How to use the spacepy.toolbox.savepickle function in spacepy

try:
                Lstar[qual].extend(data[alpha]['Lstar'])
            except TypeError:
                Lstar[qual].append(data[alpha]['Lstar'].tolist())
        print('Did [-%d,0,0] for all qualities' % rval)
        #make plots
        fstr = '%d1%d' % (len(rvals), rval-rvals[0]+1)
        ax = fig.add_subplot(fstr)
        ax.boxplot(Lstar)
        #ax = plt.gca()
        ax.set_title('LGM - Centred dipole [-%d, 0, 0]$_{SM}$; PA=%d$^{o}$' % (rval, alpha))
        ax.set_ylabel('L* (LanlGeoMag)')
        ax.set_xlabel('Quality Flag')
        ax.set_xticklabels([str(n) for n in range(5)])
        
        tb.savepickle('lgm_cdip_lstar%d_alpha%d.pkl' % (rval, alpha), {'Lstar': Lstar})
    
        plt.ylim([rval-0.04, rval+0.04])
        plt.savefig('lgm_cdip_verify%d.png' % alpha, dpi=300)
    ##fig.savefig('lgm_cdip_verify%d_zoom.png' % alpha, dpi=300)