--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/lib/python3.7/site-packages/rdflib/exceptions.py	Sat May 02 07:14:21 2020 -0400
@@ -0,0 +1,74 @@
+"""
+TODO:
+"""
+
+__all__ = ['Error', 'TypeCheckError', 'SubjectTypeError',
+           'PredicateTypeError', 'ObjectTypeError', 'ContextTypeError',
+           'ParserError']
+
+
+class Error(Exception):
+    """Base class for rdflib exceptions."""
+    def __init__(self, msg=None):
+        Exception.__init__(self, msg)
+        self.msg = msg
+
+
+class TypeCheckError(Error):
+    """Parts of assertions are subject to type checks."""
+
+    def __init__(self, node):
+        Error.__init__(self, node)
+        self.type = type(node)
+        self.node = node
+
+
+class SubjectTypeError(TypeCheckError):
+    """Subject of an assertion must be an instance of URIRef."""
+    def __init__(self, node):
+        TypeCheckError.__init__(self, node)
+        self.msg = "Subject must be instance of URIRef or BNode: %s(%s)" \
+            % (self.node, self.type)
+
+
+class PredicateTypeError(TypeCheckError):
+    """Predicate of an assertion must be an instance of URIRef."""
+    def __init__(self, node):
+        TypeCheckError.__init__(self, node)
+        self.msg = "Predicate must be a URIRef instance: %s(%s)" \
+            % (self.node, self.type)
+
+
+class ObjectTypeError(TypeCheckError):
+    """Object of an assertion must be an instance of URIRef, Literal,
+    or BNode."""
+    def __init__(self, node):
+        TypeCheckError.__init__(self, node)
+        self.msg = "\
+Object must be instance of URIRef, Literal, or BNode: %s(%s)" % \
+            (self.node, self.type)
+
+
+class ContextTypeError(TypeCheckError):
+    """Context of an assertion must be an instance of URIRef."""
+    def __init__(self, node):
+        TypeCheckError.__init__(self, node)
+        self.msg = "Context must be instance of URIRef or BNode: %s(%s)" \
+            % (self.node, self.type)
+
+
+class ParserError(Error):
+    """RDF Parser error."""
+    def __init__(self, msg):
+        Error.__init__(self, msg)
+        self.msg = msg
+
+    def __str__(self):
+        return self.msg
+
+
+class UniquenessError(Error):
+    """A uniqueness assumption was made in the context, and that is not true"""
+    def __init__(self, values):
+        Error.__init__(self, "\
+Uniqueness assumption is not fulfilled. Multiple values are: %s" % values)