user_data

@property
def user_data(self)

import dataflow as df
graph = df.FlowGraph(...)
user_data_str = "UserData123"
result = graph.fetch_data() # 异步取结果
flowinfo = result[1]
fetch_user_data = flowinfo.user_data[0:len(user_data_str)]
name = fetch_user_data.decode('utf-8')
print(name)