class needs to refer a different class

[Skaperen]

so you want to see code. this is big, so i am not going to post it here. instead, you get a link:
http://ipal.net/python/zopen.py [502 lines. 23122 bytes]
this code is not finished but it is working. here is a script that uses it:
http://ipal.net/python/zhash.py [131 lines, 5532 bytes]
and here is a generator that zhash uses.
http://ipal.net/python/ftrgen.py [59 lines, 2074 bytes]
sha256 is:

Output:
lt2a/forums /home/forums 19> zhash sha256 {ftrgen,zhash,zopen}.py
55f48a8f19d3d84daf54f90b3764ca13a7c2b24abfd8e6c63f5fe8f198719d2c *ftrgen.py
2d00f29d37a11f86c4d84b515cfe07f7e44df44d0833e81cb8ddf13544eb7662 *zhash.py
b24200d214f211b2357aadbb6cf15c5564ea2b0ef70ac649e0b5e498c1fd1f18 *zopen.py
lt2a/forums /home/forums 20>