pyexcel-xls==0.4.1 is broken

[chfw]

lml.utils: ERROR: Failed to import pyexcel_xls.xlsr
671Traceback (most recent call last):
672 File "/home/travis/virtualenv/python3.6.7/lib/python3.6/site-packages/lml/utils.py", line 59, in do_import_class
673 plugin_module = import(plugin_module_name)
674 File "/home/travis/virtualenv/python3.6.7/lib/python3.6/site-packages/pyexcel_xls/xlsr.py", line 17, in
675 from pyexcel_io._compact import OrderedDict, PY2
676ImportError: cannot import name 'PY2'