Set default value of "encoding" parameter of LCSV2RDF to 'utf-8'

lcsv.py

@@ -38,7 +38,7 @@ class LCSV2RDF(object):
     reference : W3C unofficial draft, http://jenit.github.io/linked-csv/
     """
 
-    def __init__(self, stream, delimiter, encoding,
+    def __init__(self, stream, delimiter, encoding='utf-8',
                  uri_generator=None, uri_cls=text_type, default_lang=None):
         """ check stream validity and init attribute"""
         self.source_file = ucsvreader(stream, encoding=encoding, delimiter=delimiter)

sobjects.py

@@ -156,7 +156,7 @@ class SKOSParser(datafeed.DataFeedParser):
                                        source=self.source, raise_on_error=raise_on_error, **kwargs)
 
 
-def lcsv_extentities(stream, scheme_uri, delimiter, encoding, language_code=None):
+def lcsv_extentities(stream, scheme_uri, delimiter, encoding='utf-8', language_code=None):
     """Return external entities generator from SKOS LCSV stream or URL (by transforming it to RDF
     first).
 
@@ -171,7 +171,7 @@ def lcsv_extentities(stream, scheme_uri, delimiter, encoding, language_code=None
     """
     graph = rdfio.RDFLibRDFGraph()
     # add LCSV statements to the RDF graph
-    lcsv2rdf = lcsv.LCSV2RDF(stream, delimiter, encoding, default_lang=language_code,
+    lcsv2rdf = lcsv.LCSV2RDF(stream, delimiter, encoding=encoding, default_lang=language_code,
                              uri_cls=graph.uri, uri_generator=lambda x: str(uuid4()) + x)
     for (subj, pred, obj) in lcsv2rdf.triples():
         graph.add(subj, pred, obj)