Skip to main content

Parsel is a library to extract data from HTML and XML using XPath and CSS selectors

Project description

Build Status PyPI Version Coverage report

Parsel is a library to extract data from HTML and XML using XPath and CSS selectors

Features

  • Extract text using CSS or XPath selectors

  • Regular expression helper methods

Example:

>>> from parsel import Selector
>>> sel = Selector(text=u"""<html>
        <body>
            <h1>Hello, Parsel!</h1>
            <ul>
                <li><a href="http://example.com">Link 1</a></li>
                <li><a href="http://scrapy.org">Link 2</a></li>
            </ul>
        </body>
        </html>""")
>>>
>>> sel.css('h1::text').get()
'Hello, Parsel!'
>>>
>>> sel.css('h1::text').re('\w+')
['Hello', 'Parsel']
>>>
>>> for e in sel.css('ul > li'):
...     print(e.xpath('.//a/@href').get())
http://example.com
http://scrapy.org

History

1.5.2 (2019-08-09)

  • Selector.remove_namespaces received a significant performance improvement

  • The value of data within the printable representation of a selector (repr(selector)) now ends in ... when truncated, to make the truncation obvious.

  • Minor documentation improvements.

1.5.1 (2018-10-25)

  • has-class XPath function handles newlines and other separators in class names properly;

  • fixed parsing of HTML documents with null bytes;

  • documentation improvements;

  • Python 3.7 tests are run on CI; other test improvements.

1.5.0 (2018-07-04)

  • New Selector.attrib and SelectorList.attrib properties which make it easier to get attributes of HTML elements.

  • CSS selectors became faster: compilation results are cached (LRU cache is used for css2xpath), so there is less overhead when the same CSS expression is used several times.

  • .get() and .getall() selector methods are documented and recommended over .extract_first() and .extract().

  • Various documentation tweaks and improvements.

One more change is that .extract() and .extract_first() methods are now implemented using .get() and .getall(), not the other way around, and instead of calling Selector.extract all other methods now call Selector.get internally. It can be backwards incompatible in case of custom Selector subclasses which override Selector.extract without doing the same for Selector.get. If you have such Selector subclass, make sure get method is also overridden. For example, this:

class MySelector(parsel.Selector):
    def extract(self):
        return super().extract() + " foo"

should be changed to this:

class MySelector(parsel.Selector):
    def get(self):
        return super().get() + " foo"
    extract = get

1.4.0 (2018-02-08)

  • Selector and SelectorList can’t be pickled because pickling/unpickling doesn’t work for lxml.html.HtmlElement; parsel now raises TypeError explicitly instead of allowing pickle to silently produce wrong output. This is technically backwards-incompatible if you’re using Python < 3.6.

1.3.1 (2017-12-28)

  • Fix artifact uploads to pypi.

1.3.0 (2017-12-28)

  • has-class XPath extension function;

  • parsel.xpathfuncs.set_xpathfunc is a simplified way to register XPath extensions;

  • Selector.remove_namespaces now removes namespace declarations;

  • Python 3.3 support is dropped;

  • make htmlview command for easier Parsel docs development.

  • CI: PyPy installation is fixed; parsel now runs tests for PyPy3 as well.

1.2.0 (2017-05-17)

  • Add SelectorList.get and SelectorList.getall methods as aliases for SelectorList.extract_first and SelectorList.extract respectively

  • Add default value parameter to SelectorList.re_first method

  • Add Selector.re_first method

  • Add replace_entities argument on .re() and .re_first() to turn off replacing of character entity references

  • Bug fix: detect None result from lxml parsing and fallback with an empty document

  • Rearrange XML/HTML examples in the selectors usage docs

  • Travis CI:

    • Test against Python 3.6

    • Test against PyPy using “Portable PyPy for Linux” distribution

1.1.0 (2016-11-22)

  • Change default HTML parser to lxml.html.HTMLParser, which makes easier to use some HTML specific features

  • Add css2xpath function to translate CSS to XPath

  • Add support for ad-hoc namespaces declarations

  • Add support for XPath variables

  • Documentation improvements and updates

1.0.3 (2016-07-29)

  • Add BSD-3-Clause license file

  • Re-enable PyPy tests

  • Integrate py.test runs with setuptools (needed for Debian packaging)

  • Changelog is now called NEWS

1.0.2 (2016-04-26)

  • Fix bug in exception handling causing original traceback to be lost

  • Added docstrings and other doc fixes

1.0.1 (2015-08-24)

  • Updated PyPI classifiers

  • Added docstrings for csstranslator module and other doc fixes

1.0.0 (2015-08-22)

  • Documentation fixes

0.9.6 (2015-08-14)

  • Updated documentation

  • Extended test coverage

0.9.5 (2015-08-11)

  • Support for extending SelectorList

0.9.4 (2015-08-10)

  • Try workaround for travis-ci/dpl#253

0.9.3 (2015-08-07)

  • Add base_url argument

0.9.2 (2015-08-07)

  • Rename module unified -> selector and promoted root attribute

  • Add create_root_node function

0.9.1 (2015-08-04)

  • Setup Sphinx build and docs structure

  • Build universal wheels

  • Rename some leftovers from package extraction

0.9.0 (2015-07-30)

  • First release on PyPI.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

parsel-1.5.2.tar.gz (41.1 kB view details)

Uploaded Source

Built Distribution

parsel-1.5.2-py2.py3-none-any.whl (12.4 kB view details)

Uploaded Python 2 Python 3

File details

Details for the file parsel-1.5.2.tar.gz.

File metadata

  • Download URL: parsel-1.5.2.tar.gz
  • Upload date:
  • Size: 41.1 kB
  • Tags: Source
  • Uploaded using Trusted Publishing? No
  • Uploaded via: twine/1.13.0 pkginfo/1.5.0.1 requests/2.22.0 setuptools/41.0.1 requests-toolbelt/0.9.1 tqdm/4.33.0 CPython/2.7.15

File hashes

Hashes for parsel-1.5.2.tar.gz
Algorithm Hash digest
SHA256 4da4262ba4605573b6b72a5f557616a2fc9dee7a47a1efad562752a28d366723
MD5 ce62741710099d19915c09f4a612ca46
BLAKE2b-256 1dfe9a98cffa4abe7ade88b19a7173801d300900ead2407aba9c52059d03c54f

See more details on using hashes here.

File details

Details for the file parsel-1.5.2-py2.py3-none-any.whl.

File metadata

  • Download URL: parsel-1.5.2-py2.py3-none-any.whl
  • Upload date:
  • Size: 12.4 kB
  • Tags: Python 2, Python 3
  • Uploaded using Trusted Publishing? No
  • Uploaded via: twine/1.13.0 pkginfo/1.5.0.1 requests/2.22.0 setuptools/41.0.1 requests-toolbelt/0.9.1 tqdm/4.33.0 CPython/2.7.15

File hashes

Hashes for parsel-1.5.2-py2.py3-none-any.whl
Algorithm Hash digest
SHA256 74f8e9d3b345b14cb1416bd777a03982cde33a74d8b32e0c71e651d07d41d40a
MD5 778a09916a6d467e7650cae98ba1280b
BLAKE2b-256 86c8fc5a2f9376066905dfcca334da2a25842aedfda142c0424722e7c497798b

See more details on using hashes here.

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page