python中def load_char_data(path, data_size=None,maxlen=35): df = pd.read_csv(path) p = df['sentence1'].values[0:data_size] h = df['sentence2'].values[0:data_size] label = df['label'].values[0:data_size].astype(int) p, h, label = shuffle(p, h, label) # [1,2,3,4,5] [4,1,5,2,0] p_c_index, h_c_index = char_index(p, h,maxlen=maxlen) return p_c_index, h_c_index, label返回的label是可迭代类型吗

python中p, h, y = load_char_data('./data/train.csv', data_size=None,maxlen=esim_params['input_shapes'][0][0])起到了什么作用

在Python中，p, h, y = load_char_data('./data/train.csv', data_size=None, maxlen=esim_params['input_shapes'][0][0]) 语句的作用是加载字符型数据，将数据集中的输入数据（p和h）以及标签数据（y）分别赋值给...

# 加载IMDB数据集 # (x_train, y_train), (x_test, y_test) = imdb.load_data(num_words=10000) data = pd.read_csv(r'D:\Users\lzm577\Desktop\dayta\movie_SSL.csv') print(data.head(10)) # 将序列填充到相同的长度 maxlen = 10000 training_samples = 7000 validation_samples = 3000 max_words = 10000 tokenizer = Tokenizer(num_words=max_words) tokenizer.fit_on_texts(data['text']) sequences = tokenizer.texts_to_sequences(data['text']) word_index = tokenizer.word_index print('Found %s unique tokens.' % len(word_index)) data = pad_sequences(sequences, maxlen=maxlen) labels = np.array(data[:, 1:]) print('Shape of data tensor:', data.shape) print('Shape of label tensor', labels.shape) indices = np.arange(data.shape[0]) np.random.shuffle(indices) data = data[indices] labels = labels[indices] x_train = data[:training_samples] y_train = labels[:training_samples] x_val = data[training_samples:training_samples+validation_samples] y_val = labels[training_samples:training_samples+validation_samples]

然后，读取一个csv文件并打印出前10行数据。接下来，将每个文本序列填充到相同的长度，并将序列转换为数字索引。使用Tokenizer类对文本进行标记化，将每个单词与一个唯一的整数相关联。此外，还计算了词汇表中的...

class DDPGAgent: def init(self, state_dim, action_dim, gamma=0.99, tau=0.01, lr_actor=1e-3, lr_critic=1e-3, memory_size=int(1e6), batch_size=128, warmup_steps=1000, noise_std=0.2, noise_min=0., hidden_size=128, num_layers=2): self.state_dim = state_dim self.action_dim = action_dim self.gamma = gamma self.tau = tau self.lr_actor = lr_actor self.lr_critic = lr_critic self.batch_size = batch_size self.steps = 50 self.warmup_steps = warmup_steps self.noise_std = noise_std self.noise_min = noise_min # 创建memory buffer用于存储经验回放记录 self.memory_buffer = deque(maxlen=memory_size) # 定义actor模型和target模型 self.actor = RnnModel(input_size=state_dim, hidden_size=hidden_size, num_layers=num_layers, output_size=action_dim).cuda() self.target_actor = RnnModel(input_size=state_dim, hidden_size=hidden_size, num_layers=num_layers, output_size=action_dim).cuda() self.target_actor.load_state_dict(self.actor.state_dict()) # 定义critic模型和target模型 self.critic = CriticNetwork(state_dim, action_dim) self.target_critic = CriticNetwork(state_dim, action_dim) self.target_critic.load_state_dict(self.critic.state_dict())

这是一个DDPG智能体的初始化函数，它有许多参数可以设置，包括状态空间、动作空间维度、强化学习的折扣因子、目标网络和实际网络之间的软更新率、演员网络和评论家网络的学习率、记忆库的大小、批量大小、热身步数、...

import matplotlib.pyplot as plt import tensorflow as tf from tensorflow import keras import numpy as np #加载IMDB数据 imdb = keras.datasets.imdb (train_data, train_labels), (test_data, test_labels) = imdb.load_data(num_words=100) print("训练记录数量：{}，标签数量：{}".format(len(train_data),len(train_labels))) print(train_data[0]) #数据标准化 train_data = keras.preprocessing.sequence.pad_sequences(train_data,value=0,padding='post',maxlen=256) #text_data = keras.preprocessing.sequence.pad_sequences(train_data,value=0,padding='post',maxlen=256) text_data = keras.preprocessing.sequence.pad_sequences(test_data,value=0,padding='post',maxlen=256) print(train_data[0]) #构建模型 vocab_size = 10000 model = tf.keras.Sequential([tf.keras.layers.Embedding(vocab_size, 64), tf.keras.layers.Bidirectional(tf.keras.layers.LSTM(64)), tf.keras.layers.Dense(64,activation='relu'), tf.keras.layers.Dense(1) ]) model.summary() #配置并训练模型 model.compile(optimizer='adam',loss='binary_crossentropy',metrics=['accuracy']) x_val = train_data[:10000] partial_x_train = train_data[10000:] y_val = train_labels[:10000] partial_y_train = train_labels[10000:] history = model.fit(partial_x_train,partial_y_train,epochs=1,batch_size=512,validation_data=(x_val,y_val),verbose=1) #测试性能 results = model.evaluate(test_data, test_labels, verbose=2) print(results) #训练过程可视化 history_dict = history.history print(history_dict.keys()) def plot_graphs(history, string): plt.plot(history.history[string]) plt.plot(history.history['val_'+string]) plt.xlabel("Epochs") plt.ylabel(string) plt.legend([string,'val_'+string]) plt.show() plot_graphs(history,"accuracy") plot_graphs(history,"loss")

这段代码使用了IMDB电影评论数据集，通过对评论进行情感分析，将评论分为正面或负面两类。其中，数据标准化使用了keras.preprocessing.sequence.pad_sequences函数，将每条评论的长度都设置为256，模型使用了嵌入层...

import pandas as pd data = pd.read_csv(C:\Users\Administrator\Desktop\pythonsjwj\weibo_senti_100k.csv') data = data.dropna(); data.shape data.head() import jieba data['data_cut'] = data['review'].apply(lambda x: list(jieba.cut(x))) data.head() with open('stopword.txt','r',encoding = 'utf-8') as f: stop = f.readlines() import re stop = [re.sub(' |\n|\ufeff','',r) for r in stop] data['data_after'] = [[i for i in s if i not in stop] for s in data['data_cut']] data.head() w = [] for i in data['data_after']: w.extend(i) num_data = pd.DataFrame(pd.Series(w).value_counts()) num_data['id'] = list(range(1,len(num_data)+1)) a = lambda x:list(num_data['id'][x]) data['vec'] = data['data_after'].apply(a) data.head() from wordcloud import WordCloud import matplotlib.pyplot as plt num_words = [''.join(i) for i in data['data_after']] num_words = ''.join(num_words) num_words= re.sub(' ','',num_words) num = pd.Series(jieba.lcut(num_words)).value_counts() wc_pic = WordCloud(background_color='white',font_path=r'C:\Windows\Fonts\simhei.ttf').fit_words(num) plt.figure(figsize=(10,10)) plt.imshow(wc_pic) plt.axis('off') plt.show() from sklearn.model_selection import train_test_split from keras.preprocessing import sequence maxlen = 128 vec_data = list(sequence.pad_sequences(data['vec'],maxlen=maxlen)) x,xt,y,yt = train_test_split(vec_data,data['label'],test_size = 0.2,random_state = 123) import numpy as np x = np.array(list(x)) y = np.array(list(y)) xt = np.array(list(xt)) yt = np.array(list(yt)) x=x[:2000,:] y=y[:2000] xt=xt[:500,:] yt=yt[:500] from sklearn.svm import SVC clf = SVC(C=1, kernel = 'linear') clf.fit(x,y) from sklearn.metrics import classification_report test_pre = clf.predict(xt) report = classification_report(yt,test_pre) print(report) from keras.optimizers import SGD, RMSprop, Adagrad from keras.utils import np_utils from keras.models import Sequential from keras.layers.core import Dense, Dropout, Activation from keras.layers.embeddings import Embedding from keras.layers.recurrent import LSTM, GRU model = Sequential() model.add(Embedding(len(num_data['id'])+1,256)) model.add(Dense(32, activation='sigmoid', input_dim=100)) model.add(LSTM(128)) model.add(Dense(1)) model.add(Activation('sigmoid')) model.summary() import matplotlib.pyplot as plt import matplotlib.image as mpimg from keras.utils import plot_model plot_model(model,to_file='Lstm2.png',show_shapes=True) ls = mpimg.imread('Lstm2.png') plt.imshow(ls) plt.axis('off') plt.show() model.compile(loss='binary_crossentropy',optimizer='Adam',metrics=["accuracy"]) model.fit(x,y,validation_data=(x,y),epochs=15)

2. 对csv文件中的review列进行分词处理，并过滤掉停用词。 3. 用词频统计生成词云图。 4. 将数据集划分为训练集和测试集，分别使用SVM和LSTM模型进行分类预测，并输出分类报告。具体流程如下： 1. 首先，使用...

if continue_flag == 1: q_online = torch.load('Result_discount=0.9_lr=0.0005_net') q_target = torch.load('Result_discount=0.9_lr=0.0005_net') buffer_save = np.load('Result_discount=0.9_lr=0.0005_buffer.npy', allow_pickle=True) memory.buffer = collections.deque(buffer_save.tolist(), maxlen=buffer_limit) reward_ave_list = np.load('Result_discount=0.9_lr=0.0005_reward.npy').tolist() loss_ave_list = np.load('Result_discount=0.9_lr=0.0005_loss.npy').tolist()

这段代码中，首先检查 continue_flag 是否等于 1。如果是，则加载模型和数据，以便继续训练或使用之前保存的结果。 - q_online = torch.load('Result_discount=0.9_lr=0.0005_net') 会加载之前训练好的神经网络...

class SmoothedValue(object): """Track a series of values and provide access to smoothed values over a window or the global series average. """ def init(self, window_size=20, fmt=None): if fmt is None: # "{value:.4f}"表示将变量"value"的值保留四位小数进行输出，"{global_avg:.4f}"表示将变量"global_avg"的值保留四位小数进行输出 fmt = "{value:.4f} ({global_avg:.4f})" self.deque = deque(maxlen=window_size) # deque简单理解成加强版list self.total = 0.0 # 记录累计的数值的总和 self.count = 0 # 记录所由累计的个数的总和 self.fmt = fmt def update(self, value, n=1): self.deque.append(value) self.count += n self.total += value * n

在初始化方法__init__中，它接受两个参数：window_size和fmt。window_size表示平滑窗口的大小，默认为20。fmt是一个格式化字符串，用于定义平滑值的输出格式，默认为"{value:.4f} ({global_avg:.4f})"。...

解释代码defrecognize_thread(self): self.max_len=int(self.record_seconds.get()) self.q=queue.Queue(maxsize=2) self.data_deque=deque(maxlen=self.max_len) ifnotself.recognizing: self.recognizing=True self.recognize_real_button.config(text="结束声纹识别") threading.Thread(target=self.recognize_real).start() threading.Thread(target=self.record_real).start() else: self.recognizing=False self.recognize_real_button.config(text="实时声纹识别")

同时，该方法还创建了一个双向队列（deque）对象self.data_deque，用于存储最近self.max_len秒内的声音数据。接下来，该方法检查是否正在进行声纹识别，如果没有，则将self.recognizing设置为True，表示开始...

import numpy as np from keras.preprocessing import sequence from keras_preprocessing import sequence from keras.models import Sequential from keras.layers.core import Dense, Dropout, Activation from tensorflow.python.keras.layers.embeddings import Embedding from keras.layers import LSTM import sklearn import pickle # from sklearn.cross_validation import train_test_split import sklearn.model_selection from sklearn.model_selection import train_test_split from keras.models import load_model def build_model(max_features=1, maxlen=65): """Build LSTM model""" model = Sequential() model.add(Embedding(max_features, 128, input_length=maxlen)) model.add(LSTM(128)) model.add(Dropout(0.5)) model.add(Dense(1)) model.add(Activation('sigmoid')) # model.add(tf.keras.layers.BatchNormalization()) model.compile(loss='binary_crossentropy', optimizer='rmsprop') return model def data(Domain): valid_chars = pickle.load(open('dictionary.plk','rb')) Domain = [[valid_chars[y] for y in x] for x in Domain] Domain = sequence.pad_sequences(Domain, maxlen=65) return Domain def run(Domain): Domains=data(Domain) model = build_model() model.load_weights('Mymodel.h5') predictions = model.predict(Domains) return predictions if name == "main": print(run(['baidu.com'])) # Run with 1 to make it fast

这段代码是一个使用 LSTM 模型对域名进行分类的程序，其中包括了模型的构建和加载，以及对数据进行预处理和预测。具体来说，该程序使用了 Keras 和 TensorFlow 库进行模型的建立和训练，同时使用了 pickle 库进行...

解释代码classVoiceRecognitionGUI: definit(self,master): master.title("夜雨飘零声纹识别") master.geometry('400x200') self.max_len=3 self.recognizing=False self.q=queue.Queue(maxsize=2) self.data_deque=deque(maxlen=self.max_len) self.record_audio=RecordAudio()

这段代码是一个Python类的构造函数。它接受一个参数master，用于创建一个GUI界面窗口。窗口标题为“夜雨飘零声纹识别”，大小为400x200像素。类中还定义了一些实例变量： - self.max_len=3：用于设置一个...

(train_data, train_labels), (test_data, test_labels) = imdb.load_data(num_words=10000) print("训练记录数量：{}, 标签数量：{}".format(len(train_data), len(train_labels))) print(train_data[0]) train_data = keras.preprocessing.sequence.pad_sequences(train_data, value=0, padding='post', maxlen=256) test_data = keras.preprocessing.sequence.pad_sequences(test_data, value=0, padding='post', maxlen=256) print(train_data[0])

- train_data 和 test_data 是整数列表，表示电影评论中单词的索引。每个单词都有一个唯一的整数编号，表示其在词汇表中的位置。 - train_labels 和 test_labels 是 0 和 1 的整数列表，其中 0 表示负面评论...

tokenizer = Tokenizer(num_words=max_words) tokenizer.fit_on_texts(data['text']) sequences = tokenizer.texts_to_sequences(data['text']) word_index = tokenizer.word_index print('Found %s unique tokens.' % len(word_index)) data = pad_sequences(sequences,maxlen=maxlen) labels = np.array(data[:,:1]) print('Shape of data tensor:',data.shape) print('Shape of label tensor',labels.shape) indices = np.arange(data.shape[0]) np.random.shuffle(indices) data = data[indices] labels = labels[indices] x_train = data[:traing_samples] y_train = data[:traing_samples] x_val = data[traing_samples:traing_samples+validation_samples] y_val = data[traing_samples:traing_samples+validation_samples] model = Sequential() model.add(Embedding(max_words,100,input_length=maxlen)) model.add(Flatten()) model.add(Dense(32,activation='relu')) model.add(Dense(10000,activation='sigmoid')) model.summary() model.compile(optimizer='rmsprop', loss='binary_crossentropy', metrics=['acc']) history = model.fit(x_train,y_train, epochs=1, batch_size=128, validation_data=[x_val,y_val]) import matplotlib.pyplot as plt acc = history.history['acc'] val_acc = history.history['val_acc'] loss = history.history['loss'] val_loss = history.history['val_loss'] epoachs = range(1,len(acc) + 1) plt.plot(epoachs,acc,'bo',label='Training acc') plt.plot(epoachs,val_acc,'b',label = 'Validation acc') plt.title('Training and validation accuracy') plt.legend() plt.figure() plt.plot(epoachs,loss,'bo',label='Training loss') plt.plot(epoachs,val_loss,'b',label = 'Validation loss') plt.title('Training and validation loss') plt.legend() plt.show() max_len = 10000 x_train = keras.preprocessing.sequence.pad_sequences(x_train, maxlen=max_len) x_test = data[10000:,0:] x_test = keras.preprocessing.sequence.pad_sequences(x_test, maxlen=max_len) # 将标签转换为独热编码 y_train = np.eye(2)[y_train] y_test = data[10000:,:1] y_test = np.eye(2)[y_test]

这段代码中存在几个问题： 1. labels 的赋值有误。应该是 labels = np.array(data[:, 1:])，因为标签是从第二列开始的。 2. validation_data 的格式有误。应该是 validation_data=(x_val, y_val)，而不是 ...

import tensorflow as tf from tensorflow import keras import numpy as np # 加载 IMDB 数据集 imdb = keras.datasets.imdb (train_data, train_labels), (test, test_labels) = imdb.load_data(num_words=00) # 将整数序列填充为相同的长度 train_data = keras.preprocessing.sequence.pad_sequences(train_data, value=0, padding='post', maxlen=256) test_data = keras.preprocessing.sequence.pad_sequences(test_data, value=0, padding='post', maxlen=256) # 构建模型 model = keras.Sequential() model.add(keras.layers.Embed(10000, 16)) model.add(keras.layers.GlobalAveragePooling1D()) model.add(keras.layers(16, activation=tf.nn.relu)) model.add(keras.layers.Dense(1, activation=tf.sigmoid)) # 编译模型 model.compile(optimizer='adam', loss='binary_crossentropy', metrics=['accuracy']) # 训练模型 history = model.fit(train_data, train_labels, epochs=40, batch_size=512, validation_data=(test_data, test_labels), verbose=1) # 在测试数据上评估模型 results = model.evaluate(test_data, test_labels) print('Test loss:', results[0]) print('Test accuracy:', results[1])test_data = keras.preprocessing.sequence.pad_sequences(test_data, value=0, padding='post', maxlen=256) NameError: name 'test_data' is not defined

(train_data, train_labels), (test_data, test_labels) = imdb.load_data(num_words=10000) # 将整数序列填充为相同的长度 maxlen = 256 train_data = keras.preprocessing.sequence.pad_sequences(train_data, ...

import tensorflow as tf from tensorflow import keras import numpy as np # 加载 IMDB 数据集 imdb = keras.datasets.imdb (train_data, train_labels), (test_data, test_labels) = imdb.load_data(num_words=10000) # 将整数序列填充为相同的长度 maxlen = 256 train_data = keras.preprocessing.sequence.pad_sequences(train_data, value=0, padding='post', maxlen=maxlen) test_data = keras.preprocessing.sequence.pad_sequences(test_data, value=0, padding='post', maxlen=maxlen) # 构建模型 model = keras.Sequential() model.add(keras.layers.Embedding(10000, 16)) model.add(keras.layers.GlobalAveragePooling1D()) model.add(keras.layers.Dense(16, activation=tf.nn.relu)) model.add(keras.layers.Dense(1, activation=tf.sigmoid)) # 编译模型 model.compile(optimizer='adam', loss='binary_crossentropy', metrics=['accuracy']) # 训练模型 history = model.fit(train_data, train_labels, epochs=40, batch_size=512, validation_data=(test_data, test_labels), verbose=1) # 在测试数据上评估模型 results = model.evaluate(test_data, test_labels) print('Test loss:', results[0]) print('Test accuracy:', results[1])优化代码

(train_data, train_labels), (test_data, test_labels) = keras.datasets.imdb.load_data(num_words=10000) # 将整数序列填充为相同的长度 maxlen = 256 train_data = keras.preprocessing.sequence.pad_sequences...

Python队列实战：FIFO数据结构与collections deque应用

在Python算法应用实战中，队列作为一种重要的数据结构，其基本原理遵循先进先出（FIFO）策略。队列广泛应用于各种场景，例如操作系统进程调度、打印任务管理、仿真系统中的顾客排队等，它的核心特点是数据按照添加的...

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python中p, h, y = load_char_data('./data/train.csv', data_size=None,maxlen=esim_params['input_shapes'][0][0])起到了什么作用

解释代码classVoiceRecognitionGUI: def__init__(self,master): master.title("夜雨飘零声纹识别") master.geometry('400x200') self.max_len=3 self.recognizing=False self.q=queue.Queue(maxsize=2) self.data_deque=deque(maxlen=self.max_len) self.record_audio=RecordAudio()

Python队列实战：FIFO数据结构与collections deque应用

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解释代码classVoiceRecognitionGUI: definit(self,master): master.title("夜雨飘零声纹识别") master.geometry('400x200') self.max_len=3 self.recognizing=False self.q=queue.Queue(maxsize=2) self.data_deque=deque(maxlen=self.max_len) self.record_audio=RecordAudio()

蓄电池与超级电容混合储能并网matlab simulink仿真模型（1）混合储能采用低通滤波器进行功率分配，可有效抑制功率波动，并对超级电容的soc进行能量管理，soc较高时多放电，较低时少放电