Url is constructed from str:

>>> from yarl import URL
>>> url = URL('https://www.python.org/~guido?arg=1#frag')
>>> url
URL('https://www.python.org/~guido?arg=1#frag')

All url parts: scheme, user, password, host, port, path, query and fragment are accessible by properties:

>>> url.scheme
'https'
>>> url.host
'www.python.org'
>>> url.path
'/~guido'
>>> url.query_string
'arg=1'
>>> url.query
<MultiDictProxy('arg': '1')>
>>> url.fragment
'frag'

All url manipulations produce a new url object:

>>> url = URL('https://www.python.org')
>>> url / 'foo' / 'bar'
URL('https://www.python.org/foo/bar')
>>> url / 'foo' % {'bar': 'baz'}
URL('https://www.python.org/foo?bar=baz')

Strings passed to constructor and modification methods are automatically encoded giving canonical representation as result:

>>> url = URL('https://www.python.org/путь')
>>> url
URL('https://www.python.org/%D0%BF%D1%83%D1%82%D1%8C')

Regular properties are percent-decoded, use raw_ versions for getting encoded strings:

>>> url.path
'/путь'

>>> url.raw_path
'/%D0%BF%D1%83%D1%82%D1%8C'

Human readable representation of URL is available as .human_repr():

>>> url.human_repr()
'https://www.python.org/путь'

For full documentation please read https://yarl.readthedocs.org.

$ pip install yarl

The library is Python 3 only!

PyPI contains binary wheels for Linux, Windows and MacOS. If you want to install yarl on another operating system (like Alpine Linux, which is not manylinux-compliant because of the missing glibc and therefore, cannot be used with our wheels) the the tarball will be used to compile the library from the source code. It requires a C compiler and and Python headers installed.

To skip the compilation you must explicitly opt-in by setting the YARL_NO_EXTENSIONS environment variable to a non-empty value, e.g.:

$ YARL_NO_EXTENSIONS=1 pip install yarl

Please note that the pure-Python (uncompiled) version is much slower. However, PyPy always uses a pure-Python implementation, and, as such, it is unaffected by this variable.

YARL requires multidict library.

The documentation is located at https://yarl.readthedocs.org

There is no standard for boolean representation of boolean values.

Some systems prefer true/false, others like yes/no, on/off, Y/N, 1/0, etc.

yarl cannot make an unambiguous decision on how to serialize bool values because it is specific to how the end-user's application is built and would be different for different apps. The library doesn't accept booleans in the API; a user should convert bools into strings using own preferred translation protocol.

• furl (https://pypi.python.org/pypi/furl)

  The library has rich functionality but the furl object is mutable.

  I'm afraid to pass this object into foreign code: who knows if the code will modify my url in a terrible way while I just want to send URL with handy helpers for accessing URL properties.

  furl has other non-obvious tricky things but the main objection is mutability.

• URLObject (https://pypi.python.org/pypi/URLObject)

  URLObject is immutable, that's pretty good.

  Every URL change generates a new URL object.

  But the library doesn't do any decode/encode transformations leaving the end user to cope with these gory details.

The project is hosted on GitHub

Please file an issue on the bug tracker if you have found a bug or have some suggestion in order to improve the library.

The library uses Azure Pipelines for Continuous Integration.

aio-libs google group: https://groups.google.com/forum/#!forum/aio-libs

Feel free to post your questions and ideas here.

The yarl package is written by Andrew Svetlov.

It's Apache 2 licensed and freely available.