Python mass add of tuple items

Hello everyone,

Does anyone knows how to make a mass addition for items inside a tuple?

In red is the error message and the lines related

Runtime error (TypeErrorException): unsupported operand type(s) for +=: 'int' and 'tuple'

Traceback:

  line 64, in script

import rhinoscriptsyntax as rs

import Rhino.Geometry as geo

import math as mt

import random

import copy

list = zip(Pts,En)

a = []

No_columnas = int(div+1)

No_filas = int(length/No_columnas)

for i in range (No_filas):

    a.append(list[i*No_filas:(i+1)*No_filas])

# PARTE 1.1

# a[fila][columna][item]

a2 = copy.deepcopy(a)

fila = 0

while fila < No_filas:

        for columna in range(No_columnas):

            print '-----------------------------'

            print'Fila=',fila

            print'Columna=',columna

            print '-----------------------------'

            C = a[fila][columna]

            if fila == 0:

                a2[fila][columna] = C

            else:

                Cijk = []

                if columna > 0:

                    Cijk.append(a2[fila-1][columna-1])

                if columna < No_columnas-1:

                    Cijk.append(a2[fila-1][columna+1])

                Cijk.append(a2[fila-1][columna])

                print 'Cijk=', Cijk

                M = max(Cijk)

                print 'MAXIMO=', M

                a2[fila][columna] = C + M

        fila = fila+1

## PARTE 2.1_

fila=0

columna=0

SEAMS = []

seam = []

while columna < No_columnas:

    carga = a2[fila][columna]

    seam.append((carga,columna,fila))

    while fila < No_filas-1:

        cargas_ijk = []

        if columna > 0:

            cargas_ijk.append((a2[fila+1][columna-1],columna-1,fila+1))

        if columna < No_columnas-1:

            cargas_ijk.append((a2[fila+1][columna+1],columna+1,fila+1))

        cargas_ijk.append((a2[fila+1][columna],columna,fila+1))

        carga,columna,fila = max(cargas_ijk)

        seam.append((carga,columna,fila))

    Mass_add = 0

    for i,v in enumerate(seam):

        Mass_add += v[0]

    seam.append(Mass_add)

    SEAMS.append(seam)

    seam = []

    fila = 0

    columna = len(SEAMS)