Display a certain vector in a 2D list

Question

I have the following problem:

• I have a 2D vector and wish to display only the first vector ([250, 27.65863337187866, 93.38094023943002, 27.65863337187866]).

• I wrote a code, but it’s showing everything.

• Below the code:

---

lista_1 = [[250, 27.65863337187866, 93.38094023943002, 27.65863337187866], [0, 392, 327, 30, 348, 12, 64, 324]]

for i in lista_1:
    print (i)

---

Where am I going wrong?

Grateful for the help.

Answer 1

I may have misunderstood, but if you only want to access the first vector go to the index of that vector on the shortlist:

lista_1 = [[250, 27.65863337187866, 93.38094023943002, 27.65863337187866], [0, 392, 327, 30, 348, 12, 64, 324]]
print(lista[0]) #[250, 27.65863337187866, 93.38094023943002, 27.65863337187866]

In this case, it is the first internal vector, so it is in the index 0

When you do:

for i in lista_1:
    print (i)

You’re going through the entire list printing each internal vector around the loop, printing them all.