supporting both str and bytes on write file

[Skaperen]

You can easily create one by wrapping a file opened in mode 'wb' in your own class. Just overload the write() method.

so, basically, i just create my own file-like class to do what i need. if i included read methods, i would need to add a means to specify which type the caller wants returned (such as an arg given at read or open time, or distinct method names).