Question

我知道这是可怕的编码。只是试图找出为什么我一直收到这个错误信息......

问题：什么时候没有提供脚本文件;为什么它会返回下面的错误而不是except块？否则，如果我在运行它时提供xml文件，脚本就可以工作。

回溯（最近一次呼叫最后）：文件＆＃34; C：\ bin \ read.py＆＃34;，第5行，在 script，filename = argv ValueError：需要多于1个值才能解压缩

import sys
from xml.dom import minidom
from sys import argv

script, filename = argv

xmldoc = minidom.parse(filename)
total = len(sys.argv)
spacenumber = 1
space = "\t" * spacenumber

betweenspace = "\t" * 2

# ROOT ELEMENT <clusterConfig></clusterConfig>
rootElement = xmldoc.getElementsByTagName('clusterConfig')[0]

# CHILD ELEMENT 1 <instanceConfiguration></instanceConfiguration>
#childElement1s = rootElement.getElementsByTagName('instanceConfiguration')[0]
instanceRaters      = rootElement.getElementsByTagName('instanceConfiguration')[0]
instanceUpdaters    = rootElement.getElementsByTagName('instanceConfiguration')[1]
instanceGuiders     = rootElement.getElementsByTagName('instanceConfiguration')[2]
instanceBulkLoaders = rootElement.getElementsByTagName('instanceConfiguration')[3]
instanceTaxers      = rootElement.getElementsByTagName('instanceConfiguration')[4]
instanceDispatchers = rootElement.getElementsByTagName('instanceConfiguration')[5]

# CHILD ELEMENT 2 <configParameter />
#childElement2s = childElement1s.getElementsByTagName('configParameter')
raterAttributes      = instanceRaters.getElementsByTagName('configParameter')
updaterAttributes    = instanceUpdaters.getElementsByTagName('configParameter')
guiderAttributes     = instanceGuiders.getElementsByTagName('configParameter')
bulkLoaderAttributes = instanceBulkLoaders.getElementsByTagName('configParameter')
taxerAttributes      = instanceTaxers.getElementsByTagName('configParameter')
dispatcherAttributes = instanceDispatchers.getElementsByTagName('configParameter')

def runthis():
    # Print rater configuration
    print "RATER CONFIGURATION:\n"
    for raterAttribute in raterAttributes:
        print ("%s%s%s%s" %(space,raterAttribute.getAttribute('name'), betweenspace, raterAttribute.getAttribute('value')))
    # Print updater configuration
    print "\n\nUPDATER CONFIGURATION:\n"
    for updaterAttribute in updaterAttributes:
        print ("%s%s%s%s" %(space,updaterAttribute.getAttribute('name'), betweenspace, updaterAttribute.getAttribute('value')))
    # Print guider configuration
    print "\n\nGUIDER CONFIGURATION:\n"
    for guiderAttribute in guiderAttributes:
        print ("%s%s%s%s" %(space,guiderAttribute.getAttribute('name'), betweenspace, guiderAttribute.getAttribute('value')))
    # Print bulkLoader configuration
    print "\n\nBULKLOADER CONFIGURATION:\n"
    for bulkLoaderAttribute in bulkLoaderAttributes:
        print ("%s%s%s%s" %(space,bulkLoaderAttribute.getAttribute('name'), betweenspace, bulkLoaderAttribute.getAttribute('value')))
    # Print taxer configuration
    print "\n\nTAXER CONFIGURATION:\n"
    for taxerAttribute in taxerAttributes:
        print ("%s%s%s%s" %(space,taxerAttribute.getAttribute('name'), betweenspace, taxerAttribute.getAttribute('value')))
    # Print dispatcher configuration
    print "\n\nDISPATCHER CONFIGURATION:\n"
    for dispatcherAttribute in dispatcherAttributes:
        print ("%s%s%s%s" %(space,dispatcherAttribute.getAttribute('name'), betweenspace, dispatcherAttribute.getAttribute('value')))

try:
    runthis()
except ValueError:
    print "ERROR!!!! YOU FORGOT TO INCLUDE THE PARAMETERS.XML FILE!"

Answer 1

根据我的理解，当你未能将足够的参数传递给ValueError: need more than 1 value to unpack（参数变量）时，似乎会出现argv。

例如，如果您通过命令行终端调用脚本，则需要键python script.py filename。（其中script.py是脚本名称，filename是您要分配给变量filename的文件。）

如果只输入python script.py，则会返回您描述的ValueError。这是因为通过使用argv，您需要在调用脚本时输入变量。

希望这有帮助，请询问是否不清楚/这是否解决问题。

错误没有argv的值

1 个答案: