fix prop typing generation

Author: T4rk1n

@plotly/dash-generator-test-component-typescript/src/props.ts

@@ -25,6 +25,7 @@ export type TypescriptComponentProps = {
     array_obj?: {a: string}[];
     array_any?: any[];
     enum_string?: 'one' | 'two';
+    enum_number?: 2 | 3 | 4 | 5 | 6;
     union?: number | string;
     union_shape?: {a: string} | string;
     array_union_shape?: ({a: string} | string)[];

dash/development/_py_prop_typing.py

@@ -103,18 +103,17 @@ def _get_literal_value(value):
     if value is None:
         return "None"
 
+    if isinstance(value, str):
+        value = json.loads(value.replace("'", '"'))
+
     if isinstance(value, bool):
         return str(value)
 
     return json.dumps(value)
 
 
 def generate_enum(type_info, *_):
-    values = [
-        _get_literal_value(json.loads(v["value"].replace("'", '"')))
-        for v in type_info["value"]
-        if v
-    ]
+    values = [_get_literal_value(v["value"]) for v in type_info["value"] if v]
     return f"Literal[{', '.join(values)}]"