Fixing parsing issue in Python 2.6.1

[brandonmoser]

(Re)Fixes issue #4

[ztemac32]

~/g/f/w/bin (master|✔) $ python wsdump.py
wss://www.bitmex.com/realtime/websocket?accessToken=xnyXWIQL0sbrLC91ISDlFhuLUGQJNq05A...
Press Ctrl+C to quit

< {"info":"Welcome to the BitMEX Realtime API.","version":"1.1.0",
"timestamp":"2015-01-18T10:14:06.802Z","docs":"https://www.bitmex.com/app/wsAPI","heartbeatEnabled":false}

"help"

< {"info":"See https://www.bitmex.com/app/wsAPI and https://www.bitmex.com/explorer for more documentation.",...}

{"op": "subscribe", "args": ["trade:XBTUSD","instrument:XBTUSD"]}

< {"success":true,"subscribe":"trade:XBTUSD",
"request":{"op":"subscribe","args":["trade:XBTUSD","instrument:XBTUSD"]}}
< {"success":true,"subscribe":"instrument:XBTUSD",
"request":{"op":"subscribe","args":["trade:XBTUSD","instrument:XBTUSD"]}}

< {"table":"trade","action": "partial", ...}
< {"table":"instrument","action": "partial", ...}

< {"table":"instrument","action":"update","data":[{"symbol":"XBTUSD","fairPrice":380.52,
"markPrice":380.52,"indicativeSettlePrice":380.52,"timestamp":"2016-01-15T22:33:15.000Z"}]}
< {"table":"instrument","action":"update","data":[{"symbol":"XBTUSD","openValue":673520400,
"timestamp":"2016-01-15T22:33:15.000Z"}]}

[liris]

I don't have python 2.6.1 environment. The following code works fine on python 2.6.9

import urlparse

parsed = urlparse.urlparse("ws://loclhost:8080/foo")
print parsed
parsed = urlparse.urlparse("//localhost:8080/foo",  scheme="ws" )

[engn33r]

This PR is quite old, and it seems to be relevant only for Python 2 (now EOL), but I do not currently see an issue with it. My only hesitation is that it might be possible to remove the scheme parameter from the urllib.parse() call entirely, which would be my preference if there is no impact to functionality.

My thought process: Based on my understanding, urllib.parse() in Python 3 does support the ws and wss schemes. However, this documentation for Python 2 does not indicate support for ws or wss schemes. The scheme value in urllib.parse() doesn't really matter, since parsed.scheme, the only value impacted by this PR, is never used. Instead, the scheme value used is currently parsed from the url.split() line before the urllib.parse() call.

[engn33r]

Except for backported fixes, this is expected to be the last commit for Python 2 support.