def extract_hairpin_name_and_sequence(file,sampleName):
    """
    Reads one MIRNA cluster file
    It returns the corresponding cluster name and hairpin sequence in a Python dictionary
    Dictionary keys: cluster names
    Dictionary values: cluster sequences
    """
    with open(file,"r") as filin:
        lines = filin.readlines()
        clusterName = lines[0].split(" ")[0].strip()
        hairpinSequence = lines[2].strip()
        d = {clusterName:hairpinSequence}
        return d