obj[lower:] = expr

def STORE_SLICE_1(self, instr):
        'obj[lower:] = expr'
        lower = self.ast_stack.pop()
        value = self.ast_stack.pop()
        expr = self.ast_stack.pop()

        kw = dict(lineno=instr.lineno, col_offset=0)
        slice = _ast.Slice(lower=lower, step=None, upper=None, **kw)
        subscr = _ast.Subscript(value=value, slice=slice, ctx=_ast.Store(), **kw)

        assign = _ast.Assign(targets=[subscr], value=expr, **kw)
        self.ast_stack.append(assign)