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A collection of utility functions and classes. Many (but not all)
from the Python Cookbook -- hence the name cbook
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Base class for handling string -> python type with support for
missing values
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Handle registering and disconnecting for a set of signals and
callbacks::
signals = 'eat', 'drink', 'be merry'
def oneat(x):
print 'eat', x
def ondrink(x):
print 'drink', x
callbacks = CallbackRegistry(signals)
ideat = callbacks.connect('eat', oneat)
iddrink = callbacks.connect('drink', ondrink)
#tmp = callbacks.connect('drunk', ondrink) # this will raise a ValueError
callbacks.process('drink', 123) # will call oneat
callbacks.process('eat', 456) # will call ondrink
callbacks.process('be merry', 456) # nothing will be called
callbacks.disconnect(ideat) # disconnect oneat
callbacks.process('eat', 456) # nothing will be called
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register *func* to be called when a signal *s* is generated
func will be called
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disconnect the callback registered with callback id *cid*
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disconnect s c O s< | i | x( | i | i D] } | | | q! Wd S( s
process signal *s*. All of the functions registered to receive
callbacks on *s* will be called with *\*args* and *\*\*kwargs*
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Base class for timeout and idle scheduling
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c C s3 | i o d S| i i | i t | _ d S( N( R= R? R" t joint True( R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt stop s
( R R R R9 t Lockt idlelockR; R RB ( ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyR8 s
t Timeoutc B s e Z d Z d Z d Z RS( s?
Schedule recurring events with a wait time in seconds
c C s# t i | | | _ | | _ d S( N( R8 R t waitR, ( R RF R, ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyR s
c C sd x] | i i pL | i i | i t i i | i | } t i i | p Pq q Wd S( N( R? t isSetRF R8 RD t acquireR, t release( R t b( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt run s
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Schedule callbacks when scheduler is idle
g?c C s t i | | | _ d S( N( R8 R R, ( R R, ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyR s
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override repr when returning a list of matplotlib artists to
prevent long, meaningless output. This is meant to be used for a
homogeneous list of a give type
c C s+ | | _ | d j o | i | n d S( N( t typeR t extend( R RO t seq( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyR s
c C s d t | | i f S( Ns ( t lenRO ( R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt __repr__ s c C s d t | | i f S( Ns ( RR RO ( R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt __str__ s N( R R R R R RS RT ( ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyRN s c C s: d } | d d
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s% remove latex formatting from mathtexts \mathdefaults \rms \cals \tts \its \t {t }i iR ( s \mathdefaults \rms \cals \tts \its \RU RV ( t replace( R t removet r( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt
strip_math s
t Bunchc B s e Z d Z d Z d Z RS( s
Often we want to just collect a bunch of stuff together, naming each
item of the bunch; a dictionary's OK for that, but a small do- nothing
class is even handier, and prettier to use. Whenever you want to
group a few variables:
>>> point = Bunch(datum=2, squared=4, coord=12)
>>> point.datum
By: Alex Martelli
From: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308
c K s | i i | d S( N( t __dict__t update( R t kwds( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyR s c C sL | i i } d d i g } | D] } | d | | i | f q# ~ S( Ns Bunch(%s)s , s %s=%s( R\ t keysR@ ( R R_ R' t k( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyRS s ( R R R R RS ( ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyR[ s c C s1 t g } | D] } | | d f q ~ i S( s' Return a list of unique elements of *x*i ( R$ R_ ( t xR' t val( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt unique
s c C s y t | Wn t SXt S( s return true if *obj* is iterable( RR R< RA ( t obj( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt iterable s
c C sv t | t t f o t St i | o0 | i d j o | i i d j o t St Sn y | d Wn t SXt S( s( Return True if *obj* looks like a stringi t SUR (
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Returns true if *obj* is iterable and contains strings
( Re R< Rn RA ( Rd t o( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt is_sequence_of_strings% s
c C s t | d o
t | i S( sC return true if *obj* looks like a file object with a *write* methodt write( t hasattrt callableRq ( Rd ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt is_writable_file_like/ s c C s t | o t | S( s; return true if *obj* is not string like and is not iterable( Rn Re ( Rd ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt is_scalar3 s c C s+ y | d Wn t j
o t SXt Sd S( s( return true if *obj* looks like a numberi N( t TypeErrorR< RA ( Rd ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt
is_numlike7 s
t rUc C s t | o | i d o4 d d k } | i d d } | i | | } nT | i d o4 | i d d } d d k } | i | | } n t | | } t } n- t | d o | } t
} n
t d | o | | f S| S( s
*fname* can be a filename or a file handle. Support for gzipped
files is automatic, if the filename ends in .gz. *flag* is a
read/write flag for :func:`file`
s .gziNt UR s .bz2t seeks% fname must be a string or file handle( Rn t endswitht gzipRW t opent bz2t BZ2Filet fileRA Rr R< R* ( t fnamet flagt
return_openedR| t fhR~ t opened( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt
to_filehandle= s$
c C s t | p t | S( N( Rn Re ( Rb ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt is_scalar_or_stringZ s c c sJ xC | D]; } | | o | Vq x t | | D] } | Vq3 Wq Wd S( si
this generator flattens nested containers such as
>>> l=( ('John', 'Hunter'), (1,23), [[[[42,(5,23)]]]])
so that
>>> for i in flatten(l): print i,
John Hunter 1 23 42 5 23
By: Composite of Holger Krekel and Luther Blissett
From: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/121294
and Recipe 1.12 in cookbook
N( t flatten( RQ t scalarpt itemt subitem( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyR ] s
t Sorterc B s> e Z d Z d Z d d d Z d d Z e Z e Z RS( sf
Sort by attribute or item
Example usage::
sort = Sorter()
list = [(1, 2), (4, 8), (0, 3)]
dict = [{'a': 3, 'b': 4}, {'a': 5, 'b': 2}, {'a': 0, 'b': 0},
{'a': 9, 'b': 9}]
sort(list) # default sort
sort(list, 1) # sort by index 1
sort(dict, 'a') # sort a list of dicts by key 'a'
c C sK | i g } | D] \ } } | | | q ~ } | o | | (n | S( N( R) ( R t datat auxt inplaceR' t junkt it result( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt _helper s
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t Xlatorc B s) e Z d Z d Z d Z d Z RS( sm
All-in-one multiple-string-substitution class
Example usage::
text = "Larry Wall is the creator of Perl"
adict = {
"Larry Wall" : "Guido van Rossum",
"creator" : "Benevolent Dictator for Life",
"Perl" : "Python",
}
print multiple_replace(adict, text)
xlat = Xlator(adict)
print xlat.xlat(text)
c C s( t i d i t t i | i S( s= Build re object based on the keys of the current dictionary t |( t ret compileR@ t mapt escapeR_ ( R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt _make_regex s c C s | | i d S( s( Handler invoked for each regex *match* i ( t group( R t match( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyR
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s c C s d S( Ns Null()( ( R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyRT s c C s d S( Ns Null()( ( R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyRS s c C s d S( Ni ( ( R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt __nonzero__ s c C s | S( N( ( R R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt __getattr__ s c C s | S( N( ( R R t value( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt __setattr__ s c C s | S( N( ( R R ( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt __delattr__ s ( R R R R R
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make directory *newdir* recursively, and set *mode*. Equivalent to ::
> mkdir -p NEWDIR
> chmod MODE NEWDIR
i N( t ost patht existst splitR RR R@ t makedirst OSErrort errnot EEXISTt isdir( t newdirt modet partsR t thispartt err( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt mkdirs s 't GetRealpathAndStatc B s e Z d Z d Z RS( c C s
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c C sb d } xO t | t t | D]2 \ } } | t | d 7} | | j o | Sq" Wt | S( so
*seq* is a list of words. Return the index into seq such that::
len(' '.join(seq[:ind])<=N
i i ( t zipR RR ( RQ t Nt sLent wordt ind( ( s6 /usr/lib64/python2.6/site-packages/matplotlib/cbook.pyt
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This class provides a lightweight way to group arbitrary objects
together into disjoint sets when a full-blown graph data structure
would be overkill.
Objects can be joined using :meth:`join`, tested for connectedness
using :meth:`joined`, and all disjoint sets can be retreived by
using the object as an iterator.
The objects being joined must be hashable.
For example:
>>> g = grouper.Grouper()
>>> g.join('a', 'b')
>>> g.join('b', 'c')
>>> g.join('d', 'e')
>>> list(g)
[['a', 'b', 'c'], ['d', 'e']]
>>> g.joined('a', 'b')
True
>>> g.joined('a', 'c')
True
>>> g.joined('a', 'd')
False
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