extract the cura settings from a gcode file

extract.py

import json
import ast
from codecs import encode, decode

with open("CFFFP_Drawer_ThinHandle_TOLERANT.gcode", "r", encoding="utf-8") as f:
    settings_lines = [
        line.strip()[11:] for line in f.readlines() if line.startswith(";SETTING_3 ")
    ]
data = json.loads("".join(settings_lines))

for k, v in data.items():
    print("\n;----------------------------------------\n; " + k + "\n")

    if not isinstance(v, list):
        v = [v]

    for vv in v:
        config = decode(encode(vv, "latin-1", "backslashreplace"), "unicode-escape")
        print(";--\n")
        print(config)

info.md

Cura embeds the settings used to generate a gcode file in comments in the bottom of the file. For some reason, they are in a funny format though - a comment, with a prefix, containing a hard-wrapped JSON object with a few properties, each of which is a double-escaped string!

This is a small script to strip the comments back out and do the various concatenations and decodings to show you what the settings were.

M82 ;absolute extrusion mode
M104 S0
;End of Gcode
;SETTING_3 {"global_quality": "[general]\\nversion = 4\\nname = Draft #2\\ndefin
;SETTING_3 ition = custom\\n\\n[metadata]\\ntype = quality_changes\\nquality_typ
;SETTING_3 e = draft\\nsetting_version = 17\\n\\n[values]\\nadhesion_type = skir
;SETTING_3 t\\nadhesion_z_offset = 0\\nadhesion_z_offset_extensive_processing =