Building a Python Web Application Using Flask and Neo4j

[B3DS-D01]

File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\database_init_.py", line 318, in new
inst = cls.__instances[key]
KeyError: (<class 'py2neo.database.Graph'>, <ServerAddress settings={'host': 'localhost', 'http_port': 7474}>, 'data')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\packages\httpstream\http.py", line 322, in submit
response = send()
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\packages\httpstream\http.py", line 317, in send
http.request(xstr(method), xstr(uri.absolute_path_reference), body, headers)
File "C:\Users\abc\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "C:\Users\abc\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "C:\Users\abc\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 1234, in endheaders
self.send_output(message_body, encode_chunked=encode_chunked)
File "C:\Users\abc\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 1026, in send_output
self.send(msg)
File "C:\Users\abc\AppData\Local\Programs\Python\Python36-32\lib\http\client.py", line 964, in send
self.connect()
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\packages\httpstream\http.py", line 80, in connect
self.source_address)
File "C:\Users\abc\AppData\Local\Programs\Python\Python36-32\lib\socket.py", line 724, in create_connection
raise err
File "C:\Users\abc\AppData\Local\Programs\Python\Python36-32\lib\socket.py", line 713, in create_connection
sock.connect(sa)
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Program Files\JetBrains\PyCharm 2018.1.2\helpers\pydev\pydevd.py", line 1664, in
main()
File "C:\Program Files\JetBrains\PyCharm 2018.1.2\helpers\pydev\pydevd.py", line 1658, in main
globals = debugger.run(setup['file'], None, None, is_module)
File "C:\Program Files\JetBrains\PyCharm 2018.1.2\helpers\pydev\pydevd.py", line 1068, in run
pydev_imports.execfile(file, globals, locals) # execute the script
File "C:\Program Files\JetBrains\PyCharm 2018.1.2\helpers\pydev_pydev_imps_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "C:/Users/abc/PycharmProjects/FlaskWithNeo4j/run.py", line 1, in
from blog import app
File "C:\Users\abc\PycharmProjects\FlaskWithNeo4j\blog_init.py", line 1, in
from .views import app
File "C:\Users\abc\PycharmProjects\FlaskWithNeo4j\blog\views.py", line 1, in
from .models import User, get_todays_recent_posts
File "C:\Users\abc\PycharmProjects\FlaskWithNeo4j\blog\models.py", line 11, in
graph = Graph(url + '/db/data/')
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\database_init.py", line 327, in new
use_bolt = version_tuple(inst.remote.get().content["neo4j_version"]) >= (3,)
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\database\http.py", line 154, in get
response = self.__base.get(headers=headers, redirect_limit=redirect_limit, **kwargs)
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\packages\httpstream\http.py", line 966, in get
return self.__get_or_head("GET", if_modified_since, headers, redirect_limit, **kwargs)
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\packages\httpstream\http.py", line 943, in __get_or_head
return rq.submit(redirect_limit=redirect_limit, **kwargs)
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\packages\httpstream\http.py", line 433, in submit
http, rs = submit(self.method, uri, self.body, self.headers)
File "C:\Users\abc\venv\untitled2\lib\site-packages\py2neo\packages\httpstream\http.py", line 362, in submit
raise SocketError(code, description, host_port=uri.host_port)
py2neo.packages.httpstream.http.SocketError: Unknown error

[jankubierecki]

Make sure you've installed neo4j globally first and have it running.