Python – Sort by range inclusion

When it is required to sort the list based on range, the ‘abs’ method, the ‘sum’ method and the list comprehension are used using a function.

Below is a demonstration of the same −

Example

 Live Demo

def sum_range_incl(my_row):

   return sum([abs(element [1] - element [0]) for element in my_row if element [0] > i and element [0] < j and element [1] > i and element [1] < j])

my_list = [[(12, 4), (55, 10), (11, 16)], [(42, 14)], [(2, 5), (2, 28), (9, 16)], [(12, 6), (6, 13)]]

print("The list is :")
print(my_list)

i, j = 2, 15

my_list.sort(key=sum_range_incl)

print("The resultant list is :")
print(my_list)

Output

The list is :
[[(12, 4), (55, 10), (11, 16)], [(42, 14)], [(2, 5), (2, 28), (9, 16)], [(12, 6), (6, 13)]]
The resultant list is :
[[(42, 14)], [(2, 5), (2, 28), (9, 16)], [(12, 4), (55, 10), (11, 16)], [(12, 6), (6, 13)]]

Explanation

• A method named ‘sum_range_incl’ is defined that takes a list of tuple as a parameter.

• The list is iterated over using list comprehension.

• The absolute difference between first and zeroth element is determined for all elements in the list, and the zeroth element is compared to specific integers.

• The sum of this value is returned as output of the function.

• A list of list of tuple is defined and is displayed on the console.

• The values for two integers ‘I’ and ‘j’ are defined.

• The list is sorted using the sort method by passing the previously defined method as the parameter.

• The output is displayed on the console.