以列表作为维度之一的多维列表

Question

我将浏览许多包含相同源代码的类似makefile。我试图找出一个特定的源文件存在于多少个项目中。 我想要的是：
foo.c 4[项目、项目、项目、项目]
钢筋混凝土1[projC]
似乎我需要为每个makefile创建一个新的lstof项目，我所做的就是删除它。 我试过很多其他的方法 元组可以有一个列表作为它的元素之一吗？你知道吗

for file in listOf Makefiles
for line in Makeifle
find code file (.c or .h)


    try:
        index = lstFilenames.index(strFilename)     # to determine if I have seen this file name yet
        #  Yes the file name is already in list
        lstOfFile = lstProjectNames[index]          # get list of projects that this file is seen in
        try:
            fileIndex = lstOfFile.index(myProject)  # check to see if the project is in the project list
        except:  # project not in list
            lstCount[index] +1                      # add one to count - I am counting the number of projects this file appears
            lstOfProjects.append(myProject)         # append the new project to list
    except:   # file name not found in list
            lstFilenames.append (strFilename)       #  put file in file name list 
            lstCount.append(1)                      # set count to one 
            lstOfProjects.append(myProject)         # add project name to project list

#************************************************************************** End of makefile  
lstProjectNames.append(lstOfProjects)  # add  project list to this list ( this list in indexed with teh file names and the counts)
del lstOfProjects[:]

Answer 1

你的del lstOfProjects[:]行是罪魁祸首，因为你的lstProjectNames持有一个reference到你的lstOfProjects，一旦你删除了它的内容，它就会在lstProjectNames中被删除