记 suds 模块循环依赖的坑

下面是soa接口调用的核心代码

#! /usr/bin/python
# coding:utf-8
from suds.client import Clientdef SoaRequest(wsdl,fnname,data):
    soaService = Client(wsdl).service
    soaRep = getattr(soaService,fnname)(data)
    return soaRep

问题就这样出现了：

我调用一个接口，总是报错，见下图：

之后Debug断点定位到suds模块的sxbasic.py文件中的Import类的open方法

    def open(self, options):"""
        Open and import the refrenced schema.
        @param options: An options dictionary.
        @type options: L{options.Options}
        @return: The referenced schema.
        @rtype: L{Schema}
        """
        if self.opened:
            return
        self.opened = True
        log.debug(‘%s, importing ns="%s", location="%s"‘, self.id, self.ns[1], self.location)
        result = self.locate()

        if result is None:
            if self.location is None:
                log.debug(‘imported schema (%s) not-found‘, self.ns[1])
            else:
                result = self.download(options)
        log.debug(‘imported:\n%s‘, result)
        return result

self.location 为None时日志打印，否则就执行download而我测试的接口有个这种问题，A中依赖B，B中依赖C，C中依赖A，循环依赖所有就出问题了

好吧，那就改吧在类Import外定义数组变量resultList = []

    def open(self, options):
        global resultList#声明全局变量
        if self.opened:
            return
        self.opened = True
        log.debug(‘%s, importing ns="%s", location="%s"‘, self.id, self.ns[1], self.location)
        result = self.locate()

        if result is None:
            if self.location is None:
                log.debug(‘imported schema (%s) not-found‘, self.ns[1])
            else:
                if self.location in resultList:
                    log.debug(‘location is already in resultList‘) #list中存在，即说明已完成下载
                else:
                    result = self.download(options)
                    resultList.append(self.location)#下载完成后，往list中添加记录
        log.debug(‘imported:\n%s‘, result)
        return result

这样应该没问题了吧，运行，还是报同样的错

继续调试

。

发现resultList一直是空，就是说下载操作完成后添加记录的操作没有执行

于是我调换了下顺序

直接成功

   def open(self, options):
        global resultList
        if self.opened:
            return
        self.opened = True
        log.debug(‘%s, importing ns="%s", location="%s"‘, self.id, self.ns[1], self.location)
        result = self.locate()

        if result is None:
            if self.location is None:
                log.debug(‘imported schema (%s) not-found‘, self.ns[1])
            else:
                if self.location in resultList:
                    log.debug(‘location is already in resultList‘)
                else:
                    resultList.append(self.location)
                    result = self.download(options)
        log.debug(‘imported:\n%s‘, result)
        return result