Cross-language UserAgent classifier library, python implementation

web, user-agent, parser
pip install woothee==1.10.1


Woothee python latest version license

The Python implementation of Project Woothee, which is multi-language user-agent strings parsers.


$ pip install woothee


Parsing user-agent

import woothee
woothee.parse("Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)")
# => {'name': 'Internet Explorer', 'category': 'pc', 'os': 'Windows 7', 'version': '8.0', 'vendor': 'Microsoft', 'os_version': 'NT 6.1'}

Parse user-agent string and returns a object with keys name, category, os, version, vendor and os_version.

For unknown user-agent (or partially failed to parse), result objects may have value 'UNKNOWN'.

  • category
    • labels of user terminal type, one of 'pc', 'smartphone', 'mobilephone', 'appliance', 'crawler' or 'misc' (or 'UNKNOWN')
  • name
    • the name of browser, like 'Internet Explorer', 'Firefox', 'GoogleBot'
  • version
    • version string, like '8.0' for IE, '9.0.1' for Firefix, '' for Chrome, and so on
  • os
    • ex: 'Windows 7', 'Mac OSX', 'iPhone', 'iPad', 'Android'
    • This field used to indicate cellar phone carrier for category 'mobilephone'
  • vendor
    • optional field, shows browser vendor
  • os_version
    • optional field, shows version of operating systems

Finding crawlers (almost all, not all) in fast

woothee.is_crawler('Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)')
# => False

Try to see useragent's category is 'crawler' or not, by casual(fast) method. Minor case of crawlers is not tested in this method. To check crawler strictly, use woothee.parse(str)['category'] == 'crawler'.



Copyright 2012- TAGOMORI Satoshi (tagomoris)

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


1.10.1(Aug 8, 2019)

1.10.0(Apr 14, 2019)

1.8.0(Jul 5, 2018)

1.7.0(May 7, 2017)

  • #12 Release v1.7.0
  • Add support for WebView on Android.
  • Add support for curl.
  • Add support for trendictionbot crawler.
  • Add support for Yeti 1.1.
  • Compatible with Python 3.6.
  • Caution. We'll drop Python2.6 and python3.2 support in the next version.

1.5.0(Aug 16, 2016)

1.4.0(May 17, 2016)

  • Add support for Vivaldi

1.3.0(Jan 7, 2016)

  • Add support for Firefox for iOS

1.2.0(Aug 16, 2015)

  • Add support for Twitterbot
  • Add support for webviews of mobile devices
  • Add support for Windows 10 and Edge browser
  • Add support for BlackBerry10

1.1.0(Mar 1, 2015)

1.0.0(Jan 20, 2015)

  • First release