Element-wise string concatenation in numpy

Question

Is this a bug?

import numpy as np
a1=np.array([\'a\',\'b\'])
a2=np.array([\'E\',\'F\'])

In [20]: add(a1,a2)
Out[20]: NotImplemented

I am t

Answer 1

This can be done using numpy.core.defchararray.add. Here is an example:

>>> import numpy as np
>>> a1 = np.array(['a', 'b'])
>>> a2 = np.array(['E', 'F'])
>>> np.core.defchararray.add(a1, a2)
array(['aE', 'bF'], 
      dtype='

There are other useful string operations available for NumPy data types.