Necesary changes for the PR acceptance

Author: urtzai

README.rst

@@ -158,6 +158,17 @@ Performing exports with celery
 6. Click on the link near the bottom of the page titled `Exported file`.
 
 
+Excluding export file formats in the admin site
+-----------------------------------------------
+
+All available file formats to export are taken from the `Tablib project <https://pypi.org/project/tablib/>`.
+
+To exclude or disable file formats from the admin site, configure `IMPORT_EXPORT_CELERY_EXCLUDED_FORMATS` django settings variable. This variable is a list of format strings written in lower case.
+
+    ::
+
+        IMPORT_EXPORT_CELERY_EXCLUDED_FORMATS = ["csv", "xls"]
+
 
 Customizing email template for export job completion email
 ----------------------------------------------------------
@@ -186,7 +197,7 @@ The email template will get some context variables that you can use to customize
 
 
     ::
-        
+
         {
             export_job: The current instance of ExportJob model
             app_label: export_job.app_label

import_export_celery/utils.py

@@ -9,9 +9,9 @@
 DEFAULT_EXPORT_JOB_COMPLETION_MAIL_TEMPLATE = (
     "email/export_job_completion.html"
 )
-EXCLUDED_EXPORT_FORMATS = getattr(
+IMPORT_EXPORT_CELERY_EXCLUDED_FORMATS = getattr(
     settings,
-    "EXCLUDED_EXPORT_FORMATS",
+    "IMPORT_EXPORT_CELERY_EXCLUDED_FORMATS",
     [],
 )
 
@@ -21,7 +21,7 @@ def get_formats():
         format
         for format in DEFAULT_FORMATS
         if format.TABLIB_MODULE.split(".")[-1].strip("_")
-        not in EXCLUDED_EXPORT_FORMATS
+        not in IMPORT_EXPORT_CELERY_EXCLUDED_FORMATS
     ]