parse_fasta.py

def parse_fasta(filepath: str) -> Generator[str, str]:
    seq_id = ""
    with open(filepath, "r") as h:
        seq_id = ""
        seq = ""
        for i in h:
            if i[0] == ">":
                if seq_id:
                    yield (seq_id, seq)
                seq_id = i[1:].strip()
                seq = ""
            else:
                seq += i.strip()
        yield (seq_id, seq)