Align the pure python implementation with the cython one - Event doesn't require a tracer instance.

Author: ionelmc

src/hunter/event.py

@@ -11,7 +11,6 @@
 from .const import SYS_PREFIX_PATHS
 from .util import CYTHON_SUFFIX_RE
 from .util import LEADING_WHITESPACE_RE
-from .util import MISSING
 from .util import cached_property
 from .util import get_func_in_mro
 from .util import get_main_thread
@@ -47,23 +46,10 @@ def __init__(
         frame,
         kind,
         arg,
-        tracer=None,
-        depth=None,
-        calls=None,
-        threading_support=MISSING,
+        depth,
+        calls,
+        threading_support,
     ):
-        if tracer is None:
-            if depth is None:
-                raise TypeError('Missing argument: depth (required because tracer was not given).')
-            if calls is None:
-                raise TypeError('Missing argument: calls (required because tracer was not given).')
-            if threading_support is MISSING:
-                raise TypeError('Missing argument: threading_support (required because tracer was not given).')
-        else:
-            depth = tracer.depth
-            calls = tracer.calls
-            threading_support = tracer.threading_support
-
         #: The original Frame object.
         #:
         #: .. note::

src/hunter/tracer.py

@@ -78,7 +78,7 @@ def __call__(self, frame, kind, arg):
         if self._handler is not None:
             if kind == 'return' and self.depth > 0:
                 self.depth -= 1
-            event = Event(frame, kind, arg, self)
+            event = Event(frame, kind, arg, self.depth, self.calls, self.threading_support)
             try:
                 self._handler(event)
             except Exception as exc:

tests/test_predicates.py

@@ -50,7 +50,9 @@ def mockevent():
         sys._getframe(0),
         2 if '_event' in hunter.Event.__module__ else 'line',
         None,
-        hunter.Tracer(),
+        0,
+        0,
+        False,
     )