--- a/env/lib/python3.7/site-packages/rdflib/plugins/sparql/evalutils.py	Thu May 14 16:47:39 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,125 +0,0 @@
-import collections
-
-from rdflib.term import Variable, Literal, BNode, URIRef
-
-from rdflib.plugins.sparql.operators import EBV
-from rdflib.plugins.sparql.parserutils import Expr, CompValue, value
-from rdflib.plugins.sparql.sparql import SPARQLError, NotBoundError
-
-
-def _diff(a, b, expr):
-    res = set()
-
-    for x in a:
-        if all(not x.compatible(y) or not _ebv(expr, x.merge(y)) for y in b):
-            res.add(x)
-
-    return res
-
-
-def _minus(a, b):
-    for x in a:
-        if all((not x.compatible(y)) or x.disjointDomain(y) for y in b):
-            yield x
-
-
-
-def _join(a, b):
-    for x in a:
-        for y in b:
-            if x.compatible(y):
-                yield x.merge(y)
-
-
-def _ebv(expr, ctx):
-
-    """
-    Return true/false for the given expr
-    Either the expr is itself true/false
-    or evaluates to something, with the given ctx
-
-    an error is false
-    """
-
-    try:
-        return EBV(expr)
-    except SPARQLError:
-        pass
-    if isinstance(expr, Expr):
-        try:
-            return EBV(expr.eval(ctx))
-        except SPARQLError:
-            return False  # filter error == False
-    elif isinstance(expr, CompValue):
-        raise Exception(
-            "Weird - filter got a CompValue without evalfn! %r" % expr)
-    elif isinstance(expr, Variable):
-        try:
-            return EBV(ctx[expr])
-        except:
-            return False
-    return False
-
-
-def _eval(expr, ctx, raise_not_bound_error=True):
-    if isinstance(expr, (Literal, URIRef)):
-        return expr
-    if isinstance(expr, Expr):
-        return expr.eval(ctx)
-    elif isinstance(expr, Variable):
-        try:
-            return ctx[expr]
-        except KeyError:
-            if raise_not_bound_error:
-                raise NotBoundError("Variable %s is not bound" % expr)
-            else:
-                return None
-    elif isinstance(expr, CompValue):
-        raise Exception(
-            "Weird - _eval got a CompValue without evalfn! %r" % expr)
-    else:
-        raise Exception("Cannot eval thing: %s (%s)" % (expr, type(expr)))
-
-
-def _filter(a, expr):
-    for c in a:
-        if _ebv(expr, c):
-            yield c
-
-
-def _fillTemplate(template, solution):
-
-    """
-    For construct/deleteWhere and friends
-
-    Fill a triple template with instantiated variables
-    """
-
-    bnodeMap = collections.defaultdict(BNode)
-    for t in template:
-        s, p, o = t
-
-        _s = solution.get(s)
-        _p = solution.get(p)
-        _o = solution.get(o)
-
-        # instantiate new bnodes for each solution
-        _s, _p, _o = [bnodeMap[x] if isinstance(
-            x, BNode) else y for x, y in zip(t, (_s, _p, _o))]
-
-        if _s is not None and \
-                _p is not None and \
-                _o is not None:
-
-            yield (_s, _p, _o)
-
-def _val(v):
-    """ utilitity for ordering things"""
-    if isinstance(v, Variable):
-        return (0, v)
-    elif isinstance(v, BNode):
-        return (1, v)
-    elif isinstance(v, URIRef):
-        return (2, v)
-    elif isinstance(v, Literal):
-        return (3, v)