Efficient way to convert delimiter separated string to numpy array

Question

I have a String as follows :

1|234|4456|789

I have to convert it into numpy array.I would like to know the most efficient way.Since I will

Answer 1

Try this:

import numpy as np
s = '1|234|4456|789'
array = np.array([int(x) for x in s.split('|')])

... Assuming that the numbers are all ints. if not, replace int with float in the above snippet of code.

EDIT 1:

Alternatively, you can do this, it will only create one intermediate list (the one generated by split()):

array = np.array(s.split('|'), dtype=int)

EDIT 2:

And yet another way, possibly faster (thanks for all the comments, guys!):

array = np.fromiter(s.split("|"), dtype=int)