debugging_list_comp.txt

Python Development Environment (Python IDE plugin for Eclipse). Features editor, code completion, re

Testing with compiler module (python 2.4.2)

FIRST

>>> compiler.parse('''DAYS = dict((day, index) for index, daysRep in enumeratedDays for day in daysRep)''')

Module(None, Stmt([Assign([AssName('DAYS', 'OP_ASSIGN')], CallFunc(Name('dict'), 
[GenExpr(GenExprInner(Tuple([Name('day'), Name('index')]), 
[GenExprFor(AssTuple([AssName('index', 'OP_ASSIGN'), AssName('daysRep', 'OP_ASSIGN')]), 
Name('enumeratedDays'), []), GenExprFor(AssName('day', 'OP_ASSIGN'), Name('daysRep'), [])]))], None, None))]))

SECOND

>>> compiler.parse('''DAYS = dict((day, index) for index, daysRep in (enumeratedDays for day in daysRep))''')

Module(None, Stmt([Assign([AssName('DAYS', 'OP_ASSIGN')], CallFunc(Name('dict'), 
[GenExpr(GenExprInner(Tuple([Name('day'), Name('index')]), 
[GenExprFor(AssTuple([AssName('index', 'OP_ASSIGN'), AssName('daysRep', 'OP_ASSIGN')]), 

GenExpr(GenExprInner( <<-- that's the difference

Name('enumeratedDays'), [GenExprFor(AssName('day','OP_ASSIGN'), Name('daysRep'), [])])), [])]))], None, None))]))


#... pydev grammar interpretation of facts...

#dict((day, index) for index, daysRep in enumeratedDays for day in daysRep)
	Call[
		func=Name[id=dict, ctx=Load], 
		args=[ListComp[
			elt=ListComp[
			
				elt=Tuple[elts=[Name[id=day, ctx=Load], Name[id=index, ctx=Load]], ctx=Load], 
				generators=[Comprehension[
					target=Tuple[elts=[Name[id=index, ctx=Store], Name[id=daysRep, ctx=Store]], ctx=Store], 
					iter=Name[id=enumeratedDays, ctx=Load], ifs=[]]]], 
				
			generators=[Comprehension[
				target=Name[id=day, ctx=Store], 
				iter=Name[id=daysRep, ctx=Load], ifs=[]]]]], keywords=[], starargs=null, kwargs=null]]]]



#dict((day, index) for index, daysRep in (enumeratedDays for day in daysRep))
	Call[
		func=Name[id=dict, ctx=Load], 
		args=[ListComp[
				elt=Tuple[elts=[Name[id=day, ctx=Load], Name[id=index, ctx=Load]], ctx=Load], 
				generators=[Comprehension[
					target=Tuple[elts=[Name[id=index, ctx=Store], Name[id=daysRep, ctx=Store]], ctx=Store], 
					iter=ListComp[
						elt=Name[id=enumeratedDays, ctx=Load], 
						generators=[Comprehension[
							target=Name[id=day, ctx=Store], 
							iter=Name[id=daysRep, ctx=Load], ifs=[]]]], ifs=[]]]]], keywords=[], starargs=null, kwargs=null]]]]