script to Extract longest isoform from stringTie assembly

Question

[Bioinfonext]

I have done genome guided assembly using StringTie. In the output fasta header contain: Isoform name and then gene name.

I want extract longest sequence based on gene name.

fasta file header:

STRG.3.1 gene=STRG.3

TCTCATTATT

STRG.3.2 gene=STRG.3

TCTCATTATTGTCTT

Both isoforms belongs to same gene STRG3.

I want to extract the longest isofrom.

Thanks

[GenoMax]

Please search Biostars (using a google search). It will save you having to ask these types of questions: How to extract the longest isoform from multi fasta file

[Enhancer]

I don't think this said link solved the problem based on some feedback I have seen on it