Hello,
I'm writing a kind of language simulation. Here, an expression like "a#3.b"
maps to a NamedData node, with an attribute terms=[('.','a'),('#',3),('.'''b')].
(The lang uses '#' instead of "[...]" for item indexing.)
When this node is "run", the source code maps to a name lookup operation in
current scope, passing the terms attr as argument. Below the code with debug
prints and the error I get and cannot understand:
==================
class Scope(Code):
...
@staticmethod
def lookup(scope, terms):
''' actual data refered to by name (or context) terms'''
data = scope # actually, initial container
for term in terms:
(sign,key) = term
print data, (sign,ATTR,sign==ATTR,sign is ATTR), key
if sign == "ATTR": # sign == ATTR='.'
print "getAttr"
data = data.getAttr(key)
else: # sign == ITEM='#'
print "getItem"
data = data.getItem(key) ####### line 82 #######
return data
=== output =======
currentScope ('.', '.', True, True) a
getItem
... traceback ...
File "/home/spir/prog/python/claro/scope.py", line 82, in lookup
data = data.getItem(key)
AttributeError: 'Scope' object has no attribute 'getItem'
==================
(Scopes actually have no getIem, they're plain symbol (attribute) containers.)
There must be something such obvious I'm too stupid to see it! What do I
overlook? How can it branch to the "getItem" side of the choice?
Denis
________________________________
vit esse estrany ☣
spir.wikidot.com
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