问云函数与云函数之间如何互相调用？

def main_handler(event, context):
    print("prepare to invoke a function!")
    try:
        data = scf.invoke('FuncInvoked',  region="ap-guangzhou",data={"a":"b"})
        print (data)
    except TencentServerlessSDKException as e:
        print (e)
    except TencentCloudSDKException as e:
        print (e)
    except Exception as e:
        print (e)
    return "Already invoked a function!" # return

main_handler("","")