如何以String格式读取Kafka的数据？
我有一个实现，使用SimpleStringSchema()将事件读取为byte[]，但我找不到将数据读取为 Properties properties = new Properties();
properties.setProperty("bootstrap.servers", "kafka1:9092");
properties.setProperty("zookeeper.connect", "zookeeper1:2181");
properties.setProperty("group.id", "test");
properties.setProperty("key.deserializer","org.apache.kafka.common.serialization.StringDeserializer");
properties.setProperty("value.deserializer", "org.apache.kafka.common.serialization.ByteArrayDeserializer");
properties.setProperty("auto.offset.reset", "earliest");
DataStream<byte[]> stream = env
.addSource(new FlinkKafkaConsumer010<byte[]>("testStr", ? ,properties));
的架构。
这是我的代码：
import pandas as pd
import matplotlib.pyplot as plt
df = pd.read_csv('train.csv')
df_grouped = df.groupby(['Survived','Sex','Pclass'])['Survived'].count()
df_grouped.unstack().plot(kind='bar',stacked=True, colormap='Blues', grid=True, figsize=(13,5));