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The AWS X-Ray SDK for Python (the SDK) enables Python developers to record and emit information from within their applications to the AWS X-Ray service.

Project description

# AWS X-Ray SDK for Python <sup><sup><sup>(beta)</sup></sup></sup>

![Screenshot of the AWS X-Ray console](/images/example_servicemap.png?raw=true)

## Installing

The AWS X-Ray SDK for Python is compatible with Python 2.7, 3.4, 3.5, and 3.6.

Install the SDK using the following command (the SDK's non-testing dependencies will be installed).

```
pip install aws-xray-sdk
```

To install the SDK's testing dependencies, use the following command.

```
pip install tox
```

## Getting Help

Use the following community resources for getting help with the SDK. We use the GitHub
issues for tracking bugs and feature requests.

* Ask a question in the [AWS X-Ray Forum](https://forums.aws.amazon.com/forum.jspa?forumID=241&start=0).
* Open a support ticket with [AWS Support](http://docs.aws.amazon.com/awssupport/latest/user/getting-started.html).
* If you think you may have found a bug, open an [issue](https://github.com/aws/aws-xray-sdk-python/issues/new).

## Opening Issues

If you encounter a bug with the AWS X-Ray SDK for Python, we want to hear about
it. Before opening a new issue, search the [existing issues](https://github.com/aws/aws-xray-sdk-python/issues)
to see if others are also experiencing the issue. Include the version of the AWS X-Ray
SDK for Python, Python language, and botocore/boto3 if applicable. In addition,
include the repro case when appropriate.

The GitHub issues are intended for bug reports and feature requests. For help and
questions about using the AWS SDK for Python, use the resources listed
in the [Getting Help](https://github.com/aws/aws-xray-sdk-python#getting-help) section. Keeping the list of open issues lean helps us respond in a timely manner.

## Documentation

The [developer guide](https://docs.aws.amazon.com/xray/latest/devguide) provides in-depth
guidance about using the AWS X-Ray service.
The [API Reference](http://docs.aws.amazon.com/xray-sdk-for-python/latest/reference/)
provides guidance for using the SDK and module-level documentation.

## Quick Start

**Configuration**

```python
from aws_xray_sdk.core import xray_recorder

xray_recorder.configure(
sampling=False,
context_missing='LOG_ERROR',
plugins=('EC2Plugin', 'ECSPlugin', 'ElasticBeanstalkPlugin'),
daemon_address='127.0.0.1:3000',
dynamic_naming='*mysite.com*'
)
```

**Start a custom segment/subsegment**

```python
from aws_xray_sdk.core import xray_recorder

# Start a segment
segment = xray_recorder.begin_segment('segment_name')
# Start a subsegment
subsegment = xray_recorder.begin_subsegment('subsegment_name')

# Add metadata or annotation here if necessary
segment.put_metadata('key', dict, 'namespace')
subsegment.put_annotation('key', 'value')
xray_recorder.end_subsegment()

# Close the segment
xray_recorder.end_segment()
```

**Capture**

```python
from aws_xray_sdk.core import xray_recorder

@xray_recorder.capture('subsegment_name')
def myfunc():
# Do something here

myfunc()
```

```python
from aws_xray_sdk.core import xray_recorder

@xray_recorder.capture_async('subsegment_name')
async def myfunc():
# Do something here

async def main():
await myfunc()
```

**Trace AWS Lambda functions**

```python
from aws_xray_sdk.core import xray_recorder

def lambda_handler(event, context):
# ... some code

subsegment = xray_recorder.begin_subsegment('subsegment_name')
# Code to record
# Add metadata or annotation here, if necessary
subsegment.put_metadata('key', dict, 'namespace')
subsegment.put_annotation('key', 'value')

xray_recorder.end_subsegment()

# ... some other code
```

**Patch third-party libraries**

```python
from aws_xray_sdk.core import patch

libs_to_patch = ('boto3', 'mysql', 'requests')
patch(libs_to_patch)
```

**Add Django middleware**

In django settings.py, use the following.

```python
INSTALLED_APPS = [
# ... other apps
'aws_xray_sdk.ext.django',
]

MIDDLEWARE = [
'aws_xray_sdk.ext.django.middleware.XRayMiddleware',
# ... other middlewares
]
```

**Add Flask middleware**

```python
from aws_xray_sdk.core import xray_recorder
from aws_xray_sdk.ext.flask.middleware import XRayMiddleware

app = Flask(__name__)

xray_recorder.configure(service='fallback_name', dynamic_naming='*mysite.com*')
XRayMiddleware(app, xray_recorder)
```

**Add aiohttp middleware**
```python
from aiohttp import web

from aws_xray_sdk.ext.aiohttp.middleware import middleware
from aws_xray_sdk.core import xray_recorder
from aws_xray_sdk.core.async_context import AsyncContext

xray_recorder.configure(service='fallback_name', context=AsyncContext())

app = web.Application(middlewares=[middleware])
app.router.add_get("/", handler)

web.run_app(app)
```

## License

The AWS X-Ray SDK for Python is licensed under the Apache 2.0 License. See LICENSE and NOTICE.txt for more information.


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