Syntax error Python Program to Sort Matrix Rows by summation of consecutive difference of elements

Python Program to Sort Matrix Rows by summation of consecutive difference of elements

Example

Below is a demonstration of the same

def diff_summation_elem(row):
   return sum([abs(row[index + 1] - row[index]) for index in range(0, len(row) - 1)])

my_list = [[97, 6, 47, 3], [6, 88, 3, 26], [71, 53, 34, 65], [15, 36, 5,62]]

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

my_list.sort(key=diff_summation_elem)

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

Output

The list is :
[[97, 6, 47, 3], [6, 88, 3, 26], [71, 53, 34, 65], [15, 36, 5, 62]]
The resultant list is :
[[71, 53, 34, 65], [15, 36, 5, 62], [97, 6, 47, 3], [6, 88, 3, 26]]

Explanation

  • A method named ‘diff_summation_elem’ is defined that takes a list as a parameter.

  • It uses the ‘abs’ method and the ‘sum’ method along with list comprehension to iterate over the list and get specific index values.

  • Outside the method, a list of list is defined and is displayed on the console.

  • The list is sorted based on the key being the method (previously defined).

  • The output is displayed on the console.

Updated on: 2021-09-14T10:31:43+05:30

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