Doubts about bioprogramming

Question

[Maria Eduarda]

I am having doubts about this exercise (at the point of creating a fasta file)

Create a program that creates three fasta sequences and writes them to a file, using the write method. The DNA sequence must be capitalized and without the characters (-)

[iraun]

Hi! Try using string.upper() for uppercase conversion and string.replace('-', '') to remove - characters. It might be useful if you share your code, and the error you are getting or the specific point where you are getting stuck :).

[JC]

the fasta format is described here https://en.wikipedia.org/wiki/FASTA_format

[Giovanni M Dall'Olio]

What is your doubt? What have you tried?