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"cells": [
{
"cell_type": "markdown",
"id": "91bd5e5c",
"metadata": {},
"source": [
"# KNPS 2026 λΆλ²μμ€λ¬Ό λ³ννμ§ λ² μ΄μ€λΌμΈ μ μΆ (UNet-ResNet18, 6μ±λ)\n",
"\n",
"κ°μ μμΉμ μ (pre)/ν(post) μμ± RGB ν¨μΉ(256x256) ν μμμ **μ¦μΆ(new_building)** κ³Ό\n",
"**λ²λͺ©(tree_removal)** μμμ κ°κ° ν΄λ¦¬κ³€ λͺ©λ‘μΌλ‘ μΆλ ₯νλ μ°Έκ³ κ΅¬νμ
λλ€. μ±λ₯ κΈ°μ€μ μ΄ μλλΌ\n",
"**μ
λ ₯μμ μ μΆ νμΌκΉμ§μ νλ¦κ³Ό μ μΆ κ·κ²©μ νμΈνλ μ΅μ λμ μμ**μ΄λ©°, μ¬μ© μ무λ μμ΅λλ€.\n",
"\n",
"- μ
λ ₯: `AIF_INPUT_DIR` μλ `pairs.csv`(`id` μ΄)μ `images/<id>/pre.png`, `images/<id>/post.png`\n",
" (κ° 256x256 RGB 8bit, λ μμμ κ°μ 격μμ μ λ ¬λμ΄ μμ΅λλ€)\n",
"- μΆλ ₯: `AIF_PREDICTION_PATH`μ `id,new_building,tree_removal` CSV ν κ°. λ μ΄μ κ°κ° κ·Έ ν΄λμ€μ λ³ν\n",
" ν΄λ¦¬κ³€ λͺ©λ‘μ μ μ JSON λ¬Έμμ΄μ
λλ€. ν΄λ¦¬κ³€μ `[x, y]` μ μ λͺ©λ‘(κ΅¬λ© μμ)μ΄κ³ λͺ©λ‘ μμ ν΄λ¦¬κ³€μ μ¬λ¬ κ°\n",
" λ΄μ μ μμ΅λλ€. μ: `[[[10,10],[30,10],[30,30],[10,30]]]`. μ’νλ ν μμ ν¨μΉμ ν½μ
μ’ν(μμ μΌμͺ½ μ\n",
" λͺ¨μ리, x μ€λ₯Έμͺ½, y μλ, μ€μ νμ©)μ΄κ³ λΉ λ¬Έμμ΄μ κ·Έ ν΄λμ€μ λ³νκ° μμμ λ»ν©λλ€. CSV μ
μμ JSON μ\n",
" `csv` λͺ¨λμ΄ μΈμ© μ²λ¦¬λ₯Ό ν΄ μ€λλ€\n",
"- λλ΄ κ°μ€μΉ: `assets/model/unet_r18_cd.pt` (55MB). μΆλ‘ λ¨κ³λ λ€νΈμν¬κ° μ°¨λ¨λλ―λ‘ νμν\n",
" νμΌμ λͺ¨λ zip μμ λ£μ΄μΌ ν©λλ€\n",
"- μμ‘΄μ±: `requirements.txt`λ‘ μ μΈν©λλ€(ν΄λ¦¬κ³€ λ³νμ shapely λ₯Ό μλλ€). μ±μ μλ²κ° μ€μΉ λ¨κ³μμ λ¨Όμ μ€μΉνλ―λ‘ λ
ΈνΈλΆ μμ\n",
" μ€μΉ μ
μ λμ§ μμμ΅λλ€. `%pip install -r requirements.txt`μ²λΌ μλκ²½λ‘λ‘ νμΌμ κ°λ¦¬ν€λ\n",
" μ€μΉ μ€μ μ€μΉ λ¨κ³μ μμ
ν΄λκ° μ μΆλ¬Ό ν΄λκ° μλμ΄μ μ€ν¨νλ―λ‘ λ£μ§ λ§μκΈ° λ°λλλ€\n",
"- μ μΆ κ·μΉ: zip μ΅μμμ `predict.ipynb`(μ΄ νμΌ)μ `requirements.txt`, κ°μ€μΉλ `assets/`μ λλ΄\n",
"\n",
"**λ‘컬 μ€ν**: `pairs.csv`μ `images/<id>/{pre,post}.png`λ₯Ό λ΄μ ν΄λλ₯Ό λ§λ€κ³ νκ²½λ³μλ‘ λκΈ°λ©΄ λ©λλ€.\n",
"μ§μ νμ§ μμΌλ©΄ `./input`μ μ½κ³ `./prediction.csv`μ μλλ€.\n",
"```\n",
"AIF_INPUT_DIR=<μ
λ ₯ ν΄λ> AIF_PREDICTION_PATH=./prediction.csv jupyter nbconvert --to notebook --execute predict.ipynb\n",
"```\n",
"\n",
"**λΌμ΄μ μ€**: segmentation_models_pytorch MIT, ResNet18 ImageNet μΈμ½λ(torchvision μλ³Έ) BSD-3,\n",
"νμΈνλ κ°μ€μΉμ μ΄ μ½λλ λν μ°Έκ° λͺ©μ μΌλ‘ μμ λ‘κ² μ¬μ©, μμ , μ¬νμ΅νμ€ μ μμ΅λλ€.\n",
"νμ μ μΆλ¬Όμ μΉ΄νΌλ ννΈλ λ³λ μ½κ΄μ΄ μ νλμ§ μμ΅λλ€. μΆμ²λ `NOTICE`, μλ¬Έμ `LICENSE`μ\n",
"μμ΅λλ€. μ΄ λ² μ΄μ€λΌμΈμ μ°Έκ³ κ΅¬νμ΄λ©° μ¬μ© μλ¬΄κ° μμ΅λλ€."
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "d5f3a0ff",
"metadata": {},
"outputs": [],
"source": "# [setup]\nimport csv\nimport io\nimport json\nimport os\nimport sys\nimport time\nfrom pathlib import Path\n\nimport numpy as np\nimport torch\nfrom PIL import Image\nfrom shapely.geometry import MultiPolygon, Polygon, box\nfrom shapely.ops import unary_union\n\nINPUT_DIR = Path(os.environ.get(\"AIF_INPUT_DIR\", \"./input\"))\nPREDICTION_PATH = Path(os.environ.get(\"AIF_PREDICTION_PATH\", \"./prediction.csv\"))\nCKPT = next(p for p in map(Path, [\"assets/model/unet_synth.pt\", \"assets/model/siam_v2.pt\", \"assets/model/hybrid_v3.pt\"]) if p.exists()) # 컀λμ μμ
ν΄λκ° μ μΆλ¬Ό 루νΈμ΄λ―λ‘ μλκ²½λ‘λ‘ μ§μ ν©λλ€\n\nH, W = 256, 256\nBATCH = 16\nCLASSES = (\"new_building\", \"tree_removal\") # λͺ¨λΈ μΆλ ₯ μ±λ 1, 2 (0 μ λ°°κ²½)\nMIN_AREA = {'new_building': 30.0, 'tree_removal': 30.0} # μ΄ λ©΄μ (px^2) λ―Έλ§μ μ‘°κ°μ μ§μλλ€ (νμ΅ λμ κ°μ νμ²λ¦¬)\nMIN_POS_AREA = 20.0 # μ‘°κ°μ μ§μ΄ λ€ λ¨μ μ΄λ©΄μ μ΄ μ΄ κ° λ―Έλ§μ΄λ©΄ λΉ μμΈ‘μΌλ‘ λ
λλ€ (μ±μ κ·μΉκ³Ό λμΌ)\nSIMPLIFY_PX = 0.5 # κ³λ¨ν μΈκ³½μ μ μ΄ νμ© μ€μ°¨λ‘ λ¨μνν©λλ€ (μμ 보쑴). μ±μ νμ© μ€μ°¨ 1px μμ
λλ€\nNDIGITS = 2 # μ’ν μμ μλ¦Ώμ\nMEAN = np.array([0.485, 0.456, 0.406], np.float32)\nSTD = np.array([0.229, 0.224, 0.225], np.float32)\n\n\ndef mask_to_polygons(mask: np.ndarray, min_area: float) -> str:\n \"\"\"(H,W) μ΄μ§ λ§μ€ν¬ -> ν΄λ¦¬κ³€ λͺ©λ‘ JSON λ¬Έμμ΄(ν΄λ¦¬κ³€ = μ λͺ©λ‘, κ΅¬λ© μμ). λ³νκ° μμΌλ©΄ λΉ λ¬Έμμ΄.\n\n ν λ¨μ λ°(run)μ νμ κ²½κ³ μ¬κ°νμΌλ‘ λ§λ€μ΄ ν©μ§ν©νλ©΄ λ§μ€ν¬μ μΈκ³½μ μ κ·Έλλ‘ λ°λ₯΄λ ν΄λ¦¬κ³€μ΄ λμ΅λλ€.\n μ’νλ νμ λͺ¨μ리 κΈ°μ€(νμ (r, c) λ [c, c+1] x [r, r+1])μ΄λΌ μ±μ κ·μ½κ³Ό κ°μ΅λλ€.\n \"\"\"\n m = np.asarray(mask, dtype=bool)\n boxes = []\n for r in np.flatnonzero(m.any(axis=1)):\n pad = np.concatenate(([0], m[r].astype(np.int8), [0]))\n edges = np.flatnonzero(np.diff(pad))\n for s, e in zip(edges[::2], edges[1::2]):\n boxes.append(box(float(s), float(r), float(e), float(r + 1)))\n if not boxes:\n return \"\"\n g = unary_union(boxes)\n parts = list(g.geoms) if isinstance(g, MultiPolygon) else [g]\n parts = [p for p in parts if isinstance(p, Polygon) and p.area >= min_area] # μμ μ‘°κ° μ κ±°\n if not parts or sum(p.area for p in parts) < MIN_POS_AREA:\n return \"\"\n out = []\n for p in parts:\n p = p.simplify(SIMPLIFY_PX, preserve_topology=True)\n if p.is_empty or p.area <= 0:\n continue\n # λ°κΉ₯ κ²½κ³λ§ μλλ€(μ μΆ νμμ ꡬλ©μ΄ μμ΅λλ€). λ§μ§λ§ μ μ 첫 μ κ³Ό κ°μΌλ―λ‘ λΊλλ€\n out.append([[round(float(x), NDIGITS), round(float(y), NDIGITS)] for x, y in list(p.exterior.coords)[:-1]])\n return json.dumps(out, separators=(\",\", \":\")) if out else \"\"\n\nTHRESH = {'new_building': 0.5, 'tree_removal': 0.5} # pixel probability thresholds\nPRES_THRESH = 0.0 # presence-head gate (siam only, 0 = off)\n"
},
{
"cell_type": "code",
"execution_count": null,
"id": "938bc30a",
"metadata": {},
"outputs": [],
"source": [
"# [inputs]\n",
"# λͺ©λ‘ νμΌμ μ¬κ· νμμΌλ‘ μ°Ύκ³ κ·Έ λΆλͺ¨ ν΄λλ₯Ό μ
λ ₯ 루νΈλ‘ μΌμ΅λλ€ (κ»λ°κΈ° ν΄λ ν κ²Ήμ λλΉ).\n",
"# μΆλ‘ λμμ λͺ©λ‘ νμΌμ΄ μ λ³Έμ΄λ©° images/ ν΄λλ₯Ό νμ΄ λμμ μ νμ§ μμ΅λλ€.\n",
"print(\"AIF_INPUT_DIR:\", INPUT_DIR, sorted(p.name for p in INPUT_DIR.iterdir()) if INPUT_DIR.is_dir() else \"(μμ)\")\n",
"lists = sorted(INPUT_DIR.rglob(\"pairs.csv\"))\n",
"if not lists:\n",
" # μ
λ ₯μ΄ νλ¦° ν΄λκ° μλλΌ μμΆλ³Έ κ·Έλλ‘ μ£Όμ΄μ§λ κ²½μ°μ λλΉν©λλ€\n",
" zs = sorted(INPUT_DIR.rglob(\"*.zip\")) if INPUT_DIR.is_dir() else []\n",
" if len(zs) == 1:\n",
" import tempfile, zipfile\n",
" dst = Path(tempfile.mkdtemp()) / \"input\"\n",
" with zipfile.ZipFile(zs[0]) as z:\n",
" z.extractall(dst)\n",
" print(f\"μ
λ ₯μ΄ μμΆλ³Έμ΄μ΄μ νμ΄μ μ½μ΅λλ€: {zs[0].name} -> {dst}\")\n",
" lists = sorted(dst.rglob(\"pairs.csv\"))\n",
"if not lists:\n",
" raise SystemExit(f\"pairs.csv λ₯Ό μ°Ύμ§ λͺ»νμ΅λλ€: {INPUT_DIR}\")\n",
"ROOT = lists[0].parent\n",
"with lists[0].open(encoding=\"utf-8-sig\", newline=\"\") as f:\n",
" IDS = [row[\"id\"].strip() for row in csv.DictReader(f) if row.get(\"id\", \"\").strip()]\n",
"print(f\"μ
λ ₯ λ£¨νΈ {ROOT}, μ {len(IDS)}건\")"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "9ab4f29d",
"metadata": {},
"outputs": [],
"source": [
"# [env]\n",
"print(\"python\", sys.version.split()[0], \"torch\", torch.__version__)\n",
"print(\"cuda\", torch.cuda.is_available(), \"mps\", getattr(torch.backends, \"mps\", None) is not None and torch.backends.mps.is_available())"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "400e6923",
"metadata": {},
"outputs": [],
"source": [
"# [model]\n",
"sys.path.insert(0, \"assets\")\n",
"import segmentation_models_pytorch as smp\n",
"from model_v2 import SiamCD\n",
"ENS_W = 0.5 # weight of the baseline-arch UNet; 1-ENS_W for the Siamese model\n",
"\n",
"\n",
"def load_model(device: str):\n",
" u = smp.Unet(encoder_name=\"resnet18\", encoder_weights=None, in_channels=6, classes=3)\n",
" u.load_state_dict(torch.load(\"assets/model/unet_synth.pt\", map_location=\"cpu\", weights_only=True)[\"state_dict\"])\n",
" import glob\n",
" sm = []\n",
" for f in sorted(glob.glob(\"assets/model/siam_*.pt\")): # several Satlas Siamese models -> output average\n",
" s = SiamCD()\n",
" s.load_state_dict(torch.load(f, map_location=\"cpu\", weights_only=True)[\"state_dict\"])\n",
" sm.append(s.to(device).eval()); print(\"loaded\", f, flush=True)\n",
" return (u.to(device).eval(), sm)\n",
"\n",
"\n",
"def read_image(path: Path) -> np.ndarray:\n",
" with Image.open(io.BytesIO(path.read_bytes())) as im:\n",
" arr = np.asarray(im.convert(\"RGB\"))\n",
" if arr.shape[:2] != (H, W):\n",
" raise ValueError(f\"{path}: ν¬κΈ° {arr.shape[:2]} κ° {(H, W)} μ λ€λ¦
λλ€\")\n",
" return arr\n",
"\n",
"\n",
"@torch.no_grad()\n",
"def predict_batch(model, pres, posts, device):\n",
" u, s = model\n",
" a = torch.from_numpy(np.stack(pres)).permute(0, 3, 1, 2).to(device).float() / 255\n",
" b = torch.from_numpy(np.stack(posts)).permute(0, 3, 1, 2).to(device).float() / 255\n",
" m = torch.tensor(MEAN, device=device).view(1, 3, 1, 1); sd = torch.tensor(STD, device=device).view(1, 3, 1, 1)\n",
" prob, pp = 0, 0\n",
" for dims in ([], [3], [2], [2, 3]):\n",
" ai, bi = (torch.flip(a, dims), torch.flip(b, dims)) if dims else (a, b)\n",
" pu = torch.softmax(u(torch.cat([(ai - m) / sd, (bi - m) / sd], 1)), 1)[:, 1:3]\n",
" cs, ps = 0, 0\n",
" for sk in s:\n",
" with torch.autocast(\"cuda\", dtype=torch.float16, enabled=(device == \"cuda\")):\n",
" ch, pr, _, _ = sk(ai, bi)\n",
" cs = cs + ch.float().sigmoid() / len(s); ps = ps + pr.float().sigmoid() / len(s)\n",
" ci = ENS_W * pu.float() + (1 - ENS_W) * cs\n",
" prob = prob + (torch.flip(ci, dims) if dims else ci) / 4\n",
" pp = pp + ps / 4\n",
" return prob.cpu().numpy(), pp.cpu().numpy()\n",
"\n",
"\n",
"DEVICE = \"cuda\" if torch.cuda.is_available() else (\"mps\" if torch.backends.mps.is_available() else \"cpu\")\n",
"try:\n",
" MODEL = load_model(DEVICE)\n",
" predict_batch(MODEL, [np.zeros((H, W, 3), np.uint8)], [np.zeros((H, W, 3), np.uint8)], DEVICE)\n",
"except Exception as e: # noqa: BLE001\n",
" print(f\"{DEVICE} μν μΆλ‘ μ μ€ν¨ν΄({type(e).__name__}: {e}) CPU λ‘ μ νν©λλ€\")\n",
" DEVICE = \"cpu\"\n",
" MODEL = load_model(DEVICE)\n",
"print(\"device\", DEVICE)\n",
"\n",
"\n",
"# ---- CHMv2 canopy height (DINOv3 ViT-L/16 SAT-493M + DPT head, DINOv3 License: assets/chmv2/LICENSE_DINOv3.md)\n",
"CHM_A = 0.2 # weight of the canopy-height cue in the tree_removal probability\n",
"try:\n",
" import transformers\n",
" print(\"python\", sys.version.split()[0], \"transformers\", transformers.__version__, flush=True)\n",
" from chm_fuse import CHM, cue_abs, cue_diff\n",
" CHM_CUE = cue_diff\n",
" CHM_MODEL = CHM(\"assets/chmv2\", DEVICE, scale=1.5)\n",
" CHM_MODEL.heights([np.zeros((H, W, 3), np.uint8)])\n",
" print(\"CHM loaded\", CHM_A, \"diff\", 1.5, flush=True)\n",
"except Exception as e: # noqa: BLE001\n",
" print(f\"CHM load failed ({type(e).__name__}: {e}); CHM cue off\", flush=True)\n",
" CHM_A = 0.0\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "a918ddd1",
"metadata": {},
"outputs": [],
"source": [
"# [infer]\n",
"ROWS = []\n",
"STATS = {c: {\"maxp\": [], \"pres\": []} for c in CLASSES}\n",
"GRID_T = (0.3, 0.4, 0.5, 0.6, 0.7, 0.8)\n",
"GRID_A = (20, 50, 100, 200)\n",
"GRID = {c: np.zeros((len(GRID_T), len(GRID_A)), int) for c in CLASSES}\n",
"t0 = time.time()\n",
"for s in range(0, len(IDS), BATCH):\n",
" ids = IDS[s:s + BATCH]\n",
" pres = [read_image(ROOT / \"images\" / i / \"pre.png\") for i in ids]\n",
" posts = [read_image(ROOT / \"images\" / i / \"post.png\") for i in ids]\n",
" prob, pp = predict_batch(MODEL, pres, posts, DEVICE)\n",
" if CHM_A > 0:\n",
" cue = CHM_CUE(CHM_MODEL.heights(pres), CHM_MODEL.heights(posts)).cpu().numpy()\n",
" prob[:, 1] = (1 - CHM_A) * prob[:, 1] + CHM_A * cue\n",
" STATS.setdefault(\"cue_max\", []).extend(cue.reshape(len(ids), -1).max(1).tolist())\n",
" nd = np.stack([(a.max(2) == 0) | (b.max(2) == 0) for a, b in zip(pres, posts)]) # no-data is never scored\n",
" prob[:, :, :, :][np.repeat(nd[:, None], 2, 1)] = 0\n",
" for j, i in enumerate(ids):\n",
" cells = []\n",
" for k, c in enumerate(CLASSES):\n",
" p = prob[j, k]\n",
" STATS[c][\"maxp\"].append(float(p.max()))\n",
" if pp is not None:\n",
" STATS[c][\"pres\"].append(float(pp[j, k]))\n",
" for ti, t in enumerate(GRID_T):\n",
" area = int((p > t).sum())\n",
" for ai, amin in enumerate(GRID_A):\n",
" GRID[c][ti, ai] += area >= amin\n",
" gate = pp is None or PRES_THRESH <= 0 or pp[j, k] >= PRES_THRESH\n",
" cells.append(mask_to_polygons(p > THRESH[c], MIN_AREA[c]) if gate else \"\")\n",
" ROWS.append((i, *cells))\n",
" if (s // BATCH) % 10 == 0 or s + BATCH >= len(IDS):\n",
" print(f\" {min(s + BATCH, len(IDS))}/{len(IDS)} {time.time() - t0:.1f}s\", flush=True)\n",
"n_b = sum(1 for _, b, _ in ROWS if b)\n",
"n_t = sum(1 for _, _, t in ROWS if t)\n",
"print(f\"μΆλ‘ μ μλ£νμ΅λλ€: {len(ROWS)}건, μ¦μΆ μμ± {n_b}건, λ²λͺ© μμ± {n_t}건, {time.time() - t0:.1f}s\")\n",
"print(\"μ€μ :\", \"THRESH\", THRESH, \"MIN_AREA\", MIN_AREA, \"PRES_THRESH\", PRES_THRESH)\n",
"for c in CLASSES:\n",
" mp = np.array(STATS[c][\"maxp\"])\n",
" print(f\"[{c}] μλ³ μ΅λνλ₯ λΆμμ(10/25/50/75/90%):\", np.round(np.percentile(mp, [10, 25, 50, 75, 90]), 3).tolist())\n",
" if STATS[c][\"pres\"]:\n",
" pr = np.array(STATS[c][\"pres\"])\n",
" print(f\"[{c}] μ‘΄μ¬νλ₯ λΆμμ(10/25/50/75/90%):\", np.round(np.percentile(pr, [10, 25, 50, 75, 90]), 3).tolist(),\n",
" \" >=0.3/0.5/0.7:\", [int((pr >= v).sum()) for v in (0.3, 0.5, 0.7)])\n",
" print(f\"[{c}] μμ± μ μ ν (ν=ν½μ
μκ³ {GRID_T}, μ΄=μ΅μλ©΄μ {GRID_A}):\")\n",
" for ti, t in enumerate(GRID_T):\n",
" print(\" \", t, GRID[c][ti].tolist())\n",
"\n",
"if STATS.get(\"cue_max\"):\n",
" print(\"CHM λ¨μ μλ³ μ΅λκ° λΆμμ(10/50/90%):\", np.round(np.percentile(STATS[\"cue_max\"], [10, 50, 90]), 3).tolist())\n"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "4bd390bc",
"metadata": {},
"outputs": [],
"source": [
"# [save]\n",
"PREDICTION_PATH.parent.mkdir(parents=True, exist_ok=True)\n",
"with PREDICTION_PATH.open(\"w\", newline=\"\", encoding=\"utf-8\") as f:\n",
" w = csv.writer(f)\n",
" w.writerow([\"id\", *CLASSES])\n",
" w.writerows(ROWS)\n",
"print(\"μ μ₯νμ΅λλ€:\", PREDICTION_PATH, PREDICTION_PATH.stat().st_size, \"bytes\")"
]
},
{
"cell_type": "markdown",
"id": "208f89da",
"metadata": {},
"source": [
"## μ μΆ\n",
"\n",
"μλ μ
μ `<μ°Έμ¬ν€>` μ리μ λ³ΈμΈμ μ°Έμ¬ν€λ₯Ό λ£κ³ μ€ννλ©΄ μ΄ λ
ΈνΈλΆμ΄ λ€μ΄ μλ ν΄λ μ 체κ°\n",
"μ μΆλ©λλ€. μ°Έμ¬ν€λ₯Ό λ
ΈνΈλΆμ μ μ μ±λ‘ 곡μ νμ§ λ§μκΈ° λ°λλλ€. μ°Έμ¬ν€λ λ§μ΄νμ΄μ§μμ\n",
"μλ κ²½λ‘λ₯Ό λ°λΌ μΈμ λ λ€μ νμΈνμ€ μ μμ΅λλ€.\n",
"\n",
"νλ‘ν β λ§μ΄νμ΄μ§ β νλνμ€ν 리 ν β μ°Έκ°νμ μ£Όμ μ ν€ λ³΅μ¬"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
}
},
"nbformat": 4,
"nbformat_minor": 5
} |