[python] Fix sample code template in README (#27)

Author: EltonChou

modules/openapi-json-schema-generator/src/main/resources/python/README_common.handlebars

@@ -6,7 +6,7 @@ from pprint import pprint
 {{#with apiInfo}}
 {{#each apis}}
 {{#if @first}}
-from {{packageName}}.{{apiPackage}} import {{classFilename}}
+from {{packageName}}.{{apiPackage}}.tags import {{classFilename}}
 {{#each imports}}
 {{{import}}}
 {{/each}}

samples/openapi3/client/3_0_3_unit_test/python/README.md

@@ -140,7 +140,7 @@ Please follow the [installation procedure](#installation--usage) and then run th
 import time
 import unit_test_api
 from pprint import pprint
-from unit_test_api.apis import ref_api
+from unit_test_api.apis.tags import ref_api
 from unit_test_api.model.property_named_ref_that_is_not_a_reference import PropertyNamedRefThatIsNotAReference
 from unit_test_api.model.ref_in_additionalproperties import RefInAdditionalproperties
 from unit_test_api.model.ref_in_allof import RefInAllof

samples/openapi3/client/features/nonCompliantUseDiscriminatorIfCompositionFails/python/README.md

@@ -140,7 +140,7 @@ Please follow the [installation procedure](#installation--usage) and then run th
 import time
 import this_package
 from pprint import pprint
-from this_package.apis import default_api
+from this_package.apis.tags import default_api
 from this_package.model.operator import Operator
 # Defining the host is optional and defaults to http://localhost:3000
 # See configuration.py for a list of all supported configuration parameters.

samples/openapi3/client/petstore/python/README.md

@@ -140,7 +140,7 @@ import datetimeimport datetimeimport datetimeimport datetimeimport datetimeimpor
 import time
 import petstore_api
 from pprint import pprint
-from petstore_api.apis import another_fake_api
+from petstore_api.apis.tags import another_fake_api
 from petstore_api.model.client import Client
 # 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.