[ ]

result = urlparse.urlparse("postgresql://zerg:pass[word@server_name:5432/database_name")

File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urlparse.py", line 214, in urlsplit
    raise ValueError("Invalid IPv6 URL")
ValueError: Invalid IPv6 URL

>>> import urllib.parse
>>> 
>>> hex(ord('['))
'0x5b'
>>> hex(ord(']'))
'0x5d'
>>> urllib.parse.urlparse('postgresql://zerg:pass%5Bword@server_name:5432/database_name')
ParseResult(scheme='postgresql', netloc='zerg:pass%5Bword@server_name:5432', path='/database_name', params='', query='', fragment='')
>>>

# -*- coding: utf-8 -*-
import pgwrap
db = pgwrap.connection(url='postgresql://zerg:pass%5Bword@server_name:5432/database_name')

class connection(object):
    def __init__(self,url=None,hstore=False,log=None,logf=None,min=1,max=5,
                               default_cursor=DictCursor):
        params = urlparse.urlparse(url or 
                                   os.environ.get('DATABASE_URL') or 
                                   'postgres://localhost/')
        self.pool = ThreadedConnectionPool(min,max,
                                           database=params.path[1:],
                                           user=params.username,
                                           password=params.password,
                                           host=params.hostname,
                                           port=params.port,
                    )

pass%5Bword