我使用fabric，但很多都是with，所以我想使用python'；让decorator使代码变得更好

基本python代码：

for host in hosts:
    with settings(
                  host=host,
                  user=user,
                  password=passwd,`enter code here`
                  )：
       run('uname -a')

def take_with_out(host, user, password):
with settings(
              host=host,
              user=user,
              password=passwd):
    def dec(fn):
        def wrapper(*argv, **kwgs):
            fn(*argv, **kwgs)
        return wrapper
    return dec

@take_with_out(host, user, password)
def foo(command):
    run(command)

foo("uname -a")

我想改变如下：

for host in hosts:
    with settings(
                  host=host,
                  user=user,
                  password=passwd,`enter code here`
                  )：
       run('uname -a')

def take_with_out(host, user, password):
with settings(
              host=host,
              user=user,
              password=passwd):
    def dec(fn):
        def wrapper(*argv, **kwgs):
            fn(*argv, **kwgs)
        return wrapper
    return dec

@take_with_out(host, user, password)
def foo(command):
    run(command)

foo("uname -a")

错误消息是指示我键入主机，以确保fabrice到ssh主机，而基本代码不要求我输入主机，但更改后的代码应该这样做

请尝试以下代码：

class add_context(object):
    def __init__(self, host, user, password):
        self.host = host
        self.user = user
        self.password = password

    def __call__(self, function):
        def wrapped_function(*args,**kwargs):
            with settings(host=self.host, user=self.user, password=self.password):
                return function(*args, **kwargs)
        return wrapped_function 

@add_context("localhost","unknow","password")
def foo(command):
    run(command)

foo("uname -a")