Found keyword SYMBOL, which has not special parsing for now

[Shareef Dabdoub]

This is likely similar to #182

Looking up any KO identifier returns the message in the title. I've included below a simple example:

from bioservices import KEGG
k = KEGG(verbose=False)
k.parse(k.get('ko:K00001'))

[Thomas Cokelaer]

Should be fixed in version 1.8.3 to be posted on pypi soon