<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_first_transcript_name(fasta_file):
 """Return the first FASTA sequence from the given FASTA file. Keyword arguments: fasta_file -- FASTA format file of the transcriptome """

    with open_pysam_file(fname=fasta_file, ftype='fasta') as f:
        transcript_name = f.references[0]
    return transcript_name