Bump minimum Python version to 3.8 (#1876)

* Bump minimum Python version to 3.8

* typing_extensions.Literal -> typing.Literal

* ns-dev-test

* typing_extensions.get_args => typing.get_args

* Format with older version of black

* Bump `black`

* Run black

nerfstudio/process_data/colmap_converter_to_nerfstudio_dataset.py

@@ -16,10 +16,9 @@
 
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Dict, List, Optional, Tuple
+from typing import Dict, List, Literal, Optional, Tuple
 
 from rich.console import Console
-from typing_extensions import Literal
 
 from nerfstudio.process_data import colmap_utils, hloc_utils, process_data_utils
 from nerfstudio.process_data.base_converter_to_nerfstudio_dataset import (
@@ -182,7 +181,11 @@ class ColmapConverterToNerfstudioDataset(BaseConverterToNerfstudioDataset):
         """
         self.absolute_colmap_path.mkdir(parents=True, exist_ok=True)
 
-        (sfm_tool, feature_type, matcher_type,) = process_data_utils.find_tool_feature_matcher_combination(
+        (
+            sfm_tool,
+            feature_type,
+            matcher_type,
+        ) = process_data_utils.find_tool_feature_matcher_combination(
             self.sfm_tool, self.feature_type, self.matcher_type
         )
         # check that sfm_tool is hloc if using refine_pixsfm

nerfstudio/process_data/colmap_utils.py

@@ -18,7 +18,7 @@ Tools supporting the execution of COLMAP and preparation of COLMAP-based dataset
 
 import json
 from pathlib import Path
-from typing import Any, Dict, Optional
+from typing import Any, Dict, Literal, Optional
 
 import appdirs
 import cv2
@@ -27,7 +27,6 @@ import requests
 import torch
 from rich.console import Console
 from rich.progress import track
-from typing_extensions import Literal
 
 # TODO(1480) use pycolmap instead of colmap_parsing_utils
 # import pycolmap
@@ -115,9 +114,7 @@ def run_colmap(
     colmap_version = get_colmap_version(colmap_cmd)
 
     colmap_database_path = colmap_dir / "database.db"
-    if colmap_database_path.exists():
-        # Can't use missing_ok argument because of Python 3.7 compatibility.
-        colmap_database_path.unlink()
+    colmap_database_path.unlink(missing_ok=True)
 
     # Feature extraction
     feature_extractor_cmd = [

nerfstudio/process_data/hloc_utils.py

@@ -21,9 +21,9 @@ Requires hloc module from : https://github.com/cvg/Hierarchical-Localization
 
 import sys
 from pathlib import Path
+from typing import Literal
 
 from rich.console import Console
-from typing_extensions import Literal
 
 from nerfstudio.process_data.process_data_utils import CameraModel
 

nerfstudio/process_data/process_data_utils.py

@@ -20,12 +20,11 @@ import shutil
 import sys
 from enum import Enum
 from pathlib import Path
-from typing import List, Optional, Tuple
+from typing import List, Literal, Optional, OrderedDict, Tuple
 
 import cv2
 import numpy as np
 from rich.console import Console
-from typing_extensions import Literal, OrderedDict
 
 from nerfstudio.utils.rich_utils import status
 from nerfstudio.utils.scripts import run_command