How to count same strings in numpy array?

Question

I have a numpy array from strings and I want to count the same strings. Is it possible? Here is my code:

import numpy as np
import sys
arr = np.array(sys.stdin.read().split(), dtype = '>U20')
print(arr)

What do you mean "count the strings"? Do you want len(arr)? — FHTMitchell
– FHTMitchell, Commented Apr 3, 2018 at 12:35
I believe what you are looking for is collections.Counter(). — IMCoins
– IMCoins, Commented Apr 3, 2018 at 12:36
I have a array from words and it has many same words, I need to count them — Danya
– Danya, Commented Apr 5, 2018 at 11:00

Vikas Periyadath · Accepted Answer · 2018-04-03 12:37:15Z

4

Try this :

import collections, numpy

collections.Counter(arr)

Or

unique, counts = numpy.unique(arr, return_counts=True)
dict(zip(unique, counts))

answered Apr 3, 2018 at 12:37

Vikas Periyadath

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1 Comment

Thanks, it's all I need