Actually, the answer of @volker-braun was quite satisfactory, since it creates a list that you can call:

```
# data you should add in your question to ease reproduction:
sage: import numpy as np
sage: N = 4
sage: A = 3
sage: L = [np.empty(A) for j in range(N)]
sage: L[0]
array([ 6.89920558e-310, 6.89920558e-310, 0.00000000e+000])
sage: L[3]
array([ 6.89920558e-310, 6.89920558e-310, 0.00000000e+000])
```

But you should notice that elements of a list L are numbered from `0`

to `len(L)-1`

.

Perhaps are you looking for a dictionary:

```
sage: L = dict()
sage: for j in srange(1, N+1):
sage: L[j]=np.empty(A)
sage: L
{1: array([ 6.89920558e-310, 5.92371271e-316, 5.43231038e-310]),
2: array([ 6.89920558e-310, 5.91607169e-316, 5.40520702e-316]),
3: array([ 6.89920558e-310, 5.91582347e-316, 5.43231038e-310]),
4: array([ 6.89920558e-310, 5.91594758e-316, 1.09178468e-316])}
sage: L[1]
array([ 6.89920558e-310, 5.92371271e-316, 5.43231038e-310])
sage: L[4]
array([ 6.89920558e-310, 5.91594758e-316, 1.09178468e-316])
```