Add clear_params function

Author: edtechre

src/pybroker/__init__.py

@@ -70,6 +70,7 @@
     disable_progress_bar as disable_progress_bar,
     enable_progress_bar as enable_progress_bar,
     param as param,
+    clear_params as clear_params,
     register_columns as register_columns,
     unregister_columns as unregister_columns,
 )

src/pybroker/scope.py

@@ -177,6 +177,10 @@ def param(
         self._params[name] = value
         return value
 
+    def clear_params(self):
+        """Clears all global parameters."""
+        self._params.clear()
+
     @classmethod
     def instance(cls) -> "StaticScope":
         """Returns singleton instance."""
@@ -220,6 +224,11 @@ def param(name: str, value: Optional[Any] = _EMPTY_PARAM) -> Optional[Any]:
     return StaticScope.instance().param(name, value)
 
 
+def clear_params():
+    """Clears all global parameters."""
+    StaticScope.instance().clear_params()
+
+
 class ColumnScope:
     """Caches and retrieves column data queried from :class:`pandas.DataFrame`.
 

tests/test_scope.py

@@ -517,3 +517,12 @@ def test_get_signals(
             ind_data[IndicatorSymbol(ind_name, sym)].values,
             equal_nan=True,
         )
+
+
+def test_clear_params(scope):
+    scope.clear_params()
+    param("alpha", 0.1)
+    param("beta", 0.2)
+    assert scope._params == {"alpha": 0.1, "beta": 0.2}
+    scope.clear_params()
+    assert scope._params == {}