ΘΕΜΑ: υπολογισμος αθροισματος πινακα 5x5

for i in range(5):
    for j in range(5):
        print(i, j)

import random
 
tyxaioi = []
for i in range(5):
    grammi = []
    for j in range(5):
        grammi.append(random.randint(1,10))
    tyxaioi.append(grammi)
 
a=open("a.txt","w")
for i in range(5):
    g=""
    for j in range(5):
        g += str(tyxaioi[i][j]) + " "
    g+= "\n"
    a.write(g)
a.close()
 
a=open("a.txt","r")
print(a.read())
a.close()

athroisma = 0
for i in range(10):
    athroisma += i
print(athroisma)

tyxaioi[i][j]