def Slice(self, node):
# Slice(start, stop, step){id(node), 'get'|'set'}
array, start, stop, step = node.operands
if start:
start = self.visit(start)
if stop:
stop = self.visit(stop)
if step:
step = self.visit(step)
return aappl(
aterm("Slice"), [self.visit(array), start or aterm("None"), stop or aterm("None"), step or aterm("None")]
)
def Literal(self, node):
if node.vtype == int:
return aint(node.val)
if node.vtype == float:
return areal(node.val)
else:
return aterm(node.val)
def annotate_dshape(ds):
"""
Convert a datashape instance into Aterm annotation
>>> ds = dshape('2, 2, int32')
>>> anno = dshape_anno(ds)
dshape("2, 2, int32")
>>> type(anno)
<class 'AAppl'>
"""
assert isinstance(ds, DataShape)
return aappl(aterm("dshape"), [astr(str(ds))])
def Assign(self, node):
return aappl(aterm("Assign"), self.visit(node.operands))
def IndexNode(self, node):
return aappl(aterm("Index"), self.visit(node.operands))
def Indexable(self, node):
self.operands.append(node)
return aappl(aterm("Array"), [])
def Op(self, node):
opname = node.__class__.__name__
return aappl(aterm(opname), self.visit(node.children))