parallel.py 文件源码

def generic_visit(self, node):
        super(NodeTransformer, self).generic_visit(node)
        if hasattr(node, 'body') and type(node.body) is list:
            returns = [i for i, child in enumerate(node.body) if type(child) is ast.Return]
            if len(returns) > 0:
                for wait in self.get_waits():
                    node.body.insert(returns[0], wait)
            inserts = []
            for i, child in enumerate(node.body):
                if type(child) is ast.Expr and self.is_concurrent_call(child.value):
                    self.encounter_call(child.value)
                elif self.is_valid_assignment(child):
                    call = child.value
                    self.encounter_call(call)
                    name = child.targets[0].value
                    self.arguments.add(SchedulerRewriter.top_level_name(name))
                    index = child.targets[0].slice.value
                    call.func = ast.Attribute(call.func, 'assign', ast.Load())
                    call.args = [ast.Tuple([name, index], ast.Load())] + call.args
                    node.body[i] = ast.Expr(call)
                elif self.references_arg(child):
                    inserts.insert(0, i)
            for index in inserts:
                for wait in self.get_waits():
                    node.body.insert(index, wait)