biotite.sequence.io.fasta.get_sequence¶

biotite.sequence.io.fasta.get_sequence(fasta_file, header=None)[source]

Get a sequence from a FastaFile instance.

Parameters: fasta_file : FastaFile The FastaFile to be accessed. header : str, optional The header to get the sequence from. By default, the first sequence of the file is returned. sequence : NucleotideSequence or ProteinSequence The first sequence in the FastaFile. NucleotideSequence if the sequence string fits the corresponding alphabet, ProteinSequence otherwise. ValueError If the sequence data can be neither converted into a NucleotideSequence nor a ProteinSequence.