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A simple, immutable URL class with a clean API for interrogation and manipulation.
Python Other
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purl
tests
.gitignore
.travis.yml
AUTHORS
LICENSE
MANIFEST.in
README.rst
TODO
release.sh
requirements.txt
runtests.sh
setup.py

README.rst

purl - A simple Python URL class

A simple, immutable URL class with a clean API for interrogation and manipulation.

Install

From PyPI (stable):

pip install purl

From Github (unstable):

pip install git+git://github.com/codeinthehole/purl.git#egg=purl

Use

Construct:

>>> from purl import URL

# String constructor
>>> from_str = URL('https://www.google.com/search?q=testing')

# Keyword constructor
>>> from_kwargs = URL(scheme='https', host='www.google.com', path='/search', query='q=testing')

# Combine
>>> from_combo = URL('https://www.google.com').path('search').query_param('q', 'testing')

URL objects are immutable - all mutator methods return a new instance.

Interrogate:

>>> u = URL('https://www.google.com/search?q=testing')
>>> u.scheme()
'https'
>>> u.host()
'www.google.com'
>>> u.domain()
'www.google.com'
>>> u.username()
>>> u.password()
>>> u.netloc()
'www.google.com'
>>> u.port()
>>> u.path()
'/search'
>>> u.query()
'q=testing'
>>> u.fragment()
''
>>> u.path_segment(0)
'search'
>>> u.path_segments()
('search',)
>>> u.query_param('q')
'testing'
>>> u.query_param('q', as_list=True)
['testing']
>>> u.query_param('lang', default='GB')
'GB'
>>> u.query_params()
{'q': ['testing']}
>>> u.has_query_param('q')
True
>>> u.has_query_params(('q', 'r'))
False
>>> u.subdomains()
['www', 'google', 'com']
>>> u.subdomain(0)
'www'

Note that each accessor method is overloaded to be a mutator method too, similar to the jQuery API. Eg:

>>> u = URL.from_string('https://github.com/codeinthehole')

# Access
>>> u.path_segment(0)
'codeinthehole'

# Mutate (creates a new instance)
>>> new_url = u.path_segment(0, 'tangentlabs')
>>> new_url is u
False
>>> new_url.path_segment(0)
'tangentlabs'

Hence, you can build a URL up in steps:

>>> u = URL().scheme('http').domain('www.example.com').path('/some/path').query_param('q', 'search term')
>>> u.as_string()
u'http://www.example.com/some/path?q=search+term'

Along with the above overloaded methods, there is also a add_path_segment method for adding a segment at the end of the current path:

>>> new_url = u.add_path_segment('here')
>>> new_url.as_string()
u'http://www.example.com/some/path/here?q=search+term'

Couple of other things:

  • Since the URL class is immutable it can be used as a key in a dictionary
  • It can be picked and restored
  • It supports equality operations

Changelog

v0.4

  • Modified constructor to accept full URL string as first arg
  • Added add_path_segment method

v0.3.2

  • Fixed bug port number in string when using from_string constructor

v0.3.1

  • Fixed bug with passing lists to query param setter methods

v0.3

  • Added support for comparison and equality
  • Added support for pickling
  • Added __slots__ so instances can be used as keys within dictionaries

Contribute

Clone and install testing dependencies:

pip install -r requirements.txt

Ensure tests pass:

./runtests.sh

Hack away

Build status

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