How to combine strings from 2 numpy arrays

Question

arr = [12345, 12345, 12345, 12345] paths = [67890, 67890, 67890, 67890]

How can I combine these two numpy arrays to get this output below? output = [1234567890, 1234567890, 1234567890, 1234567890]

Does this answer your question? Element-wise string concatenation in numpy — obchardon
– obchardon, Commented Jul 6, 2021 at 14:29

Nk03 · Accepted Answer · 2021-07-06 14:27:17Z

1

IIUC, here's one way:

arr_list = [arr, paths]
result = np.apply_along_axis(''.join, 0, arr_list)

answered Jul 6, 2021 at 14:27

Nk03

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3 Comments

I suspect a list comprehension with zip will be faster.

I also thought of it. But, I've not compared performance @hpaulj

numpy.char.add(arr,path) could be another option, maybe it is easier to read.