**kwargs 与 python 函数中的 10 个参数？

发布于 2024-11-11 17:31:43 字数 1542 浏览 4 评论 0原文

我从 python 开始，尝试为 ebay 网络服务：

现在，我的问题是：

说，这是我的功能：

def findBestMatchItemDetailsAcrossStores():
     request = """<?xml version="1.0" encoding="utf-8"?>
     <findBestMatchItemDetailsAcrossStoresRequest xmlns="http://www.ebay.com/marketplace/search/v1/services">
     <siteResultsPerPage>50</siteResultsPerPage>
     <entriesPerPage>50</entriesPerPage>
     <ignoreFeatured>true</ignoreFeatured>
     <keywords>ipod</keywords> <-----REQUIRED
     <itemFilter>
     <paramName>PriceMin</paramName>
     <paramValue>50</paramValue>
     <name>Currency</name>
     <value>USD</value>
     </itemFilter>
     <itemFilter>
     <paramName>PriceMax</paramName>
     <paramValue>100</paramValue>
     </itemFilter>
     </findBestMatchItemDetailsAcrossStoresRequest>"""
     return get_response(findBestMatchItemDetailsAcrossStores.__name__, request)

其中，关键字是唯一必填字段。那么，我应该如何构造该方法呢？方法可以是：

创建一个对象，将其传递给 func(object) ：java 方式
传递所有参数： func(a=val1, b=val2, c=val3, d=val4 etc)
使用 **kwargs 和相信调用该函数的人，他会传递正确的键和值，因为我将使用这些键来实际构造 XML 标记。

更新：

您在请求中看到的所有 xml 标记都需要由用户传递。但是关键字应该被传递，并且如果需要也可以传递其他关键字。

有什么建议吗？

原文

I am starting out with python and trying to construct an XML request for an ebay web service:

Now, my question is:

Say, this is my function:

def findBestMatchItemDetailsAcrossStores():
     request = """<?xml version="1.0" encoding="utf-8"?>
     <findBestMatchItemDetailsAcrossStoresRequest xmlns="http://www.ebay.com/marketplace/search/v1/services">
     <siteResultsPerPage>50</siteResultsPerPage>
     <entriesPerPage>50</entriesPerPage>
     <ignoreFeatured>true</ignoreFeatured>
     <keywords>ipod</keywords> <-----REQUIRED
     <itemFilter>
     <paramName>PriceMin</paramName>
     <paramValue>50</paramValue>
     <name>Currency</name>
     <value>USD</value>
     </itemFilter>
     <itemFilter>
     <paramName>PriceMax</paramName>
     <paramValue>100</paramValue>
     </itemFilter>
     </findBestMatchItemDetailsAcrossStoresRequest>"""
     return get_response(findBestMatchItemDetailsAcrossStores.__name__, request)

Where, keyword is the only required field. So, how should I construct the method? The ways can be:

Create an object, pass it to the func(object) : The java way
Pass all the arguments: func(a=val1, b=val2, c=val3, d=val4 etc)
Use **kwargs and trust the person who calls the function, that he passes the right keys with the values, because I will use the keys to actually construct the XML tags.

Update:

All the xml tags you see in the request are needed to be passed by the user. But keywords should be passed and others maybe passed if required.

Any suggestions?

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倥絔 2024-11-18 17:31:43

一个好主意是将所有具有适当默认值（或仅 None 默认值）的参数放入函数签名中。是的，它需要在函数本身中进行更多的输入，但是界面将是干净的、自记录的并且易于使用，因为您不必在 eBay 文档或函数源中查找可能的参数。这将节省您以后的时间。

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只等公子 2024-11-18 17:31:43

将消息建模为一个类怎么样？

class FindBestMatchItemDetailsAcrossStoresRequest:
     def __init__(self,keywords):
         self.keywords = keywords # required parameters in the constructor
         # set up the default values....etc
         self.siteResultsPerPage = 50 
         self.name = 'Currency'


     def send(self):
         # build message from self.xxx
         return get_response()


 #usage
 req = FindBestMatchItemDetailsAcrossStoresRequest('ipod')
 response = req.send()

 #usage with optional args

 req.siteResultsPerPage = 150
 response = req.send()

how about modeling the message as a class?

class FindBestMatchItemDetailsAcrossStoresRequest:
     def __init__(self,keywords):
         self.keywords = keywords # required parameters in the constructor
         # set up the default values....etc
         self.siteResultsPerPage = 50 
         self.name = 'Currency'


     def send(self):
         # build message from self.xxx
         return get_response()


 #usage
 req = FindBestMatchItemDetailsAcrossStoresRequest('ipod')
 response = req.send()

 #usage with optional args

 req.siteResultsPerPage = 150
 response = req.send()

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