How to write data from a .txt file into an array?

[k voller]

Hi, I currently have a .txt file containing xyz coordinates of 10 particles which looks like:

1.0,2.0,3.0
4.0,5.0,6.0
...
8.0,9.0,10.0

and I want to turn this into an array which is the same shape as the data in the .txt file ie there would be 3 colums representing x,y,z coords and 10 rows representing the 10 particles. Im quite new to python so any help on how to do this would be great

[bvdet]

Read the file, parse into a list of lists, type cast to float, initialize new array, iterate on data and add each number to array.

dataList = [[float(s) for s in item.strip().split(",")] for item in open("numpytest.txt").readlines()]
rows = len(dataList)
cols = len(dataList[0])
arr1 = N.zeros([rows,cols], dtype=N.float64)
for i, row in enumerate(dataList):
    for j, number in enumerate(row):
        arr1[i][j] = number