bugfix: resolves #31 aiohttp lazy import

Author: heitorlessa

Diff for: python/HISTORY.md

@@ -1,5 +1,11 @@
 # HISTORY 
 
+## May 14th
+
+**0.9.2**
+
+* **Tracer**: Bugfix - aiohttp lazy import so it's not a hard dependency
+
 ## May 12th
 
 **0.9.0**

Diff for: python/README.md

@@ -142,6 +142,8 @@ You can use `tracer.provider` attribute to access all methods provided by `xray_
 
 **Example using aiohttp with an async context manager**
 
+> NOTE: It expects you have `aiohttp` as a dependency. `aiohttp_trace_config` uses lazy import to create a trace_config object following `aiohttp` protocol.
+
 ```python
 import asyncio
 import aiohttp

Diff for: python/aws_lambda_powertools/tracing/__init__.py

@@ -1,10 +1,8 @@
 """Tracing utility
 """
-from aws_xray_sdk.ext.aiohttp.client import aws_xray_trace_config as aiohttp_trace_config
 
-from .tracer import Tracer
-
-aiohttp_trace_config.__doc__ = "aiohttp extension for X-Ray (aws_xray_trace_config)"
 
+from .extensions import aiohttp_trace_config
+from .tracer import Tracer
 
 __all__ = ["Tracer", "aiohttp_trace_config"]

Diff for: python/aws_lambda_powertools/tracing/extensions.py

@@ -0,0 +1,15 @@
+def aiohttp_trace_config():
+    """aiohttp extension for X-Ray (aws_xray_trace_config)
+
+    It expects you to have aiohttp as a dependency.
+
+    Returns
+    -------
+    TraceConfig
+        aiohttp trace config
+    """
+    from aws_xray_sdk.ext.aiohttp.client import aws_xray_trace_config
+
+    aws_xray_trace_config.__doc__ = "aiohttp extension for X-Ray (aws_xray_trace_config)"
+
+    return aws_xray_trace_config()

Diff for: python/pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "aws_lambda_powertools"
-version = "0.9.0"
+version = "0.9.2"
 description = "Python utilities for AWS Lambda functions including but not limited to tracing, logging and custom metric"
 authors = ["Amazon Web Services"]
 classifiers=[