i don't understand this exception

[Skaperen]

zopen() is calling open() in this case. no compression is involved. so, zopen must be mangling it, somehow. i replaced the comprehension loop (iterating the file object) with a single read() (intending to do .split('\n') but did not do that, yet) and that worked. i will try other forms of iteration, next. there are attached methods near the end of file zopen.py