利用Python如何将数据写到CSV文件中

# 读取csv文件
import csv
with open('some.csv', 'rb') as f: # 采用b的方式处理可以省去很多问题
reader = csv.reader(f)
for row in reader:
# do something with row, such as row[0],row[1]


import csv
with open('some.csv', 'wb') as f: # 采用b的方式处理可以省去很多问题
writer = csv.writer(f)
writer.writerows(someiterable)

import csv
import codecs
# codecs 是自然语言编码转换模块

fileName = 'PythonBook.csv'

# 指定编码为 utf-8, 避免写 csv 文件出现中文乱码
with codecs.open(fileName, 'w', 'utf-8') as csvfile:
 # 指定 csv 文件的头部显示项
 filednames = ['书名', '作者']
 writer = csv.DictWriter(csvfile, fieldnames=filednames)

 books = []
 book = {
 'title': '笑傲江湖',
 'author': '金庸',
 }
 books.append(book)

 writer.writeheader()
 for book in books:
 try:
 writer.writerow({'书名':book['title'], '作者':book['author']})
 except UnicodeEncodeError:
 print("编码错误, 该数据无法写到文件中, 直接忽略该数据")

import pandas as pd

fileName = 'PythonBook.csv'
number = 1

books = []
book = {
 'title': '笑傲江湖',
 'author': '金庸',
}
# 如果 book 条数足够多的话，pandas 会每次往文件中写 50 条数据。
books.append(book)

data = pd.DataFrame(books)
# 写入csv文件,'a+'是追加模式
try:
 if number == 1:
 csv_headers = ['书名', '作者']
 data.to_csv(fileName, header=csv_headers, index=False, mode='a+', encoding='utf-8')
 else:
 data.to_csv('fileName, header=False, index=False, mode='a+', encoding='utf-8')
 number = number + 1
except UnicodeEncodeError:
 print("编码错误, 该数据无法写到文件中, 直接忽略该数据")