Python-сообщество

-5.906259 -5.940275 -5.931177 -5.941153 -5.942855 -5.942276 -5.968357 
-6.346675 -6.592656 -6.636497 -9.060647 -9.051093 -9.060074 -9.061402 
-9.369555 -9.537909 -14.426705 -14.434151 -14.559075 -14.443018 -14.445596 
-14.448160 -14.561109 -14.563449 -14.442275 -14.444956 -14.456397 
-14.459055 -14.636674 -14.951340 -16.125837 -15.706537 -15.704659 
-17.514938 -19.711838 -20.472153 

146.890778 146.950867 145.830215 145.828659 145.840012 145.834015 
145.737946 145.206360 145.672699 145.759308 149.288788 148.527069 
148.525757 148.534805 147.197128 147.338409 143.665375 141.946259 
142.706116 141.928604 141.944229 141.959793 142.698807 142.712601 
141.937836 141.953384 141.951416 141.966904 142.685623 144.316422 
144.347321 135.554825 135.550049 138.460175 145.043198 147.982590 

61 64 79 98 81 93 64 84 61 24 78 54 98 79 47 54 54 73 73 37 98 88 
45 64 96 94 77 45 45 51 46 51 20 50 65 57

-5.906259,146.890778,61
-5.940275,146.950867,64
...

from numpy import *
data = open('1.txt', 'r').read()
arr = fromstring(' '.join(data.split()), sep = ' ')
arr.shape=(3, arr.shape[0] / 3)
fout = open('out.csv', 'w')
for k in range(len(arr[0])):
    fout.write(','.join(map(str, arr[:,k]))+'\n')
fout.close()

    groups = []
    group  = []
    for line in (x.strip() for x in file("file_name").readlines()) :
        if line :
            group.append(line)
        else :
            groups.append(" ".join(group).split())
            group[:] = []

    with file("file_name.csv", "wb") as out
        for group in zip(*groups) :
            out.write(", ".join(group) + "\n")

data = open('input_file.txt', 'r').read().split()
k = len(data)/3
fout = open('out_file.csv', 'w')
[fout.write(','.join((data[t], data[t+k], data[t+2*k]))+ '\n') for t in range(k)]
fout.close()