Traceback (most recent call last):


 "C:\Users\S10500\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\widgets\ipythonconsole\client.py", line 575, in show_time

elapsed_time = time.monotonic() - self.t0
TypeError: unsupported operand type(s) for -: 'float' and 'NoneType'

Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/__init__.py", line 200, in dump

return dump_all([data], stream, Dumper=Dumper, **kwds)


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/__init__.py", line 188, in dump_all

dumper.represent(data)


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/representer.py", line 27, in represent

self.serialize(node)


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/serializer.py", line 54, in serialize

self.serialize_node(node, None, None)


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/serializer.py", line 108, in serialize_node

self.serialize_node(value, node, key)


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/serializer.py", line 100, in serialize_node

self.emit(SequenceEndEvent())


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/emitter.py", line 115, in emit

self.state()


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/emitter.py", line 374, in expect_first_block_sequence_item

return self.expect_block_sequence_item(first=True)


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/emitter.py", line 384, in expect_block_sequence_item

self.expect_node(sequence=True)


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/emitter.py", line 242, in expect_node

self.process_tag()


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/emitter.py", line 489, in process_tag

self.prepared_tag = self.prepare_tag(tag)


 "/Users/schrockn/venvs/prezi-dagster-dec-4/lib/python3.7/site-packages/yaml/emitter.py", line 607, in prepare_tag

chunks.append('%%%02X' % ord(ch))
TypeError: ord() expected string of length 1, but int found
