Use self.data[...] instead of self[...]

Author: A5rocks

src/trio/_core/_instrumentation.py

@@ -35,8 +35,7 @@ class Instruments(UserDict[str, dict[Instrument, None]]):
     __slots__ = ()
 
     def __init__(self, incoming: Sequence[Instrument]) -> None:
-        super().__init__({})
-        self["_all"] = {}
+        super().__init__({"_all": {}})
         for instrument in incoming:
             self.add_instrument(instrument)
 
@@ -50,9 +49,9 @@ def add_instrument(self, instrument: Instrument) -> None:
         If ``instrument`` is already active, does nothing.
 
         """
-        if instrument in self["_all"]:
+        if instrument in self.data["_all"]:
             return
-        self["_all"][instrument] = None
+        self.data["_all"][instrument] = None
         try:
             for name in dir(instrument):
                 if name.startswith("_"):
@@ -65,7 +64,7 @@ def add_instrument(self, instrument: Instrument) -> None:
                 if isinstance(impl, types.MethodType) and impl.__func__ is prototype:
                     # Inherited unchanged from _abc.Instrument
                     continue
-                self.setdefault(name, {})[instrument] = None
+                self.data.setdefault(name, {})[instrument] = None
         except:
             self.remove_instrument(instrument)
             raise
@@ -85,12 +84,12 @@ def remove_instrument(self, instrument: Instrument) -> None:
 
         """
         # If instrument isn't present, the KeyError propagates out
-        self["_all"].pop(instrument)
-        for hookname, instruments in list(self.items()):
+        self.data["_all"].pop(instrument)
+        for hookname, instruments in list(self.data.items()):
             if instrument in instruments:
                 del instruments[instrument]
                 if not instruments:
-                    del self[hookname]
+                    del self.data[hookname]
 
     def call(
         self,
@@ -105,7 +104,7 @@ def call(
             if "before_task_step" in instruments:
                 instruments.call("before_task_step", task)
         """
-        for instrument in list(self[hookname]):
+        for instrument in list(self.data[hookname]):
             try:
                 getattr(instrument, hookname)(*args)
             except BaseException: