Add multiple servers support to Python client (#1969)

* add multiple server support to python client

* various fixes

* minor fixes, add tests

* test oas2 python first

* fix tests

* fix issues reported by flake8

* update code format

* add python petstore to ensure up-to-date

* rearrange test

* fix E501

* fix tests

* add new files

* fix script permission

* fix index check

* update samples

samples/openapi3/client/petstore/python/setup.py

@@ -0,0 +1,39 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    OpenAPI spec version: 1.0.0
+    Generated by: https://openapi-generator.tech
+"""
+
+
+from setuptools import setup, find_packages  # noqa: H301
+
+NAME = "petstore-api"
+VERSION = "1.0.0"
+# To install the library, run the following
+#
+# python setup.py install
+#
+# prerequisite: setuptools
+# http://pypi.python.org/pypi/setuptools
+
+REQUIRES = ["urllib3 >= 1.15", "six >= 1.10", "certifi", "python-dateutil"]
+
+setup(
+    name=NAME,
+    version=VERSION,
+    description="OpenAPI Petstore",
+    author_email="",
+    url="",
+    keywords=["OpenAPI", "OpenAPI-Generator", "OpenAPI Petstore"],
+    install_requires=REQUIRES,
+    packages=find_packages(),
+    include_package_data=True,
+    long_description="""\
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+    """
+)