import os
import sys
os.chdir('E:/')
polyline_file = open('Copy of LIDAR KOLONIA_REDUCED_5m.txt','r')
lines=polyline_file.readlines()
polyline_file.close()

B=open('lidar_data_5m.txt','w')
for line in lines[0:]:
       field=line.split(' ')
       x=float(field[0])
       y=float(field[1])
       z=float(field[2])
       s='%f,%f,%f\n' %(x,y,z)
       B.write(s)
B.close()