def dump_netrc(self):
    """Dump the class data in the format of a .netrc file."""
    rep = ''
    for host in self.hosts.keys():
        attrs = self.hosts[host]
        rep = rep + 'machine ' + host + '\n\tlogin ' + str(attrs[0]) + '\n'
        if attrs[1]:
            rep = rep + 'account ' + str(attrs[1])
        rep = rep + '\tpassword ' + str(attrs[2]) + '\n'
    for macro in self.macros.keys():
        rep = rep + 'macdef ' + macro + '\n'
        for line in self.macros[macro]:
            rep = rep + line
        rep = rep + '\n'
    return rep
Dump the class data in the format of a .netrc file.