I have a bunch of sequences created with `Roary` which I want to preprocess. When I read the sequences (genomics data) I want to translate them to protein sequences using:

    import pandas as pd
    from Bio.Seq import Seq
    from Bio import SeqIO
    
    def read_fasta_file(fn):
        with open(fn,'r') as file:
            fasta_sequences = SeqIO.parse(file, 'fasta')
            sequences = pd.DataFrame([{
                'filename': basename(fn),
                'id': rec.id,
                'seq': str(rec.seq.translate())} for rec in fasta_sequences])
        return sequences

The problem is that `.translate()` fails with:

> TranslationError: Codon 'T--' is invalid

Is there a build-in function to ignore the dashes?