working with csv files introduction this introduces module that supports the generation of csv (or comma separated valuesfiles csv files the csv (comma separated valuesformat is the most common import and export format for spreadsheets and databases howevercsv is not precise standard with multiple different applications having different conventions and specific standards the python csv module implements classes to read and write tabular data in csv format as part of this it supports the concept of dialect which is csv format used by specific application or suite of programsfor exampleit supports an excel dialect this allows programmers to say"write this data in the format preferred by excel,or "read data from this file which was generated by excel,without knowing the precise details of the csv format used by excel programmers can also describe the csv dialects understood by other applications or define their own special-purpose csv dialects the csv module provides range of functions includingcsv reader (csvfiledialect='excel'**fmtparamsreturns reader object which will iterate over lines in the given csvfile an optional dialect parameter can be given this may be an instance of subclass of the dialect class or one of the strings returned by the list_dialects(function the other optional fmtparams keyword arguments can be given to override individual formatting parameters in the current dialect (cspringer nature switzerland ag huntadvanced guide to python programmingundergraduate topics in computer science