first commit

dashboard/flask-server/venv/Lib/site-packages/pandas/compat/chainmap.py

@@ -0,0 +1,35 @@
+from typing import (
+    ChainMap,
+    TypeVar,
+)
+
+_KT = TypeVar("_KT")
+_VT = TypeVar("_VT")
+
+
+class DeepChainMap(ChainMap[_KT, _VT]):
+    """
+    Variant of ChainMap that allows direct updates to inner scopes.
+
+    Only works when all passed mapping are mutable.
+    """
+
+    def __setitem__(self, key: _KT, value: _VT) -> None:
+        for mapping in self.maps:
+            if key in mapping:
+                mapping[key] = value
+                return
+        self.maps[0][key] = value
+
+    def __delitem__(self, key: _KT) -> None:
+        """
+        Raises
+        ------
+        KeyError
+            If `key` doesn't exist.
+        """
+        for mapping in self.maps:
+            if key in mapping:
+                del mapping[key]
+                return
+        raise KeyError(key)