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Python – Sort by range inclusion
  • Last Updated : 12 Nov, 2020

Given a range, sort tuple Matrix by total range covered in a given range. [Considering tuples which completely lie within range].

Input : test_list = [[(1, 5), (6, 10), (10, 15)], [(3, 16)], [(2, 4), (6, 8), (9, 14)], [(1, 3), (9, 13)]], i, j = 2, 15 
Output : [[(3, 16)], [(1, 5), (6, 10), (10, 15)], [(1, 3), (9, 13)], [(2, 4), (6, 8), (9, 14)]] 
Explanation : 0 < 4 < 4 < 9, is the magnitude of range covered in tuples lists.

Input : test_list = [[(1, 5), (6, 10), (10, 15)], [(3, 16)], [(2, 4), (6, 8), (9, 14)]], i, j = 2, 15 
Output : [[(3, 16)], [(1, 5), (6, 10), (10, 15)], [(2, 4), (6, 8), (9, 14)]] 
Explanation : 0 < 4 < 9, is the magnitude of range covered in tuples lists. 

Method #1 : Using sort() + sum()

In this, inplace sorting is performed using sort(), and summation of ranges in the given range is performed using sum() and list comprehension with conditions.



Python3




# Python3 code to demonstrate working of
# Sort by range inclusion
# Using sort() + sum()
  
  
def range_sum(row):
  
    # summing in range element
    return sum([abs(sub[1] - sub[0]) for sub in row if sub[0] > i and sub[0] < j and sub[1] > i and sub[1] < j])
  
  
# initializing list
test_list = [[(1, 5), (6, 10), (10, 15)], [(3, 16)], [
    (2, 4), (6, 8), (9, 14)], [(1, 3), (9, 13)]]
  
# printing original list
print("The original list is : " + str(test_list))
  
# initializing range
i, j = 2, 15
  
# inplace sorting using sort()
test_list.sort(key=range_sum)
  
# printing result
print("Sorted List : " + str(test_list))

Output:

The original list is : [[(1, 5), (6, 10), (10, 15)], [(3, 16)], [(2, 4), (6, 8), (9, 14)], [(1, 3), (9, 13)]]
Sorted List : [[(3, 16)], [(1, 5), (6, 10), (10, 15)], [(1, 3), (9, 13)], [(2, 4), (6, 8), (9, 14)]]

Method #2 : Using sorted() + lambda + sum()

In this, we perform task of sorting using sorted() and utility injection using lambda function, the summation is performed using sum().

Python3




# Python3 code to demonstrate working of
# Sort by range inclusion
# Using sorted() + lambda + sum()
  
# initializing list
test_list = [[(1, 5), (6, 10), (10, 15)], [(3, 16)], [
    (2, 4), (6, 8), (9, 14)], [(1, 3), (9, 13)]]
  
# printing original list
print("The original list is : " + str(test_list))
  
# initializing range
i, j = 2, 15
  
# sorting using sorted() + lambda
res = sorted(test_list, key=lambda row: sum(
    [abs(sub[1] - sub[0]) for sub in row if sub[0] > i and sub[0] < j and sub[1] > i and sub[1] < j]))
  
# printing result
print("Sorted List : " + str(res))

Output:

The original list is : [[(1, 5), (6, 10), (10, 15)], [(3, 16)], [(2, 4), (6, 8), (9, 14)], [(1, 3), (9, 13)]]
Sorted List : [[(3, 16)], [(1, 5), (6, 10), (10, 15)], [(1, 3), (9, 13)], [(2, 4), (6, 8), (9, 14)]]

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