Python2.7避免循环导入
我有两个文件:Python2.7避免循环导入,python,Python,我有两个文件:Server.py和DBManger.py 我通过启动server.py来启动项目,在get\u answer函数中的客户端请求下,我调用DBManager类中的Login函数。 如果登录被批准,我想调用静态add\u online\u user功能。 现在,当我尝试执行此操作时,会出现此错误: Traceback (most recent call last): File "K:/Python/Spotify/Server/Server.py", line 6, in <
Server.py
和DBManger.py
我通过启动
server.py
来启动项目,在get\u answer
函数中的客户端请求下,我调用DBManager
类中的Login
函数。如果登录被批准,我想调用静态
add\u online\u user
功能。现在,当我尝试执行此操作时,会出现此错误:
Traceback (most recent call last):
File "K:/Python/Spotify/Server/Server.py", line 6, in <module>
import DBManager
File "K:\Python\Spotify\Server\DBManager.py", line 4, in <module>
import Server
File "K:\Python\Spotify\Server\Server.py", line 156, in <module>
db = DBManager.DataManager()
AttributeError: 'module' object has no attribute 'DataManager'
DBManager.py
code:
问题:
如何避免这种循环导入?似乎我无法单独解决此问题…为什么需要将DataManager导入服务器。py?server.py正在初始化DataManager并创建其实例,以便连接到服务器的客户端可以请求数据库的输入,您可以在
get\u answer
功能中看到此操作
import DBManager
def get_answer(data, sock):
global db, online_users
actions = {"LG": lambda *x: db.login(sock, *x),
}
param = json.loads(data[3:])
param = [str(x) if type(x) == unicode else x for x in param]
return json.dumps(actions[data[:2]](*param))
@staticmethod
def add_online_user(socket, username):
global online_users
if socket not in online_users:
online_users.update({socket: username})
print str(socket.getsockname()) + "is now login as: " + username
db = DBManager.DataManager()
import Server
class DataManager:
def login(self, sock, username, password):
# doing someting...
if approved:
Server.add_online_user(sock, username)
return True
return False