[Python experimental] Readme improvements (#6031)

* Python experimental readme improvements

* Python experimental readme improvements

* execute scripts in bin directory

samples/client/petstore/python-asyncio/docs/FakeApi.md

@@ -35,6 +35,12 @@ 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:
@@ -90,6 +96,12 @@ 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:
@@ -145,6 +157,12 @@ 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:
@@ -200,6 +218,12 @@ 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:
@@ -255,6 +279,12 @@ 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:
@@ -310,6 +340,12 @@ 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:
@@ -362,6 +398,12 @@ 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:
@@ -418,6 +460,12 @@ 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:
@@ -475,13 +523,22 @@ 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:
@@ -564,6 +621,12 @@ 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:
@@ -634,6 +697,12 @@ 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:
@@ -697,6 +766,12 @@ 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:
@@ -750,6 +825,12 @@ 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:
@@ -807,6 +888,12 @@ 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: