Traceback (most recent call last):


 "/usr/lib/python3.5/inspect.py", line 1088, in getfullargspec

sigcls=Signature)


 "/usr/lib/python3.5/inspect.py", line 2227, in _signature_from_callable

return _signature_from_function(sigcls, obj)


 "/usr/lib/python3.5/inspect.py", line 2103, in _signature_from_function

kind=_POSITIONAL_OR_KEYWORD))


 "/usr/lib/python3.5/inspect.py", line 2421, in __init__

raise ValueError('{!r} is not a valid parameter name'.format(name))
ValueError: '.0' is not a valid parameter name

Traceback (most recent call last):


 "site-packages/calibre/utils/formatter.py", line 377, in safe_format


 "site-packages/calibre/utils/formatter.py", line 342, in evaluate


 "site-packages/calibre/utils/formatter.py", line 266, in _eval_program


 "site-packages/calibre/utils/formatter.py", line 108, in program


 "site-packages/calibre/utils/formatter.py", line 115, in statement


 "site-packages/calibre/utils/formatter.py", line 159, in expr


 "site-packages/calibre/utils/formatter.py", line 115, in statement


 "site-packages/calibre/utils/formatter.py", line 159, in expr


 "site-packages/calibre/utils/formatter.py", line 115, in statement


 "site-packages/calibre/utils/formatter.py", line 159, in expr


 "site-packages/calibre/utils/formatter.py", line 115, in statement


 "site-packages/calibre/utils/formatter.py", line 171, in expr


 "site-packages/calibre/utils/formatter_functions.py", line 134, in eval_


 "site-packages/calibre/utils/formatter_functions.py", line 361, in evaluate


 "site-packages/calibre/ebooks/metadata/book/formatter.py", line 31, in get_value
ValueError: Value: unknown field #kobo
