added configuration 'http_proxy' to allow the usage of a proxy

.travis.yml

@@ -0,0 +1,33 @@
+# ref: https://docs.travis-ci.com/user/languages/python
+language: python
+
+# Keep this matrix in sync with main repo's test matrix
+matrix:
+    include:
+     - python: 2.7
+       env: TOXENV=py27
+     - python: 2.7
+       env: TOXENV=py27-functional
+     - python: 2.7
+       env: TOXENV=update-pep8
+     - python: 2.7
+       env: TOXENV=docs
+     - python: 2.7
+       env: TOXENV=coverage,codecov
+     - python: 3.4
+       env: TOXENV=py34
+     - python: 3.5
+       env: TOXENV=py35
+     - python: 3.5
+       env: TOXENV=py35-functional
+     - python: 3.6
+       env: TOXENV=py36
+     - python: 3.6
+       env: TOXENV=py36-functional
+
+install:
+  - pip install tox
+
+script:
+  - tox
+

configuration.py

@@ -89,6 +89,10 @@ def __init__(self):
         # Set this to True/False to enable/disable SSL hostname verification.
         self.assert_hostname = None
 
+	# http proxy setting
+        self.http_proxy_url = None
+
+
     @property
     def logger_file(self):
         """

rest.py

@@ -107,9 +107,14 @@ def __init__(self, pools_size=4, config=configuration):
             kwargs['assert_hostname'] = config.assert_hostname
 
         # https pool manager
-        self.pool_manager = urllib3.PoolManager(
-            **kwargs
-        )
+        if config.http_proxy_url is not None:
+            self.pool_manager = urllib3.proxy_from_url(
+                config.http_proxy_url, **kwargs
+            )
+        else:
+            self.pool_manager = urllib3.PoolManager(
+	        **kwargs
+            )
 
     def request(self, method, url, query_params=None, headers=None,
                 body=None, post_params=None, _preload_content=True, _request_timeout=None):

run_tox.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+# Copyright 2017 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and 
+# limitations under the License.
+
+# Script to fetch latest swagger spec.
+# Puts the updated spec at api/swagger-spec/
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+RUNNING_DIR=$(pwd)
+TMP_DIR=$(mktemp -d)
+
+function cleanup()
+{
+  cd "${RUNNING_DIR}"
+#  rm -rf "${TMP_DIR}"
+}
+trap cleanup EXIT SIGINT
+
+
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")
+pushd "${SCRIPT_ROOT}" > /dev/null
+SCRIPT_ROOT=`pwd`
+popd > /dev/null
+
+cd "${TMP_DIR}"
+git clone https://github.com/kubernetes-incubator/client-python.git
+cd client-python
+cp -r "${SCRIPT_ROOT}/." kubernetes/base
+pip install -r requirements.txt
+pip install -r test-requirements.txt
+
+# Run the user-provided command.
+"${@}"
+

tox.ini

@@ -0,0 +1,11 @@
+[tox]
+skipsdist = True
+envlist = py27, py34, py35, py36, py27-functional, py36-functional, py35-functional, coverage, codecov
+
+[testenv]
+passenv = TOXENV CI TRAVIS TRAVIS_*
+commands =
+   python -V
+   pip install nose
+   ./run_tox.sh nosetests []
+