print math.floor(5.5)

with open('abc.txt','r+') as f:

  lines = f.readlines()

  for item in lines:

    print(item)

def fun(x,y=2,z=4):

  return x*y+z

a=fun(z=1,y=3,x=4)

print(a)

list1 = [[1,2,3],[4,5,6],[7,8,9]]

list2 = [[0,0,0],[0,0,0],[0,0,0]]

for i in range(3):

  for j in range(3):

    list2[j][i] = list1[i][j]