# Python: Sort a given matrix in ascending order according to the sum of its rows

## Python List: Exercise - 101 with Solution

Write a Python program to sort a given matrix in ascending order according to the sum of its rows.

**Sample Solution**:

**Python Code:**

```
def sort_matrix(M):
result = sorted(M, key=sum)
return result
matrix1 = [[1, 2, 3], [2, 4, 5], [1, 1, 1]]
matrix2 = [[1, 2, 3], [-2, 4, -5], [1, -1, 1]]
print("Original Matrix:")
print(matrix1)
print("\nSort the said matrix in ascending order according to the sum of its rows")
print(sort_matrix(matrix1))
print("\nOriginal Matrix:")
print(matrix2)
print("\nSort the said matrix in ascending order according to the sum of its rows")
print(sort_matrix(matrix2))
```

Sample Output:

Original Matrix: [[1, 2, 3], [2, 4, 5], [1, 1, 1]] Sort the said matrix in ascending order according to the sum of its rows [[1, 1, 1], [1, 2, 3], [2, 4, 5]] Original Matrix: [[1, 2, 3], [-2, 4, -5], [1, -1, 1]] Sort the said matrix in ascending order according to the sum of its rows [[-2, 4, -5], [1, -1, 1], [1, 2, 3]]

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**Flowchart:**

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## Python: Tips of the Day

**Decapitalizes the first letter of a string:**

Example:

def tips_decapitalize(s, upper_rest=False): return s[:1].lower() + (s[1:].upper() if upper_rest else s[1:]) print(tips_decapitalize('PythonTips')) print(tips_decapitalize('PythonTips', True))

Output:

pythonTips pYTHONTIPS

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