Simple Matrix Implementation

class MyMatrix:
    height = 0
    width = 0
    data = tuple()
    
    def __init__(self, data):
        self.height = len(data)
        self.width = len(data[0])
        self.data = data
        
    def add(mat1, mat2):
        if mat1.height != mat2.height or mat1.width != mat2.width:
            print("The matrices are not the same size!")
            return
        
        rows = []
        for i in range(len(mat1.data)):
            row = []
            for j in range(len(mat1.data[0])):
                row.append(mat1[i][j] + mat2[i][j])
            
            rows.append(tuple(row))
        
        return MyMatrix(tuple(rows))
    
    def subtract(mat1, mat2):
        if mat1.height != mat2.height or mat1.width != mat2.width:
            print("The matrices are not the same size!")
            return
        
        rows = []
        for i in range(len(mat1.data)):
            row = []
            for j in range(len(mat1.data[0])):
                row.append(mat1[i][j] - mat2[i][j])
            
            rows.append(tuple(row))
        
        return MyMatrix(tuple(rows))
        
    def scale(mat, scalar):
        
        rows = []
        for i in range(len(mat.data)):
            row = []
            for j in range(len(mat.data[0])):
                row.append(mat[i][j] * scalar)
            
            rows.append(tuple(row))
        
        return MyMatrix(tuple(rows))
    
    def multiply(mat1, mat2):
        if mat1.width != mat2.height:
            print("The matrix dimensions don't match up!")
            return
        
        rows = []
        for i in range(len(mat1.data)):
            row = []
            for j in range(len(mat2.data[0])):
                entry = 0
                for k in range(len(mat2.data)):
                    entry = entry + mat1.data[i][k] * mat2.data[k][j]
                
                row.append(entry)
            
            rows.append(tuple(row))
        
        return MyMatrix(tuple(rows))
    
    def transpose(mat):
        
        rows = []
        for i in range(len(mat.data[0])):
            row = []
            for j in range(len(mat.data)):
                row.append(mat[j][i])
            
            rows.append(tuple(row))
        
        return MyMatrix(tuple(rows))
            
print(2)

Python Fiddle

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