Expose more types for better static typing options

dash/dependencies.py

@@ -1,3 +1,4 @@
+from enum import Enum
 from typing import Union, Sequence, Any
 
 from .development.base_component import Component
@@ -9,32 +10,33 @@
 ComponentIdType = Union[str, Component, dict]
 
 
-class _Wildcard:  # pylint: disable=too-few-public-methods
-    def __init__(self, name: str):
-        self._name = name
+class Wildcard(Enum):
+    MATCH = "MATCH"
+    ALL = "ALL"
+    ALLSMALLER = "ALLSMALLER"
 
     def __str__(self):
-        return self._name
+        return self.value
 
     def __repr__(self):
-        return f"<{self}>"
+        return f"<{self.value}>"
 
     def to_json(self) -> str:
         # used in serializing wildcards - arrays are not allowed as
         # id values, so make the wildcards look like length-1 arrays.
-        return f'["{self._name}"]'
+        return f'["{self.value}"]'
 
 
-MATCH = _Wildcard("MATCH")
-ALL = _Wildcard("ALL")
-ALLSMALLER = _Wildcard("ALLSMALLER")
+MATCH = Wildcard.MATCH
+ALL = Wildcard.ALL
+ALLSMALLER = Wildcard.ALLSMALLER
 
 
 class DashDependency:  # pylint: disable=too-few-public-methods
     component_id: ComponentIdType
     allow_duplicate: bool
     component_property: str
-    allowed_wildcards: Sequence[_Wildcard]
+    allowed_wildcards: Sequence[Wildcard]
     allow_optional: bool
 
     def __init__(self, component_id: ComponentIdType, component_property: str):
@@ -95,8 +97,8 @@ def _id_matches(self, other) -> bool:
                 other_v = other_id[k]
                 if v == other_v:
                     continue
-                v_wild = isinstance(v, _Wildcard)
-                other_wild = isinstance(other_v, _Wildcard)
+                v_wild = isinstance(v, Wildcard)
+                other_wild = isinstance(other_v, Wildcard)
                 if v_wild or other_wild:
                     if not (v_wild and other_wild):
                         continue  # one wild, one not
@@ -120,7 +122,7 @@ def has_wildcard(self) -> bool:
         """
         if isinstance(self.component_id, dict):
             for v in self.component_id.values():
-                if isinstance(v, _Wildcard):
+                if isinstance(v, Wildcard):
                     return True
         return False
 

dash/development/_py_components_generation.py

@@ -25,13 +25,10 @@
 from typing_extensions import TypedDict, NotRequired, Literal # noqa: F401
 from dash.development.base_component import Component, _explicitize_args
 {custom_imports}
+ComponentSingleType = typing.Union[str, int, float, Component, None]
 ComponentType = typing.Union[
-    str,
-    int,
-    float,
-    Component,
-    None,
-    typing.Sequence[typing.Union[str, int, float, Component, None]],
+    ComponentSingleType,
+    typing.Sequence[ComponentSingleType],
 ]
 
 NumberType = typing.Union[

dash/development/base_component.py

@@ -454,14 +454,11 @@ def _validate_deprecation(self):
             warnings.warn(DeprecationWarning(textwrap.dedent(deprecation_message)))
 
 
+ComponentSingleType = typing.Union[str, int, float, Component, None]
 # Renderable node type.
 ComponentType = typing.Union[
-    str,
-    int,
-    float,
-    Component,
-    None,
-    typing.Sequence[typing.Union[str, int, float, Component, None]],
+    ComponentSingleType,
+    typing.Sequence[ComponentSingleType],
 ]
 
 ComponentTemplate = typing.TypeVar("ComponentTemplate")