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zcsnbb
V2EX  ›  Python

Python 中怎么把字典的一对键值作为参数传到函数里啊==

  •  
  •   zcsnbb · Sep 18, 2018 · 4532 views
    This topic created in 2782 days ago, the information mentioned may be changed or developed.

    class Order ( object ): def Order_new(self, **kwargs): self.client.Order.Order_new(这里).result() 怎么把 kwargs 拿到的字典的每一对键值 传到 order_new()中啊 key=value 这种

    6 replies    2018-09-19 07:00:34 +08:00
    windfarer
        1
    windfarer  
       Sep 18, 2018
    就写**kwargs
    zcsnbb
        2
    zcsnbb  
    OP
       Sep 18, 2018
    比如我调用函数时是
    order = Order ()
    order.Order_new(a=2, b=2)
    他会提醒没有 a 这个参数
    但是如果直接写到上面的方法中 就没有问题
    zcsnbb
        3
    zcsnbb  
    OP
       Sep 18, 2018
    class Bitmex(object):

    def Order_new(self, ordType, side, symbol, orderQty, price):

    self.client.Order.Order_new(ordType=ordType, side=side, symbol=symbol, orderQty=orderQty, price=price).result()


    这样的话 传的是没问题的,可是 我要传的值 个数不确定,然后使用**kwargs,有上面的问题
    trueGate
        4
    trueGate  
       Sep 18, 2018
    定义:
    kv={'k-a':'v-a'}

    def fun(**kwargs):
    fun-a = kwargs.get('k-a','default')
    # 'default'是 get 失败时的赋值

    调用:
    fun(**kv)
    zcsnbb
        5
    zcsnbb  
    OP
       Sep 18, 2018
    感谢各位,我参数写错了==
    PythonAnswer
        6
    PythonAnswer  
       Sep 19, 2018 via iPhone
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