OSError for dir_archive for many-variable inputs

[mmckerns]

The defaults for a dir_archive where the input is a long array can fail because the file name is too long.

Traceback (most recent call last):
  File "/Users/mmckerns/lib/python3.8/site-packages/klepto/_archives.py", line 582, in _lookup
    with open(_file, mode) as f:
OSError: [Errno 63] File name too long: '/Users/mmckerns/testing/truth/K_(3.141592653589793, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586, 6.283185307179586)/output.pkl'

What can be done here? Is there a better default or should the mitigation plan be documentation?