diff --git a/reporters/python/TODO.md b/reporters/python/TODO.md
index 7c67559..dc9790e 100644
--- a/reporters/python/TODO.md
+++ b/reporters/python/TODO.md
@@ -7,7 +7,7 @@
 - [x] Thread safety
 - [x] Manage exiting
 - [x] Check circular references
-- [ ] Add log method
+- [x] Add log method
 - [ ] Export only what's needed and rename to `trace_that`
 - [ ] Manage connection health (stale/reopening/error handling)
 - [ ] Release to pip
diff --git a/reporters/python/example.py b/reporters/python/example.py
index f2588d9..3ba4e0f 100644
--- a/reporters/python/example.py
+++ b/reporters/python/example.py
@@ -3,12 +3,12 @@
 from trace_that import trace_that
 
 @trace_that
-def hello(name: str, greeting='Hello') -> str:
-    time.sleep(1)
+async def hello(name: str, greeting='Hello') -> str:
+    await asyncio.sleep(1)
     return f'{greeting}, {name}!'
 
 async def main():
-    hello(name='Kacper', greeting='Yo')
+    await hello(name='Kacper', greeting='Yo')
 
 if __name__ == '__main__':
     asyncio.run(main())
\ No newline at end of file
diff --git a/reporters/python/json_marhsaller.py b/reporters/python/json_marhsaller.py
index 744623b..1205d46 100644
--- a/reporters/python/json_marhsaller.py
+++ b/reporters/python/json_marhsaller.py
@@ -2,15 +2,16 @@
 
 def serialize(obj, seen=None):
     if seen is None:
-        seen = {}
+        seen = set()
     obj_id = id(obj)
 
     if obj_id in seen:
         # Circular reference detected; return a reference placeholder
         return "<circular reference>"
     
+    seen = seen.copy()
     # Mark the current object as seen
-    seen[obj_id] = obj
+    seen.add(obj_id)
 
     # Handle basic data types
     if isinstance(obj, (str, int, float, bool, type(None))):
diff --git a/reporters/python/log_test.py b/reporters/python/log_test.py
new file mode 100644
index 0000000..b42bdc8
--- /dev/null
+++ b/reporters/python/log_test.py
@@ -0,0 +1,23 @@
+from trace_that import create_log
+import unittest
+
+class MemoryReporter:
+    def __init__(self):
+        self.messages = []
+
+    def send(self, msg: str) -> None:
+        self.messages.append(msg)
+
+class TestLog(unittest.TestCase):
+    def test_log(self):
+        reporter = MemoryReporter()
+        log = create_log(reporter)
+        log('hello', {'a': 1})
+        
+        ok_msg = next(m for m in reporter.messages if m['status'] == 'ok')
+        self.assertIsNotNone(ok_msg)
+        self.assertEqual(ok_msg['name'], 'hello')
+        self.assertEqual(ok_msg['details'], {'a': 1})
+        
+if __name__ == '__main__':    
+    unittest.main()
\ No newline at end of file
diff --git a/reporters/python/trace_that.py b/reporters/python/trace_that.py
index b3f983a..389c5d4 100644
--- a/reporters/python/trace_that.py
+++ b/reporters/python/trace_that.py
@@ -1,18 +1,26 @@
-from typing import Callable, TypeVar, Type
+from typing import Callable, TypeVar, Type, Any
 from typing_extensions import ParamSpec
 import time
 import uuid
 import inspect
 from ws_reporter import WebSocketReporter
 
-class Reporter:
-    def send(self, msg: str) -> None:
-        pass
-
 T = TypeVar('T')
 R = TypeVar('R')
 P = ParamSpec('P')
 
+class TraceThat:
+    def __init__(self, trace_that_fn: Callable[[Callable[P, R]], Callable[P,R]], log: Callable[[str, Any], None]):
+        self.trace_that_fn = trace_that_fn
+        self.log = log
+
+    def __call__(self, func: Callable[P, R]) -> Callable[P, R]:
+        return self.trace_that_fn(func)
+
+class Reporter:
+    def send(self, msg: str) -> None:
+        pass
+
 def create_trace_that(reporter: Type[Reporter]):
     def trace_that(func: Callable[P, R]) -> Callable[P, R]:
         def before(*args: P.args, **kwargs: P.kwargs) -> None:
@@ -87,5 +95,24 @@ async def awaiter():
     
     return trace_that
 
+def create_log(reporter: Type[Reporter]):
+    def log(name: str, msg: any) -> None:
+        print(f'[trace_that] {name} {msg=}')
+        call_id = uuid.uuid4().hex
+        start_time = int(time.time() * 1000)
+        reporter.send({
+            'status': 'ok',
+            'callId': call_id,
+            'name': name,
+            'startEpochMs': start_time,
+            'endEpochMs': start_time,
+            'details': msg
+        })
+        
+    return log
+
+reporter = WebSocketReporter()
+log = create_log(reporter)
+trace_that_fun = create_trace_that(reporter)
 
-trace_that = create_trace_that(WebSocketReporter())
\ No newline at end of file
+trace_that = TraceThat(trace_that_fun, log)