the beginning

Pipfile

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+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+click = "*"
+pudb = "*"
+
+[dev-packages]
+
+[requires]
+python_version = "3.9"

Pipfile.lock

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+{
+    "_meta": {
+        "hash": {
+            "sha256": "e9f54d81978ae2edab8cc80ea40118ed24f519a6e62f68a7fcdfa94083086e5a"
+        },
+        "pipfile-spec": 6,
+        "requires": {
+            "python_version": "3.9"
+        },
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "click": {
+            "hashes": [
+                "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a",
+                "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"
+            ],
+            "index": "pypi",
+            "version": "==7.1.2"
+        },
+        "pudb": {
+            "hashes": [
+                "sha256:e8f0ea01b134d802872184b05bffc82af29a1eb2f9374a277434b932d68f58dc"
+            ],
+            "index": "pypi",
+            "version": "==2019.2"
+        },
+        "pygments": {
+            "hashes": [
+                "sha256:ccf3acacf3782cbed4a989426012f1c535c9a90d3a7fc3f16d231b9372d2b716",
+                "sha256:f275b6c0909e5dafd2d6269a656aa90fa58ebf4a74f8fcf9053195d226b24a08"
+            ],
+            "markers": "python_version >= '3.5'",
+            "version": "==2.7.3"
+        },
+        "urwid": {
+            "hashes": [
+                "sha256:588bee9c1cb208d0906a9f73c613d2bd32c3ed3702012f51efe318a3f2127eae"
+            ],
+            "version": "==2.1.2"
+        }
+    },
+    "develop": {}
+}

gce.py

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+#!/usr/bin/env python3
+
+# usage gce mirror --axis x translate --y -200 file.gcode
+# usage gce
+arg_mirror_axis = 'y'
+arg_translation=[200, 0, 0]
+arg_file_path='file.gcode'
+
+
+from os import remove, rename
+from re import sub, findall, match, IGNORECASE
+# import click
+
+
+# modify_instructions = 'G0, G1, G2, G3, G90, G91, S, F, M3, M4'.split(', ')
+modify_instructions = '(G(0|1|2|3|90|91)|S|F|M(3|4))'
+temp_file_path = '.file.gcode.tmp'
+out_file_path = 'file_modified.gcode'
+
+# @click.command()
+# @click.option('--axis', default='x', help='mirror axis')
+# @click.argument('mirror')
+def mirror(instruction, axis='Y'):
+    return instruction.replace(axis, f'{axis}-')
+
+
+def translate(instruction, translation=[0, 0, 0]):
+    pattern = 'X[-0-9.]+'
+    x = findall(pattern, instruction, IGNORECASE)
+    if not x:
+        return instruction
+    try:
+        x = float(x[0][1:])
+    except ValueError:
+        return instruction
+    x = round(x + translation[0], 3)
+    return sub(pattern, f'X{x}', instruction, IGNORECASE)
+
+
+with open(arg_file_path, 'r') as gcode:
+
+    try:
+        remove(temp_file_path)
+    except IOError:
+        pass
+
+    with open(temp_file_path, 'w') as tmp_gcode:
+
+        instructions = gcode.readlines()
+        instructions_length = len(instructions)
+        instructions_count = 0
+        for instruction in instructions:
+
+            instructions_count += 1
+            print(f'\rparsing instruction {instructions_count}/{instructions_length})',
+                  end='')
+            instruction = instruction.strip()
+            if match(modify_instructions, instruction, IGNORECASE):
+#             if any(map(instruction.__contains__, modify_instructions)):
+
+#                 import pudb; pudb.set_trace()
+                instruction = mirror(instruction, axis=arg_mirror_axis)
+                instruction = translate(instruction, translation=arg_translation)
+            tmp_gcode.write(f'{instruction}\n')
+
+rename(temp_file_path, out_file_path)