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This module implements a class for handling URLs.
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This is an abstract superclass for different kinds of URLs
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Like ``.var(...)``, except overwrites keys, where .var simply
extends the keys. Setting a variable to None here will
effectively delete it.
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Creates a copy of this URL, but with all the variables set/reset
(like .setvar(), except clears past variables at the same time)
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Return the content for a tag (for self.html); return None
for an empty tag (like ``![]()
``)
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>>> u = URL('http://localhost')
>>> u
>>> u = u['view']
>>> str(u)
'http://localhost/view'
>>> u['//foo'].param(content='view').html
'view'
>>> u.param(confirm='Really?', content='goto').html
'goto'
>>> u(title='See "it"', content='goto').html
'goto'
>>> u('another', var='fuggetaboutit', content='goto').html
'goto'
>>> u.attr(content='goto').html
Traceback (most recent call last):
....
ValueError: You must give a content param to generate anchor tags
>>> str(u['foo=bar%20stuff'])
'http://localhost/view?foo=bar+stuff'
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>>> i = Image('/images')
>>> i = i / '/foo.png'
>>> i.html
'
'
>>> str(i['alt=foo'])
''
>>> i.href
'/images/foo.png'
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>>> u = URL('/')
>>> u = u / 'delete'
>>> b = u.button['confirm=Sure?'](id=5, content='del')
>>> str(b)
''
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>>> u = URL('/')
>>> u = u / 'view'
>>> j = u.js_popup(content='view')
>>> j.html
'view'
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