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[Music] hello friends welcome to rajasthan engineering in this video i am going to explain one of the important and more useful function input file name this is part of spark pi spark inbuilt function what is the use of this function this function is basically used to identify the input file name for each record that got created in the data frame lets say you are creating a data frame by reading reading a folder within the folder we are having hundreds or thousands of files and later while exploring the data frame you come to know there is a problem with one particular record now you have to trace it back through which file this particular corrupt record got produced so that you can take some action so for that you know manually we cannot go through several folders and several files now we cannot manually open and check instead of that we can use input file name so while creating the data frame along with the actual data it will capture the input file name also this function is mainl