Python: len() of unknown numpy array column length

Question

I'm currently trying to learn Python and Numpy. The task is to determine the length of individual columns of an imported CSV file.

So far I have:

import numpy as np
data = np.loadtxt("assignment5_data.csv", delimiter = ',')
print (data.shape[:])

Which returns:

(62, 2)

Is there a way to iterate through each column to count [not is.nan]?

Answer 1

If I understand correctly, and you are trying to get the length of non-nan values in each column, use:

np.sum(~np.isnan(data),axis=0)