A question on the creation of list of lists

[subhabrata.banerji at gmail.com]

Dear Group,

I am trying to open a bunch of files from a directory and trying to put the results in list of lists that is to say,

that is to say, 
I have a list of file names of a directory, I want to read each one of them. 
After reading each one of them, I want to put the results of each file in a list. 
These lists would again be inserted to create a list of lists.

to do this I am trying to write it as follows:

list_of_files = glob.glob('C:\Python27\*.*')
    print list_of_files
    list1=[]
    list2=[]
    list_N=[list1,list2]
    for i,j in zip(list_of_files,list_N):
        print i,j
        x1=open(i,"r").read()
        x2=j.append(x1)
    all_sent=list_N
    print all_sent

Am I doing anything wrong? If any one may kindly suggest?
Is there any smarter way to do it? I am using Python2.7+
on MS-Windows 7 Professional Edition. 
Apology for any indentation error. 

Regards,
Subhabrata Banerjee.