How to convert elements type in numpy array from string to int

Question

I have a numpy array which looks like this

arr = np.array([['1','2','3','4','5','6']])

For the most common way to convert, loops are required like this.

for a in arr:
   for b in a:
      int(b)

However, I would like to convert all elements in the array without loops. How could I do that?

The question title says you want to convert to string, but your example shows that you're typecasting to int? — Mercury
– Mercury, Commented Apr 10, 2020 at 20:42
Ah...my bad. I was confused. It's to convert to integer. I'm sorry. — Liu Bei
– Liu Bei, Commented Apr 11, 2020 at 0:24

Hnampk · Accepted Answer · 2020-04-10 09:23:46Z

1

You can define the type of elements at the assignment:

arr = numpy.array(['1','2','3','4','5','6'], int)

or in case, you want to parse the type of every element in an initialized array, you can use astype() method

arr.astype('int')

answered Apr 10, 2020 at 9:23

Hnampk

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