fix some type annotations for Python 3.7

examples/local_file_picker/local_file_picker.py

@@ -1,5 +1,5 @@
 from pathlib import Path
-from typing import Optional
+from typing import Dict, Optional
 
 from nicegui import ui
 
@@ -58,7 +58,7 @@ class local_file_picker(ui.dialog):
             })
         self.grid.update()
 
-    async def handle_double_click(self, msg: dict) -> None:
+    async def handle_double_click(self, msg: Dict) -> None:
         self.path = Path(msg['args']['data']['path'])
         if self.path.is_dir():
             self.update_grid()

fetch_tailwind.py

@@ -2,6 +2,7 @@
 import re
 from dataclasses import dataclass, field
 from pathlib import Path
+from typing import List
 
 import requests
 from bs4 import BeautifulSoup
@@ -12,8 +13,8 @@ from secure import SecurePath
 class Property:
     title: str
     description: str
-    members: list[str]
-    short_members: list[str] = field(init=False)
+    members: List[str]
+    short_members: List[str] = field(init=False)
     common_prefix: str = field(init=False)
 
     def __post_init__(self) -> None:
@@ -48,7 +49,7 @@ class Property:
         return '_'.join(word.lower() for word in re.sub(r'[-/ &]', ' ', self.title).split())
 
 
-properties: list[Property] = []
+properties: List[Property] = []
 
 
 def get_soup(url: str) -> BeautifulSoup:

nicegui/events.py

@@ -1,6 +1,6 @@
 from dataclasses import dataclass
 from inspect import signature
-from typing import TYPE_CHECKING, Any, BinaryIO, Callable, List, Optional, Union
+from typing import TYPE_CHECKING, Any, BinaryIO, Callable, Dict, List, Optional, Union
 
 from . import background_tasks, globals
 from .helpers import KWONLY_SLOTS, is_coroutine
@@ -269,7 +269,7 @@ class KeyEventArguments(EventArguments):
 
 
 def handle_event(handler: Optional[Callable],
-                 arguments: Union[EventArguments, dict], *,
+                 arguments: Union[EventArguments, Dict], *,
                  sender: Optional['Element'] = None) -> None:
     try:
         if handler is None:

website/more_documentation/table_documentation.py

@@ -1,3 +1,5 @@
+from typing import Dict
+
 from nicegui import ui
 
 from ..documentation_tools import text_demo
@@ -75,7 +77,7 @@ def more() -> None:
         visible_columns = {column['name'] for column in columns}
         table = ui.table(columns=columns, rows=rows, row_key='name')
 
-        def toggle(column: dict, visible: bool) -> None:
+        def toggle(column: Dict, visible: bool) -> None:
             if visible:
                 visible_columns.add(column['name'])
             else: