This document is for an old version of Python that is no longer supported. You should upgrade, and read the Python documentation for the current stable release.

21.10. urllib.robotparser — Parser for robots.txt

This module provides a single class, RobotFileParser, which answers questions about whether or not a particular user agent can fetch a URL on the Web site that published the robots.txt file. For more details on the structure of robots.txt files, see

class urllib.robotparser.RobotFileParser(url='')

This class provides methods to read, parse and answer questions about the robots.txt file at url.


Sets the URL referring to a robots.txt file.


Reads the robots.txt URL and feeds it to the parser.


Parses the lines argument.

can_fetch(useragent, url)

Returns True if the useragent is allowed to fetch the url according to the rules contained in the parsed robots.txt file.


Returns the time the robots.txt file was last fetched. This is useful for long-running web spiders that need to check for new robots.txt files periodically.


Sets the time the robots.txt file was last fetched to the current time.

The following example demonstrates basic use of the RobotFileParser class.

>>> import urllib.robotparser
>>> rp = urllib.robotparser.RobotFileParser()
>>> rp.set_url("")
>>> rp.can_fetch("*", "")
>>> rp.can_fetch("*", "")

Previous topic

21.9. urllib.error — Exception classes raised by urllib.request

Next topic

21.11. http — HTTP modules

This Page