Python trouble exiting a 'while' loop for simple script
===

I wrote a script to reformat a tab-delimited matrix (with header) into a "long format".  See example below.  It performs the task correctly but it seems to get stuck in an endless loop...  

Example of input:


    WHO   THING1    THING2
    me    me1       me2
    you   you1      you2

Desired output:

    me    THING1    me1
    me    THING2    me2
    you   THING1    you1
    you   THING2    you2
Here is the code:
 
    import csv
    matrix_file = open('path')
    matrix_reader = csv.reader(matrix_file, delimiter="\t")


    j = 1
    while j:
        matrix_file.seek(0)
        rownum = 0
        for i in matrix_reader:
            rownum+=1
            if j == int(len(i)):
                j = False
            elif rownum ==1:
                header = i[j]
            else:
               print i[0], "\t",header, "\t",i[j]
    j +=1

I think it has to do with my exit command (j = False). Any ideas? 
