Use functools.wraps in @Instrument

logfire/_internal/instrument.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import contextlib
+import functools
 import inspect
 import warnings
 from collections.abc import Sequence
@@ -105,7 +106,8 @@ def wrapper(*func_args: P.args, **func_kwargs: P.kwargs) -> R:
                 with open_span(*func_args, **func_kwargs):
                     return func(*func_args, **func_kwargs)
 
-        return wrapper  # type: ignore
+        wrapper = functools.wraps(func)(wrapper)  # type: ignore
+        return wrapper
 
     return decorator
 

tests/test_logfire.py

@@ -712,6 +712,7 @@ async def foo():
     )
     assert warnings[0].filename.endswith('test_logfire.py')
     assert warnings[0].lineno == inspect.currentframe().f_lineno - 8  # type: ignore
+    assert foo.__name__ == 'foo'
 
     assert [value async for value in foo()] == [1]
 
@@ -752,6 +753,7 @@ def foo():
     )
     assert warnings[0].filename.endswith('test_logfire.py')
     assert warnings[0].lineno == inspect.currentframe().f_lineno - 8  # type: ignore
+    assert foo.__name__ == 'foo'
 
     assert list(foo()) == [1]
 
@@ -897,6 +899,8 @@ def test_instrument_contextmanager_prevent_warning(exporter: TestExporter):
     def foo():
         yield
 
+    assert foo.__name__ == 'foo'
+
     with foo():
         logfire.info('hello')
 
@@ -944,6 +948,8 @@ async def test_instrument_asynccontextmanager_prevent_warning(exporter: TestExpo
     async def foo():
         yield
 
+    assert foo.__name__ == 'foo'
+
     async with foo():
         logfire.info('hello')
 
@@ -990,6 +996,7 @@ async def test_instrument_async(exporter: TestExporter):
     async def foo():
         return 456
 
+    assert foo.__name__ == 'foo'
     assert await foo() == 456
 
     assert exporter.exported_spans_as_dict(_strip_function_qualname=False) == snapshot(
@@ -1018,6 +1025,8 @@ def test_instrument_extract_false(exporter: TestExporter):
     def hello_world(a: int) -> str:
         return f'hello {a}'
 
+    assert hello_world.__name__ == 'hello_world'
+
     assert hello_world(123) == 'hello 123'
 
     assert exporter.exported_spans_as_dict(_strip_function_qualname=False) == snapshot(