DSA-Matrix-Python- Minimum Path sum

Hey there, I'm participating in #hactoberfest2k21, Please assign me the issue. Good day!
Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right, which minimizes the sum of all numbers along its path.You can only move either down or right at any point in time.
Example:
Input: grid = [[1,3,1],[1,5,1],[4,2,1]]
Output: 7
