installation: deprecation warning caused by rdflib · Issue #2077 · inveniosoftware/invenio (original) (raw)
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Description
rdflib
causes deprecation warnings because of use of operator <<
which is deprecated in pyparsing
since version 2.0.1:
pyparsing.py:3546: DeprecationWarning: Operator '<<' is deprecated, use '<<=' instead
ret << Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )
Solution would be to downgrade pyparsing
to 2.0.0 (which breaks some existing code) or patch rdflib
.