$42 GRAYBYTE WORDPRESS FILE MANAGER $70

�
��^c@sNdZd
�Z
d�Zddd��YZd�ZedkrJe�
ndS(	s
Example of a generator: re-implement the built-in range function
without actually constructing the list of values.

OldStyleRange is coded in the way required to work in a 'for' loop before
iterators were introduced into the language; using __getitem__ and __len__ .

c

Cs�y�t|�
d
kr,dt
|d�
d
fSt|�
dkr_t
|d�
t
|d
�
d
fSt|�
dkr�|ddkr�td�
�
ntd�|D�
�
Stdt|�
��
Wntk
r�


td�
�
n
Xd	S(
sgTake list of arguments and extract/create proper start, stop, and step
    values and return in a tuplei
iiisstep argument must not be zeroc
ss|]}
t|
�
V
qdS(
N(
tint(t.0t
x((s*/usr/lib64/python2.7/Demo/classes/Range.pys	<genexpr>ss$range() accepts 1-3 arguments, givensArange() arguments must be numbers or strings representing numbersN(tlenRt
ValueErrorttuplet	TypeError(
targlist((s*/usr/lib64/python2.7/Demo/classes/Range.pyt
handleargss



!






cgsAt|�
\}
}}|
}x||kr<|V
||7}qWd
S(s,Function to implement 'range' as a generatorN(
R(t
atstarttstoptsteptvalue((s*/usr/lib64/python2.7/Demo/classes/Range.pytgenranges




toldrangec
Bs2eZ
dZd
�Zd�Zd�Zd�ZRS(s
Class implementing a range object.
    To the user the instances feel like immutable sequences
    (and you can't concatenate or slice them)

    Done using the old way (pre-iterators; __len__ and __getitem__) to have an
    object be used by a 'for' loop.

    c
GsEt|
�
\|_
|_|_td
|j|j
|j�|_dS(s� Initialize start, stop, and step values along with calculating the
        nubmer of values (what __len__ will return) in the rangeiN(RR
RRtmaxR(tselfR	((s*/usr/lib64/python2.7/Demo/classes/Range.pyt__init__,s
c

Csd
|j|j
|jfS(s-implement repr(x) which is also used by printsrange(%r, %r, %r)(R
RR(
R((s*/usr/lib64/python2.7/Demo/classes/Range.pyt__repr__2sc


Cs|jS(
simplement len(x)(
R(
R((s*/usr/lib64/python2.7/Demo/classes/Range.pyt__len__6scCs>d
|
k
o|jk
n
r1|j
|j|
Std�dS(simplement x[i]isrange[i] index out of rangeN(RR
Rt
IndexError(Rt
i((s*/usr/lib64/python2.7/Demo/classes/Range.pyt__getitem__:s
(t__name__t
__module__t__doc__RRRR(((s*/usr/lib64/python2.7/Demo/classes/Range.pyR"s
			c
Cs9
d
dl}d
dl
}
|
jddd�}ttddd��
}ttddd��
}||ksu||kr�td|||f�
�
ndGH|j�}xtd�
D]}q�W|j�}xtd�
D]}q�W|j�}x|
jd�
D]}q�W|j�}	||GdGH||Gd	GH|	|Gd
GHdS(Ni����iidisEerror in implementation:
correct   = %s
old-style = %s
generator = %ssTimings for range(1000):i�ssec (old-style class)ssec (generator)ssec (built-in)(ttimet__builtin__trangetlistRRt	Exception(
RRtcorrect_resulttoldrange_resulttgenrange_resulttt1Rtt2tt3tt4((s*/usr/lib64/python2.7/Demo/classes/Range.pyttestBs*




















t__main__N((RRRRR'R(((s*/usr/lib64/python2.7/Demo/classes/Range.pyt<module>s