关闭文件错误的I/O操作

Question

所以我正在编写这个程序,它使用open()创建读取文件.当我尝试运行程序时给出了错误:ValueError:关闭文件的I/O操作(第18行).

在我在这个主题上看到的每个问题中,问题总是与缩进有关.IE尝试操作未在同一循环中打开的文件.我的蟒蛇有点生疏,但缩进对我来说很好看.

我希望有人可以快速查看,让我知道缩进是否错误,或者如果其他东西可能导致错误？代码(注释错误):

sourceFile = 'test.html'
serviceTarget = "Plumbers & HVAC Experts"
cityTarget = "NJ"

services = {"Plumbers", "Air Conditioning Experts", "Drain Cleaning Experts"}
cities = {"Westfield", "Scotch Plains", "Clark"}

serviceNames = {"Plumbers":"plumbers", "Air Conditioning Experts":"ac", "Drain Cleaning Experts":"drain"}
totalPages = len(services)*len(cities)

for serviceRep in services:
    for cityRep in cities:
        outFileName = cityRep + " " + serviceNames[serviceRep] + ".html"
        outFileName = outFileName.replace(" ", "_");
        print("Writing " + outFileName + "...")
        infile = open(sourceFile)
        outfile = open(outFileName, 'w')
        for line in infile:   #This is the line giving me problems
            if serviceTarget in line:
                line = line.replace(serviceTarget,serviceRep)
            if cityTarget in line:
                line = line.replace(cityTarget,cityRep)
            outfile.write(line)
            infile.close()
            outfile.close()
        totalPages -= 1; 
        print("DONE -- " + str(totalPages) + " left to go")

Answer 1

它看起来像一个缩进问题:你真的是那个infile.close()并且outfile.close()属于for line in infile:循环吗？