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metrology 0.7.3

A library to easily measure what's going on in your python.

Latest Version: 0.10.0

A library to easily measure what's going on in your python.

Metrology allows you to add instruments to your python code and hook them to external reporting tools like Graphite so as to better understand what's going on in your running python program.

Installing

To install :

pip install metrology

API

Gauge

A gauge is an instantaneous measurement of a value

class JobGauge(metrology.instruments.Gauge):
    def value(self):
        return len(queue)
gauge = Metrology.gauge('pending-jobs', JobGauge())

Counters

A counter is like a gauge, but you can increment or decrement its value

counter = Metrology.counter('pending-jobs')
counter.increment()
counter.decrement()
counter.count

Meters

A meter measures the rate of events over time (e.g., "requests per second"). In addition to the mean rate, you can also track 1, 5 and 15 minutes moving averages

meter = Metrology.meter('requests')
meter.mark()
meter.count

Timers

A timer measures both the rate that a particular piece of code is called and the distribution of its duration

timer = Metrology.timer('responses')
with timer:
    do_something()

Utilization Timer

A specialized timer that calculates the percentage of wall-clock time that was spent

utimer = Metrology.utilization_timer('responses')
with utimer:
  do_something()

Profilers

A profiler measures the distribution of the duration passed in a every part of the code

profiler = Metrology.profiler('slow-code')
with profiler:
    run_slow_code()

Reporters

Logger Reporter

A logging reporter that write metrics to a logger

reporter = LoggerReporter(level=logging.INFO, interval=10)
reporter.start()

Graphite Reporter

A graphite reporter that send metrics to graphite

reporter = GraphiteReporter('graphite.local', 2003)
reporter.start()

Librato Reporter

A librator metric reporter that send metrics to librato API

reporter = LibratoReporter("<email>", "<token>")
reporter.start()

Acknowledgement

This is heavily inspired by the awesome metrics library.

 
File Type Py Version Uploaded on Size
metrology-0.7.3.tar.gz (md5) Source 2013-04-25 17KB
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  • Author: Timothée Peignier
  • Home Page: https://github.com/cyberdelia/metrology
  • License:
    Copyright (©) 2012 Timothée Peignier <timothee.peignier@tryphon.org>
    
    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:
    
    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.
    
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.
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  • DOAP record: metrology-0.7.3.xml