docs: remove Unicode literals from docstrings (#2604)

Unicode literals (`u'ẋẏż'`) are redundant in Python 3 as all strings
support Unicode. This change eliminates the use of Unicode literals from
docstrings so that the `ALLOW_UNICODE` option flag is no longer needed
for doctests.

See also:
- #2383
- #2378

rdflib/collection.py

@@ -37,9 +37,9 @@ class Collection:
     <Graph identifier=... (<class 'rdflib.graph.Graph'>)>
     >>> c = Collection(g,listname)
     >>> pprint([term.n3() for term in c])
-    [u'"1"^^<http://www.w3.org/2001/XMLSchema#integer>',
-     u'"2"^^<http://www.w3.org/2001/XMLSchema#integer>',
-     u'"3"^^<http://www.w3.org/2001/XMLSchema#integer>']
+    ['"1"^^<http://www.w3.org/2001/XMLSchema#integer>',
+     '"2"^^<http://www.w3.org/2001/XMLSchema#integer>',
+     '"3"^^<http://www.w3.org/2001/XMLSchema#integer>']
 
     >>> Literal(1) in c
     True

rdflib/extras/describer.py

@@ -19,15 +19,15 @@
     >>>
     >>> class Person:
     ...     def __init__(self):
-    ...         self.first_name = u"Some"
-    ...         self.last_name = u"Body"
+    ...         self.first_name = "Some"
+    ...         self.last_name = "Body"
     ...         self.username = "some1"
-    ...         self.presentation = u"Just a Python & RDF hacker."
+    ...         self.presentation = "Just a Python & RDF hacker."
     ...         self.image = "/images/persons/" + self.username + ".jpg"
     ...         self.site = "http://example.net/"
     ...         self.start_date = datetime.date(2009, 9, 4)
     ...     def get_full_name(self):
-    ...         return u" ".join([self.first_name, self.last_name])
+    ...         return " ".join([self.first_name, self.last_name])
     ...     def get_absolute_url(self):
     ...         return "/persons/" + self.username
     ...     def get_thumbnail_url(self):
@@ -130,7 +130,7 @@ def about(self, subject, **kws):
             rdflib.term.BNode(...)
             >>> d.about("http://example.org/")
             >>> d._current()
-            rdflib.term.URIRef(u'http://example.org/')
+            rdflib.term.URIRef('http://example.org/')
 
         """
         kws.setdefault("base", self.base)
@@ -152,7 +152,7 @@ def value(self, p, v, **kws):
             >>> d = Describer(about="http://example.org/")
             >>> d.value(RDFS.label, "Example")
             >>> d.graph.value(URIRef('http://example.org/'), RDFS.label)
-            rdflib.term.Literal(u'Example')
+            rdflib.term.Literal('Example')
 
         """
         v = cast_value(v, **kws)
@@ -173,15 +173,15 @@ def rel(self, p, o=None, **kws):
             >>> d = Describer(about="/", base="http://example.org/")
             >>> _ctxt = d.rel(RDFS.seeAlso, "/about")
             >>> d.graph.value(URIRef('http://example.org/'), RDFS.seeAlso)
-            rdflib.term.URIRef(u'http://example.org/about')
+            rdflib.term.URIRef('http://example.org/about')
 
             >>> with d.rel(RDFS.seeAlso, "/more"):
             ...     d.value(RDFS.label, "More")
             >>> (URIRef('http://example.org/'), RDFS.seeAlso,
             ...         URIRef('http://example.org/more')) in d.graph
             True
             >>> d.graph.value(URIRef('http://example.org/more'), RDFS.label)
-            rdflib.term.Literal(u'More')
+            rdflib.term.Literal('More')
 
         """
 
@@ -208,7 +208,7 @@ def rev(self, p, s=None, **kws):
             ...         URIRef('http://example.org/')) in d.graph
             True
             >>> d.graph.value(URIRef('http://example.net/'), RDFS.label)
-            rdflib.term.Literal(u'Net')
+            rdflib.term.Literal('Net')
 
         """
         kws.setdefault("base", self.base)

rdflib/plugins/parsers/notation3.py

@@ -145,11 +145,11 @@ def join(here: str, there: str) -> str:
 
     We grok IRIs
 
-    >>> len(u'Andr\\xe9')
+    >>> len('Andr\\xe9')
     5
 
-    >>> join('http://example.org/', u'#Andr\\xe9')
-    u'http://example.org/#Andr\\xe9'
+    >>> join('http://example.org/', '#Andr\\xe9')
+    'http://example.org/#Andr\\xe9'
     """
 
     #    assert(here.find("#") < 0), \

rdflib/query.py

@@ -125,28 +125,28 @@ class ResultRow(Tuple[rdflib.term.Identifier, ...]):
     >>> rr=ResultRow({ Variable('a'): URIRef('urn:cake') }, [Variable('a')])
 
     >>> rr[0]
-    rdflib.term.URIRef(u'urn:cake')
+    rdflib.term.URIRef('urn:cake')
     >>> rr[1]
     Traceback (most recent call last):
         ...
     IndexError: tuple index out of range
 
     >>> rr.a
-    rdflib.term.URIRef(u'urn:cake')
+    rdflib.term.URIRef('urn:cake')
     >>> rr.b
     Traceback (most recent call last):
         ...
     AttributeError: b
 
     >>> rr['a']
-    rdflib.term.URIRef(u'urn:cake')
+    rdflib.term.URIRef('urn:cake')
     >>> rr['b']
     Traceback (most recent call last):
         ...
     KeyError: 'b'
 
     >>> rr[Variable('a')]
-    rdflib.term.URIRef(u'urn:cake')
+    rdflib.term.URIRef('urn:cake')
 
     .. versionadded:: 4.0
 

rdflib/resource.py

@@ -63,13 +63,13 @@
 Retrieve some basic facts::
 
     >>> person.identifier
-    rdflib.term.URIRef(u'http://example.org/person/some1#self')
+    rdflib.term.URIRef('http://example.org/person/some1#self')
 
     >>> person.value(FOAF.name)
-    rdflib.term.Literal(u'Some Body')
+    rdflib.term.Literal('Some Body')
 
     >>> person.value(RDFS.comment)
-    rdflib.term.Literal(u'Just a Python & RDF hacker.', lang=u'en')
+    rdflib.term.Literal('Just a Python & RDF hacker.', lang='en')
 
 Resources can be sliced (like graphs, but the subject is fixed)::
 
@@ -82,21 +82,21 @@
 Resources as unicode are represented by their identifiers as unicode::
 
     >>> %(unicode)s(person)  #doctest: +SKIP
-    u'Resource(http://example.org/person/some1#self'
+    'Resource(http://example.org/person/some1#self'
 
 Resource references are also Resources, so you can easily get e.g. a qname
 for the type of a resource, like::
 
     >>> person.value(RDF.type).qname()
-    u'foaf:Person'
+    'foaf:Person'
 
 Or for the predicates of a resource::
 
     >>> sorted(
     ...     p.qname() for p in person.predicates()
     ... )  #doctest: +NORMALIZE_WHITESPACE +SKIP
-    [u'foaf:depiction', u'foaf:homepage',
-     u'foaf:name', u'rdf:type', u'rdfs:comment']
+    ['foaf:depiction', 'foaf:homepage',
+     'foaf:name', 'rdf:type', 'rdfs:comment']
 
 Follow relations and get more data from their Resources as well::
 
@@ -172,18 +172,18 @@
 
     >>> subclasses = list(artifact.transitive_subjects(RDFS.subClassOf))
     >>> [c.qname() for c in subclasses]
-    [u'v:Artifact', u'v:Document', u'v:Paper']
+    ['v:Artifact', 'v:Document', 'v:Paper']
 
 and superclasses from the last subclass::
 
     >>> [c.qname() for c in subclasses[-1].transitive_objects(RDFS.subClassOf)]
-    [u'v:Paper', u'v:Document', u'v:Artifact']
+    ['v:Paper', 'v:Document', 'v:Artifact']
 
 Get items from the Choice::
 
     >>> choice = Resource(graph, URIRef("http://example.org/def/v#Choice"))
     >>> [it.qname() for it in choice.value(OWL.oneOf).items()]
-    [u'v:One', u'v:Other']
+    ['v:One', 'v:Other']
 
 On add, other resources are auto-unboxed:
     >>> paper = Resource(graph, URIRef("http://example.org/def/v#Paper"))

test/test_misc/test_bnode_ncname.py

@@ -25,8 +25,7 @@ def is_ncname(value):
     >>> assert is_ncname('') == False
     >>> assert is_ncname('999') == False
     >>> assert is_ncname('x') == True
-    >>> assert is_ncname(u'x') == True
-    >>> assert is_ncname(u'Michèle') == True
+    >>> assert is_ncname('Michèle') == True
 
     However, vanilla uuid4s are not necessarily NCNames: