对一系列 pickle load 进行解包，只保留最后几个

with open(r'./record.pkl', 'rb') as inp:
    res = []  
    try:
        res.append(pickle.load(inp))
    except:
        noise_labels, true_labels = res[-2:]

有 bug, 但未测出来。

代码来源于 plot_loss_distribution.py

#         ## bug!
#        with open(r'./PN_CIFAR10/PN_CIFAR10_%.1f_loss_record/record_allrecord'%noise_rate, 'rb') as inp:
#            res = []  
#            try:
#                res.append(pickle.load(inp))
#            except:
#                print(res)
#                noise_labels, true_labels = res[-2:]
#        print(noise_labels)
#        print(true_labels)
#        print(len(res))
        
       with open(r'./PN_CIFAR10/PN_CIFAR10_%.1f_loss_record/record_allrecord'%noise_rate, 'rb') as inp:
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            _ = pickle.load(inp)
            
            #change in 2019.11.11
            noise_labels = pickle.load(inp)
            true_labels = pickle.load(inp)