flask apns - SysCallError: (-1, 'Unexpected EOF') - python-2.7

Question

I'm trying to use Flask-APNS, previously I check that my ck.pem (cert and key on one file) works on a php server.
But everytime I try to execute:
from apns import APNS
#apns = APNS(app, cert_file='ZivingCert.pem', key_file='ZivingKey.pem',passphrase='mypassphrase')
apns = APNS(app, cert_file='ck.pem', passphrase='mypassphrase')
apns.send_message(tokens=['fad71c0b27416f055bfb1617c8db4e55d1b98b412443e68fba65cfe59748b81a'], alert='hi world', extra={})
I get this error:
WARNING:apnsclient.backends.stdio:Failed to establish socket/SSL connection to ('gateway.sandbox.push.apple.com', 2195)
No handlers could be found for logger "apnsclient.backends.stdio"
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py", line 85, in run
self.result = application(self.environ, self.start_response)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask_restful/__init__.py", line 263, in error_router
return original_handler(e)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask_restful/__init__.py", line 260, in error_router
return self.handle_error(e)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask_restful/__init__.py", line 263, in error_router
return original_handler(e)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask_restful/__init__.py", line 260, in error_router
return self.handle_error(e)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask_restful/__init__.py", line 431, in wrapper
resp = resource(*args, **kwargs)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask_httpauth.py", line 60, in decorated
return f(*args, **kwargs)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask/views.py", line 84, in view
return self.dispatch_request(*args, **kwargs)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/flask_restful/__init__.py", line 521, in dispatch_request
resp = meth(*args, **kwargs)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/scheduler/ws/v1/schedulesapns.py", line 21, in get
apns.send_message(tokens=['fad71c0b27416f055bfb1617c8db4e55d1b98b412443e68fba65cfe59748b81a'], alert='hi world', extra={})
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/scheduler/apns/__init__.py", line 134, in send_message
res = srv.send(message)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/apns.py", line 90, in send
status = self._connection.send(message)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/transport.py", line 255, in send
with self:
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/transport.py", line 228, in __enter__
self._open_connection() # can raise exception, bubblit up to the top
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/transport.py", line 519, in _open_connection
timeout=self.session.connect_timeout
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/backends/__init__.py", line 88, in get_cached_connection
return self.get_new_connection(address, certificate, timeout=timeout)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/backends/stdio.py", line 378, in get_new_connection
return self.connection_class(address, certificate, timeout=timeout)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/backends/stdio.py", line 142, in __init__
self._open_connection(timeout)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/backends/stdio.py", line 153, in _open_connection
self._connect_and_handshake()
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/apnsclient/backends/stdio.py", line 188, in _connect_and_handshake
self._connection.do_handshake()
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/OpenSSL/SSL.py", line 1442, in do_handshake
self._raise_ssl_error(self._ssl, result)
File "/Users/Ricardo/Documents/python/openshift/scheduler_env/lib/python2.7/site-packages/OpenSSL/SSL.py", line 1180, in _raise_ssl_error
raise SysCallError(-1, "Unexpected EOF")
SysCallError: (-1, 'Unexpected EOF')

Answer 1

I finally fixed thanks to logging messages.
To enable logging:
import logging
logging.basicConfig()
To fix WARNING:apnsclient.backends.stdio:Failed to establish socket/SSL connection to ('gateway.sandbox.push.apple.com', 2195) caused by security issue with SSL version 3.0 the Apple Push Notification server remove support for SSL 3.0 since Wednesday, October 29 of 2014.
def my_callback(key, reason):
print "my_callbaaaaaaack"
print str(key)
print str(reason)
import OpenSSL
OpenSSL.SSL.SSLv3_METHOD = OpenSSL.SSL.TLSv1_METHOD
from apns import APNS
apns = APNS(app, cert_file='ck.pem', passphrase='mypassphrase', failure_callback=my_callback)