Re-write the initGroup() function of your program in the <A
HREF=ex12-showname-1.html#initgroup>previous exercise</A> so that it will read
Students' names from a text file, instead of hardwired these data in
your program.  With the new __str__() method, your program should be
smart enough to show all the students' names in a correct way.

<P> Test your class with the following main program:
<pre>
<code>
def main():
    fn = input("File name? ")
    group = initGroup(fn)
    for s in group:
        print(s)

main()
</code>
</pre>