Question

我的数据有错字。特别是，我需要将pandas DataFrame的列值从字符串转换为float。但是，简单的constructor(message: string) { this.greeting = message; } @validate greet(@required name: string) { return "Hello " + name + ", " + this.greeting; }无法引发此错误：

float(value)

因此，我应用正则表达式删除所有非数字：

"could not convert string to float: '33q.200088'"

但是，在以下情况下，我得到了错误re.sub(r"\D", "", num)：

TypeError: expected string or bytes-like object

重要提示：我想保持num = -97.94111109999999的标志。

Answer 1

此代码应使其起作用：

---
version: '2'

services:
  zookeeper:
    image: confluentinc/cp-zookeeper:5.0.0
    hostname: zookeeper
    ports:
      - '32181:32181'
    environment:
      ZOOKEEPER_CLIENT_PORT: 32181
      ZOOKEEPER_TICK_TIME: 2000
    extra_hosts:
      - "moby:127.0.0.1"

  kafka:
    image: confluentinc/cp-kafka:5.0.0
    hostname: kafka
    ports:
      - '9092:9092'
      - '29092:29092'
    depends_on:
      - zookeeper
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:32181
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: "false"
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
    extra_hosts:
      - "moby:127.0.0.1"

  schema-registry:
    image: confluentinc/cp-schema-registry:5.0.0
    hostname: schema-registry
    depends_on:
      - zookeeper
      - kafka
    ports:
      - '8081:8081'
    environment:
      SCHEMA_REGISTRY_HOST_NAME: schema-registry
      SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: zookeeper:32181
    extra_hosts:
      - "moby:127.0.0.1"

Answer 2

num是签名的float类型，而不是string或bytes

re.sub("[a-zA-Z]", "", str(num))

这将返回一个保留-和.的stringType

您应该可以将其转换为float

如何解决TypeError：预期的字符串或类似字节的对象

2 个答案: