemgetter
def index_on_inner_list(list_data, index_no):
    result = sorted(list_data, key=itemgetter(index_no))
    return result
students = [('Greyson Fulton', 98, 99), ('Brady Kent', 97, 96), ('Wyatt Knott', 91, 94), ('Beau Turnbull', 94, 98)] 
print ("Original list:")
print(students)
index_no = 0
print("\nSort the said list of lists by a given index","( Index = ",index_no,") of the inner list")
print(index_on_inner_list(students, index_no))
index_no = 2
print("\nSort the said list of lists by a given index","( Index = ",index_no,") of the inner list")
print(index_on_inner_list(students, index_no))

Sample Output:

Original list:
[('Greyson Fulton', 98, 99), ('Brady Kent', 97, 96), ('Wyatt Knott', 91, 94), ('Beau Turnbull', 94, 98)]

Sort the said list of lists by a given index ( Index =  0 ) of the inner list
[('Beau Turnbull', 94, 98), ('Brady Kent', 97, 96), ('Greyson Fulton', 98, 99), ('Wyatt Knott', 91, 94)]

Sort the said list of lists by a given index ( Index =  2 ) of the inner list
[('Wyatt Knott', 91, 94), ('Brady Kent', 97, 96), ('Beau Turnbull', 94, 98), ('Greyson Fulton', 98, 99)]

Pictorial Presentation:

Python List: Sort a list of lists by a given index of the inner list.
Python List: Sort a list of lists by a given index of the inner list.

Flowchart:

Flowchart: Sort a list of lists by a given index of the inner list.

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Python Code Editor:

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Previous: Write a Python program to check if the elements of a given list are unique or not.
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Python: Tips of the Day

Returns True if the provided function returns True for every element in the list, False otherwise:

Example:

def tips_every(lst, fn=lambda x: x):
  return all(map(fn, lst))

print(tips_every([2, 4, 3], lambda x: x > 1))
print(tips_every([1, 2, 3]))

Output:

True
True