How to remove part file name and save output to single file with custom file name using Pyspark

Hi Everyone,
In this video I have covered how you can create one single file with custom file name from Partition file which is getting created after writing your dataframe.
If you write your dataframe its going to create one or more partitionfile along with supportive files we are going to take that part file and going to create only one single file with custom file name in Pyspark /Databricks