CODEWITHSUNDEEP
pythonarraysnumpy
user2129623
user2129623

Reputation: 2257

convert string value to numpy array

I want to pass csv data as argument in postman.

Which can be like

s = 2,3,4,5
s= "2,3,4,5"

This csv data is coming from some csv file. I can directly pas it like

localhost?data="2,3,4,5"

How to parse it correctly and convert it into numpy array?

I tried this

s = "2,3,4,5"
print(np.array(list(s)))

Which gives

['1' ',' '2' ',' '3' ',' '4']

which is wrong. 

d =np.fromstring(s[1:-1],sep=' ').astype(int)

Gives array([], dtype=int64) which I dont understand.

What is the correct way?

Upvotes: 1

Views: 109

Answers (3)

Rakesh
Rakesh

Reputation: 82795

You can split on comma and then use np.array

Ex:

import numpy as np

s = "2,3,4,5"
print(np.array(s.strip('"').split(",")).astype(int))

Output:

[2 3 4 5]

Upvotes: 2

J...S
J...S

Reputation: 5207

You could try np.fromstring() as in

import numpy as np
s = "2,3,4,5"
np.fromstring(s, dtype=int, sep=',')

to get output like

array([2, 3, 4, 5])

Upvotes: 4

accdias
accdias

Reputation: 5372

Here is another way:

>>> import numpy as np
>>> s='2,3,4,5'
>>> np.array([int(i) for i in s.split(',')])
array([2, 3, 4, 5])
>>>

Upvotes: 1

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