Write a script to extract specific data in csv output from csv input using python

Question

Input csv input: date,process,host,log,bytes

20200206,aa_tms_2,aa01,0312-aa_tms_2.log.gz,31300000 
20200206,gtag_tms_1,gtag02,0123-gtag_tms_1.log.gz,58900000