Develop Reference

Installing Opencv on remote connection

Installing Opencv on Ubunto server using the remote connection,
cmd Line: pip install opencv-python
getting error msg
ERROR: Exceptio n:
Traceback (most recent call last):
File "/home/user/anaconda3/lib/python3.7/site-packages/pip/_vendor/urllib3/co ntrib/pyopenssl.py", line 313, in recv_into
return self.connection.recv_into(*args, **kwargs)
File "/home/user/anaconda3/lib/python3.7/site-packages/OpenSSL/SSL.py", line 1822, in recv_into
self._raise_ssl_error(self._ssl, result)
File "/home/user/anaconda3/lib/python3.7/site-packages/OpenSSL/SSL.py", line 1622, in _raise_ssl_error
raise WantReadError()
OpenSSL.SSL.WantReadError
why receiving this error msg

Firebase-admin Appengine connection broken issue in python 2.7

I am using Google Appengine with python 2.7 standard environment and try to push data on Firebase Realtime database using firebase-admin.But I got following error when push or get data,is it authentication issue,how to resolve this issue?
('Connection broken: IncompleteRead(62 bytes read)', IncompleteRead(62 bytes read))
Traceback (most recent call last):
File "/base/data/home/runtimes/python27_experiment/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1511, in __call__
rv = self.handle_exception(request, response, e)
File "/base/data/home/runtimes/python27_experiment/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1505, in __call__

python and phoenixdb on Ubuntu (or Windows). How to?

I have created a python script connecting to a Phoenix HBase to analyze some data. I want to set this script up on crontab on a ubuntu server that I have running.
The script is perfectly able to run on my Windows 10 machine. But when I try to use the phoenixdb connector on Ubuntu I get an error on RunTime.
>>> import phoenixdb
>>> url = '<some-url>'
>>> conn = phoenixdb.connect(url, autocommit=True)
Traceback (most recent call last):
File "/home/ubuntu/.local/lib/python3.5/site-packages/phoenixdb/avatica.py", line 156, in connect
self.connection.connect()
File "/usr/lib/python3.5/http/client.py", line 849, in connect
(self.host,self.port), self.timeout, self.source_address)
File "/usr/lib/python3.5/socket.py", line 711, in create_connection
raise err
File "/usr/lib/python3.5/socket.py", line 702, in create_connection
sock.connect(sa)
TimeoutError: [Errno 110] Connection timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/ubuntu/.local/lib/python3.5/site-packages/phoenixdb/__init__.py", line 63, in connect
client.connect()
File "/home/ubuntu/.local/lib/python3.5/site-packages/phoenixdb/avatica.py", line 158, in connect
raise errors.InterfaceError('Unable to connect to the specified service', e)
phoenixdb.errors.InterfaceError: ('Unable to connect to the specified service', TimeoutError(110, 'Connection timed out'), None, None)
I was hoping someone here knows a way to fix this problem?
I am running Python 3.6 on Windows and Python 3.5.2 on Ubuntu, but I doubt that that is the problem.
EDIT:
I have now started a Windows 2012 Server and have tried setting my script up here as well, and it seems not to be a problem solely for Ubuntu. I am getting the exact same error on Windows.
>>> import phoenixdb
>>> url = '<some-url>'
>>> conn = phoenixdb.connect(url, autocommit=True)
Traceback (most recent call last):
File "C:\Users\Administrator\Anaconda3\lib\site-packages\phoenixdb\avatica.py", line 156, in connect
self.connection.connect()
File "C:\Users\Administrator\Anaconda3\lib\http\client.py", line 936, in connect
(self.host,self.port), self.timeout, self.source_address)
File "C:\Users\Administrator\Anaconda3\lib\socket.py", line 722, in create_connection raise err
File "C:\Users\Administrator\Anaconda3\lib\socket.py", line 713, in create_connection
sock.connect(sa)
TimeoutError: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\Administrator\Anaconda3\lib\site-packages\phoenixdb\__init__.py", line 63, in connect
client.connect()
File "C:\Users\Administrator\Anaconda3\lib\site-packages\phoenixdb\avatica.py", line 158, in connect
raise errors.InterfaceError('Unable to connect to the specified service', e)
phoenixdb.errors.InterfaceError: ('Unable to connect to the specified service',
TimeoutError(10060, 'A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond', None, 10060, None), None, None)
I recently did format the PC that I developed the script on. The was using this phoenixdb connector, and I did not experience a similar problem on that.
I did also try to install Python 3.6 on the Windows machine (similar to the same python version that I installed on my normal PC - the one I developed the script on).
I'm really lost for finding a solution..

I finally found the problem. It had nothing to do with the machines I set up my script on. It had to do with security settings on the AWS Machines that both the Ubuntu and Windows Servers were.

error on connection to redis-server in chat messenger

I have developed a chat system by Python. libraries been used :easygui,pycrypto,netifaces,stepic,redis,rabbitmq,pika,PIL and setuptools.
all libraries seems installed well refer to : python> import library
by using redis-server on localhost, users can connect to redis and signup,login,chat,.. but when setting redis on different device and change localhost to redis server ip in codes, i receive following errors. (am using lubuntu last version in oracle virtual machine)
enter code here
Traceback (most recent call last):
File "kiducb.py", line 392, in <module>
g = Gui()
File "kiducb.py", line 19, in __init__
self.welcome()
File "kiducb.py", line 33, in welcome
rl = self.login()
File "kiducb.py", line 126, in login
resp = self.check_up(fvals[0], fvals[1], mac)
File "kiducb.py", line 76, in check_up
val = self.re.get(username)
File "/usr/lib/python2.7/dist-packages/redis/client.py", line 423, in get
return self.execute_command('GET', name)
File "/usr/lib/python2.7/dist-packages/redis/client.py", line 283, in execute_command
connection.send_command(*args)
File "/usr/lib/python2.7/dist-packages/redis/connection.py", line 260, in send_command
self.send_packed_command(self.pack_command(*args))
File "/usr/lib/python2.7/dist-packages/redis/connection.py", line 243, in
send_packed_command
self.connect()
File "/usr/lib/python2.7/dist-packages/redis/connection.py", line 191, in connect
raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 111 connecting 10.1.1.12:6379. Connection refused.

to solve this problem, i removed the redis-server which earlier i installed by useing apt-get from system, and i folowed this link instruction: https://www.digitalocean.com/community/articles/how-to-install-and-use-redis

Error while Happybase connection with hbase

>>>import happybase
>>>cnx=happybase.Connection('localhost')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/seyf/envname/local/lib/python2.7/site-packages/happybase/api.py", line 121, in __init__
self.open()
File "/home/seyf/envname/local/lib/python2.7/site-packages/happybase/api.py", line 138, in open
self.transport.open()
File "/home/seyf/envname/local/lib/python2.7/site-packages/thrift/transport/TTransport.py", line 149, in open
return self.__trans.open()
File "/home/seyf/envname/local/lib/python2.7/site-packages/thrift/transport/TSocket.py", line 99, in open
message=message)
thrift.transport.TTransport.TTransportException: Could not connect to localhost:9090

First, make sure the thrift server is running:
hbase thrift start
Then make sure you get the right port number (default 9090)\
cnx=happybase.Connection('localhost', port=xxxx)

This looks like a network problem. Did you actually start the Thrift server? (It's not the same process as the HBase daemon itself.)