[python] Update python versions (#8042)

* Remove redundant encoding definitions

UTF-8 is already the default encoding in Python 3.

* Remove Python3.4 related requirements

* Remove dead Python version 3.5

* Add Python 3.9 to CI and test configs

* Update petstore example

samples/openapi3/client/features/dynamic-servers/python/.gitlab-ci.yml

@@ -10,9 +10,6 @@ stages:
    - pip install -r test-requirements.txt
    - pytest --cov=dynamic_servers
 
-test-3.5:
-  extends: .tests
-  image: python:3.5-alpine
 test-3.6:
   extends: .tests
   image: python:3.6-alpine
@@ -22,3 +19,6 @@ test-3.7:
 test-3.8:
   extends: .tests
   image: python:3.8-alpine
+test-3.9:
+  extends: .tests
+  image: python:3.9-alpine

samples/openapi3/client/features/dynamic-servers/python/.travis.yml

@@ -1,10 +1,10 @@
 # ref: https://docs.travis-ci.com/user/languages/python
 language: python
 python:
-  - "3.5"
   - "3.6"
   - "3.7"
   - "3.8"
+  - "3.9"
 # command to install dependencies
 install:
   - "pip install -r requirements.txt"

samples/openapi3/client/features/dynamic-servers/python/README.md

@@ -9,7 +9,7 @@ This Python package is automatically generated by the [OpenAPI Generator](https:
 
 ## Requirements.
 
-Python >= 3.5
+Python >= 3.6
 
 ## Installation & Usage
 ### pip install

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/__init__.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 # flake8: noqa
 
 """

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/api/usage_api.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
     OpenAPI Extension with dynamic servers
 

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/api_client.py

@@ -1,4 +1,3 @@
-# coding: utf-8
 """
     OpenAPI Extension with dynamic servers
 

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/apis/__init__.py

@@ -1,4 +1,3 @@
-# coding: utf-8
 
 # flake8: noqa
 

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/configuration.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
     OpenAPI Extension with dynamic servers
 

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/exceptions.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
     OpenAPI Extension with dynamic servers
 

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/model_utils.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
     OpenAPI Extension with dynamic servers
 

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/models/__init__.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 # flake8: noqa
 
 # import all models into this package

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/rest.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
     OpenAPI Extension with dynamic servers
 

samples/openapi3/client/features/dynamic-servers/python/setup.py

@@ -1,5 +1,3 @@
-# coding: utf-8
-
 """
     OpenAPI Extension with dynamic servers
 
@@ -36,7 +34,7 @@ setup(
     author_email="team@openapitools.org",
     url="",
     keywords=["OpenAPI", "OpenAPI-Generator", "OpenAPI Extension with dynamic servers"],
-    python_requires=">=3.5",
+    python_requires=">=3.6",
     install_requires=REQUIRES,
     packages=find_packages(exclude=["test", "tests"]),
     include_package_data=True,

samples/openapi3/client/features/dynamic-servers/python/test-requirements.txt

@@ -1,3 +1 @@
-pytest~=4.6.7 # needed for python 3.4
 pytest-cov>=2.8.1
-pytest-randomly==1.2.3 # needed for python 3.4