fix type dependency

sleap/util.py

@@ -1,8 +1,10 @@
-"""A miscellaneous set of utility functions. 
+"""A miscellaneous set of utility functions.
 
 Try not to put things in here unless they really have no other place.
 """
 
+from __future__ import annotations
+
 import base64
 import json
 import os
@@ -11,31 +13,34 @@
 from collections import defaultdict
 from io import BytesIO
 from pathlib import Path
-from typing import Any, Dict, Hashable, Iterable, List, Optional
+from typing import TYPE_CHECKING, Any, Dict, Hashable, Iterable, List, Optional
 from urllib.parse import unquote, urlparse
 from urllib.request import url2pathname
-import rich.progress
+
+try:
+    from importlib.resources import files  # New in 3.9+
+except ImportError:
+    from importlib_resources import files  # TODO(LM): Upgrade to importlib.resources.
 
 import attr
 import h5py as h5
 import numpy as np
 import psutil
 import rapidjson
+import rich.progress
 import yaml
-
-try:
-    from importlib.resources import files  # New in 3.9+
-except ImportError:
-    from importlib_resources import files  # TODO(LM): Upgrade to importlib.resources.
 from PIL import Image
 
 import sleap.version as sleap_version
 
+if TYPE_CHECKING:
+    from rich.progress import Task
+
 
 class RateColumn(rich.progress.ProgressColumn):
     """Renders the progress rate."""
 
-    def render(self, task: "Task") -> rich.progress.Text:
+    def render(self, task: Task) -> rich.progress.Text:
         """Show progress rate."""
         speed = task.speed
         if speed is None: