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<!DOCTYPE html>
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<meta name="description" content="Full Stack Python shows how an entire Python web application is built and deployed. Each section of the guide explains a different key concept, from the server through the Python WSGI web framework to the front end JavaScript.">
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<h1>Logging</h1>
<p>Logging is a common mechanism for monitoring web applications written with a
web framework. Runtime exceptions that prevent code from running are
important to log to investigate and fix the source of the problems.
Informational and debugging logging also helps to understand how the
application is performing even if code is working as intended.</p>
<p>Logging is often grouped into several categories:</p>
<ol>
<li>Information</li>
<li>Debug</li>
<li>Warning</li>
<li>Error</li>
</ol>
<p>Logging errors that occur while a web framework is running is crucial to
understanding how your application is performing.
<a href="http://raven.readthedocs.org/en/latest/">Raven</a> is a Python client for the
<a href="https://github.com/getsentry/sentry">Sentry</a> exception logging and
aggregation application. Raven provides the way to send exceptions to
Sentry, which should be deployed on a separate server from your production
infrastructure. Raven can also be used by Python scripts to send other
log data to Sentry for aggregation. Sentry provides a clean web application
interface for viewing the exceptions. Sentry can also be configured with a
mail plugin to send emails when exceptions occur.</p>
<br/>
Next read the
<a href="/monitoring.html">monitoring</a> section.
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<a href="/logging.html" class="list-group-item active">Logging</a>
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<a href="/configuration-management.html" class="list-group-item ">Configuration Management</a>
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<a href="http://www.mattmakai.com/" class="underline">Matt Makai</a> 2014
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