Little example that parses gcode to pull out tool changes. This information can be used to manually weld filament together for multi-color prints without an AMS

gcode_tool_parser.py

from collections import defaultdict

def parse_gcode(path):
    usage = defaultdict(float)
    curr_t = None
    prev_e = 0.0

    with open(path) as f:
        for line in f:
            if line.startswith('T') and line[1].isdigit():
                curr_t = line.strip().split()[0]
            elif 'G1' in line and 'E' in line:
                parts = line.split()
                for p in parts:
                    if p.startswith('E'):
                        e = float(p[1:])
                        if curr_t is not None:
                            usage[curr_t] += max(0, e - prev_e)
                        prev_e = e
                        break
    return usage