Python实现读取及写入csv文件的方法示例

# coding:utf-8import csv# 读取csv文件方式1csvFile = open("csvData.csv", "r")reader = csv.reader(csvFile) # 返回的是迭代类型data = []for item in reader:  print(item)  data.append(item)print(data)csvFile.close()# 读取csv文件方式2with open("csvData.csv", "r") as csvfile:  reader2 = csv.reader(csvfile) # 读取csv文件，返回的是迭代类型  for item2 in reader2:    print(item2)csvFile.close()# 从列表写入csv文件csvFile2 = open('csvFile2.csv','w', newline='') # 设置newline，否则两行之间会空一行writer = csv.writer(csvFile2)m = len(data)for i in range(m):  writer.writerow(data[i])csvFile2.close()# 从字典写入csv文件dic = {'张三':123, '李四':456, '王二娃':789}csvFile3 = open('csvFile3.csv','w', newline='')writer2 = csv.writer(csvFile3)for key in dic:  writer2.writerow([key, dic[key]])csvFile3.close()