# Python multidimensional array indexing explanation Could someone please explain to me what is happening here? I understand what is happening here:&nbsp;<a href="https://docs.scipy.org/doc/numpy-1.15.0/user/basics.indexing.html#index-arrays" target="_blank">https://docs.scipy.org/doc/numpy-1.15.0/user/basics.indexing.html#index-arrays</a>, but do not understand this piece of code.

Could someone please explain to me what is happening here? I understand what is happening here: https://docs.scipy.org/doc/numpy-1.15.0/user/basics.indexing.html#index-arrays, but do not understand this piece of code.

```import numpy as np
y = np.zeros((3,3))
y = y.astype(np.int16)
y[1,1] = 1
x = np.ones((3,3))
t = (1-y).astype(np.int16)
print(t)
print(x[t])
x[(1-y).astype(np.int16)] = 0
print(x)
```

output:

```[[1 1 1]
[1 0 1]
[1 1 1]]

[[[1. 1. 1.]
[1. 1. 1.]
[1. 1. 1.]]
[[1. 1. 1.]
[1. 1. 1.]
[1. 1. 1.]]
[[1. 1. 1.]
[1. 1. 1.]
[1. 1. 1.]]]
[[0. 0. 0.]
[0. 0. 0.]
[1. 1. 1.]]
```

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