高可用升级Python3

#!/usr/bin/python
改为
#!/usr/bin/python3

from six.moves import http_client as http
改为
from http import client as http

429: "overLimit"
改为
http.TOO_MANY_REQUESTS: "overLimit"

six.text_type
改为
str

import six.moves.urllib.parse as urlparse
改为
from urllib import parse as urlparse

@six.add_metaclass(abc.ABCMeta)
class V1APIExtensionBase(object):
改为
class V1APIExtensionBase(object, metaclass=abc.ABCMeta):

if six.PY3:
    response.headers['Content-Length'] = (str(
        response.headers['Content-Length']))
else:
    # NOTE: we need to encode 'Content-Length' header, since
    # webob.Response auto sets it if "body" attr is presented.
    # github.com/Pylons/webob/blob/1.5.0b0/webob/response.py#L147
    response.headers['Content-Length'] = utils.utf8(
    response.headers['Content-Length'])
改为
response.headers['Content-Length'] = (str(
    response.headers['Content-Length']))

import six

if six.PY2:  # noqa
    import urllib2
else:  # noqa
    from urllib import request as urllib2

urllib2.parse_http_list(value)

改为
from urllib import request
request.parse_http_list(value)

six.unichr(i)
改为
chr(i)

six.binary_type
改为
bytes

six.reraise(*e.exc_info)
改为

def reraise(tp, value, tb=None):
    try:
        if value is None:
            value = tp()
        if value.__traceback__ is not tb:
            raise value.with_traceback(tb)
        raise value
    finally:
        value = None
        tb = None
reraise(*e.exc_info)

@six.wraps(f)
改为
@functools.wraps(f)

six.reraise(type(desired_exc), desired_exc, sys.exc_info()[2])
改为
from masakari import utils
utils.reraise(type(desired_exc), desired_exc, sys.exc_info()[2])

from six.moves import configparser
改为
import configparser

import six

@six.add_metaclass(abc.ABCMeta)
class DriverBase(object):
改为
class DriverBase(object, metaclass=abc.ABCMeta):

@six.wraps(f)
改为
import functools
@functools.wraps(f)

from six.moves import configparser
改为
import configparser

if six.PY2:
    is_method = inspect.ismethod
else:
    def is_method(obj):
        # Unbound methods became regular functions on Python 3
        return inspect.ismethod(obj) or inspect.isfunction(obj)
改为
def is_method(obj):
    return inspect.ismethod(obj) or inspect.isfunction(obj)