Terry Reedy <tjre...@udel.edu> writes: > On 10/17/2014 6:43 AM, Cameron Simpson wrote: >> On 17Oct2014 11:45, Dhananjay <dhananjay.c.jo...@gmail.com> wrote: > >>> 2.1576318858 -1.8651195165 4.2333428278 >>> ... >>> (total of 200 lines) >>> >>> Columns 1,2,3 corresponds to x,y,z axis data points. > >> for line in open('flooding-psiphi.dat','r'): >> line = line.split() >> xs.append(float(line[0])) >> ys.append(float(line[1])) >> zs.append(float(line[2])) > > A further refinement: > for line in open('flooding-psiphi.dat','r'): > x, y, z = map(float, line.split()) > xs.append(x) > ys.append(y) > zs.append(z)
Or even: xs,ys,zs = zip(*[ map(float,line.split()) for line in open('flooding-psiphi.dat','r') ]) You get tuples, though. Use map(list,zip(...)) if you need lists. Easy to update when you move to 4D data... -- Alain. -- https://mail.python.org/mailman/listinfo/python-list