U {h@s8dZdgZGdddZGdddZGdddZdS)a Helper for looping over sequences, particular in templates. Often in a loop in a template it's handy to know what's next up, previously up, if this is the first or last item in the sequence, etc. These can be awkward to manage in a normal Python loop, but using the looper you can get a better sense of the context. Use like:: >>> for loop, item in looper(['a', 'b', 'c']): ... print loop.number, item ... if not loop.last: ... print '---' 1 a --- 2 b --- 3 c looperc@s(eZdZdZddZddZddZdS) rz Helper for looping (particularly in templates) Use this like:: for loop, item in looper(seq): if loop.first: ... cCs ||_dSN)seqselfrr:/tmp/pip-unpacked-wheel-fhl22ezh/Cython/Tempita/_looper.py__init__#szlooper.__init__cCs t|jSr) looper_iterrrrrr__iter__&szlooper.__iter__cCsd|jj|jfS)Nz <%s for %r>) __class____name__rr rrr__repr__)szlooper.__repr__N)r __module__ __qualname____doc__rr rrrrrrs c@s$eZdZddZddZddZdS)r cCst||_d|_dSN)listrposrrrrr0s zlooper_iter.__init__cCs|Srrr rrrr 4szlooper_iter.__iter__cCs@|jt|jkrtt|j|j|j|jf}|jd7_|SN)rlenr StopIterationloop_pos)rresultrrr__next__7s zlooper_iter.__next__N)r rrrr rrrrrr .sr c@seZdZddZddZddZeeZddZeeZd d ZeeZd d Z ee Z d dZ ee Z ddZ ee Z ddZ ee Z ddZ ee Z ddZeeZddZeeZd ddZd!ddZddZdS)"rcCs||_||_dSrrr)rrrrrrrAszloop_pos.__init__cCsd|j|j|jfS)Nzrr rrrrEs zloop_pos.__repr__cCs|jSrrr rrrindexIszloop_pos.indexcCs |jdSrrr rrrnumberMszloop_pos.numbercCs |j|jSrrr rrritemQsz loop_pos.itemcCs.z|j|jdWStk r(YdSXdSr)rr IndexErrorr rrrrUszloop_pos.__next__cCs|jdkrdS|j|jdS)Nrr)rrr rrrprevious\s zloop_pos.previouscCs |jd SNrr rrroddbsz loop_pos.oddcCs |jdSr$rr rrrevenfsz loop_pos.evencCs |jdkSrrr rrrfirstjszloop_pos.firstcCs|jt|jdkSr)rrrr rrrlastnsz loop_pos.lastcCs t|jSr)rrr rrrlengthrszloop_pos.lengthNcCs|jr dS||j|j|S)a Returns true if this item is the start of a new group, where groups mean that some attribute has changed. The getter can be None (the item itself changes), an attribute name like ``'.attr'``, a function, or a dict key or list index. T)r(_compare_groupr!r#rgetterrrr first_groupvszloop_pos.first_groupcCs|jr dS||j|j|S)a Returns true if this item is the end of a new group, where groups mean that some attribute has changed. The getter can be None (the item itself changes), an attribute name like ``'.attr'``, a function, or a dict key or list index. T)r)r+r!rr,rrr last_groupszloop_pos.last_groupcCs|dkr||kSt|trt|drt|dd}|dr^|dd}t||t||kSt||t||kSn*t|dr||||kS||||kSdS)N.rz()__call__) isinstancestr startswithendswithgetattrhasattr)rr!otherr-rrrr+s     zloop_pos._compare_group)N)N)r rrrrrpropertyr r!rr#r&r'r(r)r*r.r/r+rrrrr?s2 rN)r__all__rr rrrrrs