May-28-2021, 12:48 PM
(May-27-2021, 06:53 PM)perfringo Wrote: What is exact meaning of 'find a string with the letters ATGC only in uppercase'. Does it mean 'determine whether line contains word constructed only from letters ATGC in any combination'? Or same applied to the whole file? And finally - do you have to use re? Line #2 in your code reminds me one old programmering joke: regex in plural is regrets.
It means that one of the letters(ATGC - just one) appears in columns 4 and 5
and yes, sadly I have to use regex