When it is required to sort matrix by total characters, a method is defined that uses list comprehension and the ‘sum’ and ‘len’ methods to determine the result.
Below is a demonstration of the same −
Example
def total_characters(row):
return sum([len(element) for element in row])
my_list = [["pyt", "is", "fun"], ["python", "fun"],["py", "4", "good"], ["python"]]
print("The list is :")
print(my_list)
my_list.sort(key=total_characters)
print("The result is :")
print(my_list)Output
The list is : [['pyt', 'is', 'fun'], ['python', 'fun'], ['py', '4', 'good'], ['python']] The result is : [['python'], ['py', '4', 'good'], ['pyt', 'is', 'fun'], ['python', 'fun']]
Explanation
A method named ’total_characters’ is defined that takes row as a parameter, and returns sum of the elements as output.
This is done by iterating over the elements using list comprehension and getting length of every element and adding these lengths.
Outside the method, a list is defined and displayed on the console.
The list is sorted and the method is called by passing the required parameter.
This result is assigned to a variable.
This is the output that is displayed on the console.