truncate_gcode.py

import re
import sys
filename = sys.argv[-1]
gcode = open(filename)
data = gcode.read()

def replace(match):
	match = match.group(2)
	#print match
	serious_zaok=str(round(float("0."+match),5))
	print match
	print "zaok",serious_zaok[2:7]
	return "."+serious_zaok[2:7]
	return "." + match[0:4]

  
pattern = re.compile(r"([.])([0-9]+)")

output = re.sub(pattern, replace, data)
output = re.sub(r'T0 M6',r'(TO M6) (gives error on grbl)',output)
new_filename = filename[:-3] + '-truncated.nc'
file = open(new_filename, "w")
file.write("(Modified by metric-gcode-truncator. Intended for use in absolute mode. Incremental mode may cause errors.)")
file.write(output)
file.close()
gcode.close()