Convert a numpy array to a CSV string and a CSV string back to a numpy array

Question

I have to convert a numpy array of floats to a string (to store in a SQL DB) and then also convert the same string back into a numpy float array.

This is how I\'m go

Answer 1

First you should use join this way to avoid the last comma issue:

VIstring = ','.join(['%.5f' % num for num in VI])

Then to read it back, use numpy.fromstring:

np.fromstring(VIstring, sep=',')