add after_script for python (#8852)

specification/redhatopenshift/resource-manager/readme.md

@@ -50,6 +50,8 @@ This is not used by Autorest itself.
 ```yaml $(swagger-to-sdk)
 swagger-to-sdk:
   - repo: azure-sdk-for-python
+    after_scripts:
+      - python ./scripts/multiapi_init_gen.py azure-mgmt-redhatopenshift
   - repo: azure-sdk-for-go
 ```
 
@@ -61,7 +63,7 @@ See configuration in [readme.go.md](./readme.go.md)
 
 See configuration in [readme.python.md](./readme.python.md)
 
-## Multi-API/Profile support for AutoRest v3 generators 
+## Multi-API/Profile support for AutoRest v3 generators
 
 AutoRest V3 generators require the use of `--tag=all-api-versions` to select api files.
 
@@ -77,11 +79,11 @@ input-file:
 
 ```
 
-If there are files that should not be in the `all-api-versions` set, 
+If there are files that should not be in the `all-api-versions` set,
 uncomment the  `exclude-file` section below and add the file paths.
 
 ``` yaml $(tag) == 'all-api-versions'
-#exclude-file: 
+#exclude-file:
 #  - $(this-folder)/Microsoft.Example/stable/2010-01-01/somefile.json
 ```