Pick Matching lines with list of keywords
#Simple code to find the occurrence of list of search terms in single line in a huge file. Search_terms = [ 'A' , 'B' , 'C' , 'D' ] with open ( 'BigFile.txt' , 'r' ) as infile : entries = infile . read () each_line = entries . splitlines () new_list = [] for ix , row in enumerate ( each_line ): element = row . split ( "\t" ) if set ( Search_terms ) == set ( element ): #Use <= if you want no strict option new_list . append ( element ) print ix + 1 #List the matching line number ! thefile = open ( 'Output.txt' , 'w' ) for item in new_list : print >> thefile , item