读写CSV文件

一、使用CSV模块读写文件，参数delimiter指定分隔类型，默认","分隔

二、参数newline保证写入的文件没有空行

三、实例：

import csv
with open("book_in.csv", encoding='utf8') as rf:
    reader = csv.reader(rf, delimiter=' ')
    headers = next(reader)
    with open("book_out.csv", 'w', encoding='utf8', newline='') as wf:
        writer = csv.writer(wf, delimiter=' ')
        writer.writerow(headers)
        for book in reader:
            print(book)
            price = book[-2]
            if price and float(price) >= 80.00:
                writer.writerow(book)