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d j o d d k Z e i n d S( s< Helpers that are neither text, numeric, container, or date.
i’’’’Nc C s" x t i | | D] } t SWt S( s± Is ``pred(elm)`` true for all elements?
With the default predicate, this is the same as Python 2.5's ``all()``
function; i.e., it returns true if all elements are true.
>>> all(["A", "B"])
True
>>> all(["A", ""])
False
>>> all(["", ""])
False
>>> all(["A", "B", "C"], lambda x: x <= "C")
True
>>> all(["A", "B", "C"], lambda x: x < "C")
False
From recipe in itertools docs.
( t itertoolst ifilterfalset Falset True( t seqt predt elm( ( s3 /usr/lib/python2.6/site-packages/webhelpers/misc.pyt all s c C s" x t i | | D] } t SWt S( sÆ Is ``pred(elm)`` is true for any element?
With the default predicate, this is the same as Python 2.5's ``any()``
function; i.e., it returns true if any element is true.
>>> any(["A", "B"])
True
>>> any(["A", ""])
True
>>> any(["", ""])
False
>>> any(["A", "B", "C"], lambda x: x <= "C")
True
>>> any(["A", "B", "C"], lambda x: x < "C")
True
From recipe in itertools docs.
( R t ifilterR R ( R R R ( ( s3 /usr/lib/python2.6/site-packages/webhelpers/misc.pyt any s c C s" x t i | | D] } t SWt S( sq Is ``pred(elm)`` false for all elements?
With the default predicate, this returns true if all elements are false.
>>> no(["A", "B"])
False
>>> no(["A", ""])
False
>>> no(["", ""])
True
>>> no(["A", "B", "C"], lambda x: x <= "C")
False
>>> no(["X", "Y", "Z"], lambda x: x <="C")
True
From recipe in itertools docs.
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q
W| S( sM How many elements is ``pred(elm)`` true for?
With the default predicate, this counts the number of true elements.
>>> count_true([1, 2, 0, "A", ""])
3
>>> count_true([1, "A", 2], lambda x: isinstance(x, int))
2
This is equivalent to the ``itertools.quantify`` recipe, which I couldn't
get to work.
i i ( ( R R t retR ( ( s3 /usr/lib/python2.6/site-packages/webhelpers/misc.pyt
count_trueJ s
c C s) y | | SWn t j
o d SXd S( sę Return the value converted to the type, or None if error.
``type_`` may be a Python type or any function taking one argument.
>>> print convert_or_none("5", int)
5
>>> print convert_or_none("A", int)
None
N( t Exceptiont None( t valuet type_( ( s3 /usr/lib/python2.6/site-packages/webhelpers/misc.pyt convert_or_none] s t DeclarativeExceptionc B s e Z d Z d Z d d Z RS( sU A simpler way to define an exception with a fixed message.
Example:
>>> class MyException(DeclarativeException):
... message="can't frob the bar when foo is enabled"
...
>>> try:
... raise MyException()
... except Exception, e:
... print e
...
can't frob the bar when foo is enabled
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