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# encoding=UTF-8
# Copyright © 2008, 2009 Jakub Wilk <jwilk@jwilk.net>
#
# This package is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 dated June, 1991.
#
# This package is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
import re
import exceptions
import warnings
import weakref
class NotOverriddenWarning(exceptions.UserWarning):
pass
def not_overridden(f):
r'''
>>> warnings.filterwarnings('error', category=NotOverriddenWarning)
>>> class B(object):
... @not_overridden
... def f(self, x, y): pass
>>> class C(B):
... def f(self, x, y): return x * y
>>> B().f(6, 7)
Traceback (most recent call last):
...
NotOverriddenWarning: `lib.varietes.B.f()` is not overriden
>>> C().f(6, 7)
42
'''
def new_f(self, *args, **kwargs):
cls = type(self)
warnings.warn(
'`%s.%s.%s()` is not overriden' % (cls.__module__, cls.__name__, f.__name__),
category = NotOverriddenWarning,
stacklevel = 2
)
return f(self, *args, **kwargs)
return new_f
def wref(o):
r'''
Return a weak reference to object. This is almost the same as
`weakref.ref()`, but accepts `None` too.
>>> class O(object):
... pass
>>> x = O()
>>> xref = wref(x)
>>> xref() is x
True
>>> del x
>>> xref() is None
True
>>> xref = wref(None)
>>> xref() is None
True
'''
if o is None:
ref = weakref.ref(set())
assert ref() is None
else:
ref = weakref.ref(o)
return ref
def indents_to_tree(lines):
r'''
>>> lines = [
... 'bacon',
... ' egg',
... ' eggs',
... 'ham',
... ' sausage',
... ' spam',
... ' bacon',
... ' egg'
... ]
>>> indents_to_tree(lines)
[None, ['bacon', ['egg', ['eggs']]], ['ham', ['sausage'], ['spam', ['bacon']], ['egg']]]
'''
root = [None]
memo = [(-1, root)]
for line in lines:
old_len = len(line)
line = line.lstrip()
current = [line]
indent = old_len - len(line)
while memo[-1][0] >= indent:
memo.pop()
memo[-1][1].append(current)
memo += (indent, current),
return root
URI_SPECIAL_CHARACTERS = \
(
':/?#[]@' + # RFC 3986, `gen-delims`
'!$&()*+,;=' + # RFC 3986, `sub-delims`
'%' # RFC 3986, `pct-encoded`
)
def fix_uri(s):
r'''
>>> uri = 'http://eggs.spam/'
>>> fix_uri(uri) == uri
True
>>> uri = fix_uri('http://eggs.spam/eggs and spam/')
>>> uri
'http://eggs.spam/eggs%20and%20spam/'
>>> fix_uri(uri) == uri
True
'''
from urllib import quote
if isinstance(s, unicode):
s = s.encode('UTF-8')
return quote(s, safe=URI_SPECIAL_CHARACTERS)
replace_control_characters = re.compile('[\0-\x1f]+').sub
_is_html_color = re.compile('^[#][0-9a-fA-F]{6}$').match
def is_html_color(s):
'''
>>> is_html_color('#000000')
True
>>> is_html_color('#ffffff')
True
>>> is_html_color('#FFFFFF')
True
>>> is_html_color('#c0c0f0')
True
>>> is_html_color('')
False
>>> is_html_color('#bcdefg')
False
>>> is_html_color('#ffffff ')
False
>>> is_html_color(' #ffffff')
False
'''
return bool(_is_html_color(s))
class idict(object):
'''
>>> o = idict(eggs = 'spam', ham = 'eggs')
>>> o
lib.varietes.idict(eggs='spam', ham='eggs')
>>> o.eggs
'spam'
>>> o.ham
'eggs'
>>> o.spam
Traceback (most recent call last):
...
AttributeError: 'idict' object has no attribute 'spam'
'''
def __init__(self, **kwargs):
self.__dict__.update(kwargs)
def __repr__(self):
return '%s.%s(%s)' % \
(
self.__module__,
self.__class__.__name__,
', '.join('%s=%r' % (k, v) for k, v in self.__dict__.iteritems())
)
# vim:ts=4 sw=4 et
|
