Add random M104 codes to a gcode for a 3D print in wood PLA to make stripes (old script, may be better out there)

wooden_gcode_wobble.py

# Randomize layer temperatures for wood PLA.

import argparse
import re
import random
import os


gcode_folder = '../../3DPrints/gcodes/'
filename = 'scrabble_hold_10v3.gcode'
assert os.path.splitext(filename)[1] == '.gcode'
tmin:int=190
tmax:int=220
Zpattern = re.compile("^[^;]*(G(0|1)).*Z.*$")
Tpattern = re.compile("^[^;]*(M104|M109).*")

# ---------
layerchange = False

with open(os.path.join(gcode_folder, filename), 'r') as fh:
    lines = fh.read().splitlines()

fh = open(os.path.join(gcode_folder, filename.replace('.gcode', f'.wooble{tmin}-{tmax}.gcode')), 'w')

for line in lines:
    if layerchange == True:
        layerchange = False
        if not Tpattern.match(line):
            fh.write(f"M104 S{random.randint(tmin, tmax)}\n")
    if layerchange == False and Zpattern.match( line ):
        layerchange = True
    fh.write(f"{line}\n")

fh.close()

# -------------
layerchange = False

with open(os.path.join(gcode_folder, filename), 'r') as fh:
    lines = fh.read().splitlines()

fh = open(os.path.join(gcode_folder, filename.replace('.gcode', f'.wobble{tmin}-{tmax}.v2.gcode')), 'w')

tally = 0
for line in lines:
    if layerchange == True or tally == 200:
        layerchange = False
        tally = 0
        if not Tpattern.match(line):
            fh.write(f"M104 S{random.randint(tmin, tmax)}\n")
    if layerchange == False and Zpattern.match( line ):
        layerchange = True
    tally += 1
    fh.write(f"{line}\n")

fh.close()