[Python experimental] Readme improvements (#6031)

* Python experimental readme improvements

* Python experimental readme improvements

* execute scripts in bin directory

samples/openapi3/client/petstore/python/docs/FakeApi.md

@@ -33,6 +33,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -85,6 +91,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -140,6 +152,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -195,6 +213,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -250,6 +274,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -305,6 +335,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -357,6 +393,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -413,6 +455,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -470,13 +518,22 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
-configuration = petstore_api.Configuration()
-# Configure HTTP basic authorization: http_basic_test
-configuration.username = 'YOUR_USERNAME'
-configuration.password = 'YOUR_PASSWORD'
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
 
-# Defining host is optional and default to http://petstore.swagger.io:80/v2
-configuration.host = "http://petstore.swagger.io:80/v2"
+# The client must configure the authentication and authorization parameters
+# in accordance with the API server security policy.
+# Examples for each auth method are provided below, use the example that
+# satisfies your auth use case.
+
+# Configure HTTP basic authorization: http_basic_test
+configuration = petstore_api.Configuration(
+    username = 'YOUR_USERNAME',
+    password = 'YOUR_PASSWORD'
+)
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
@@ -559,6 +616,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -630,12 +693,21 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
-configuration = petstore_api.Configuration()
-# Configure Bearer authorization (JWT): bearer_test
-configuration.access_token = 'YOUR_BEARER_TOKEN'
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
 
-# Defining host is optional and default to http://petstore.swagger.io:80/v2
-configuration.host = "http://petstore.swagger.io:80/v2"
+# The client must configure the authentication and authorization parameters
+# in accordance with the API server security policy.
+# Examples for each auth method are provided below, use the example that
+# satisfies your auth use case.
+
+# Configure Bearer authorization (JWT): bearer_test
+configuration = petstore_api.Configuration(
+    access_token = 'YOUR_BEARER_TOKEN'
+)
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
@@ -699,6 +771,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -752,6 +830,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client:
@@ -809,6 +893,12 @@ import time
 import petstore_api
 from petstore_api.rest import ApiException
 from pprint import pprint
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = petstore_api.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
 
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient() as api_client: