Python Add an Item to an Array

Question

I have an ndarray that looks like this:

In  [1]: a
Out [1]: array(['x','y'], dtype=object)

Now I wanted to append a "z" to the end of it:

In  [2]: print([a,'z'])
[array(['x','y'],dtype=object), 'z']

Instead, what I want is:

['x','y','z']

Any idea?

Answer 1

You can do it using numpy.append:

import numpy as np

a = np.array(['x','y'])

b = np.append(a,['z'])

In [8]:b
Out[8]: array(['x', 'y', 'z'], dtype='<U1')

Answer 2

You can use numpy.append:

import numpy as np
a = np.array(['x', 'y'])

np.append(a, 'z')
# array(['x', 'y', 'z'], 
#       dtype='<U1')