writer.writerows([["index","a_name","b_name"],[0,1,3],[1,2,3],[2,3,4]]) 内容为 index,a_name,b_name0,1,31,2,32,3,4 读取csv文件用reader #coding=utf-8import csv with open("test.csv","r")ascsvfile: reader=csv.reader(csvfile) #这里不需要readlinesforlineinreader: print...
with open("/路径/文件名.csv","w") as csvfile: #'w'表示写操作,有则修改,无则新建 write=csv.writer(csvfile) write.writerow(data) #写入一行操作,data为可迭代类型,如果为字符串,则单个字符为一个元素 write.writerows(data) #写入多行操作,data中一个元素为一行 1. 2. 3. 4. 5. 6. 7. ...
#写入多行用writerows writer.writerows([[0,1,3],[1,2,3],[2,3,4]]) index a_name b_name0 1 3 1 2 3 2 3 4 读取csv文件用reader importcsvwithopen("test.csv","r")ascsvfile: reader = csv.reader(csvfile)#这里不需要readlinesforlineinreader:printline...
并在【一班成绩单.csv】文件写入了2个字典里的内容。 打开【一班成绩单.csv】文件,我们发现CSV文件行与行之间多了一行空行。 1.有空行 这是因为newline参数在作妖。 在open或with open语句中,参数newline表示用于区分换行符,只对文本模式有效,可以取的值有None,\n,\r。 意思就是在open或with open语句中,...
import csv import sys input_file = sys.argv[1] output_file = sys.argv[2] my_columns = [0, 3] with open(input_file, 'r', newline='') as csv_in_file: with open(output_file, 'w', newline='') as csv_out_file: filereader = csv.reader(csv_in_file) ...
In this article we show how to read and write CSV data with Python csv module. CSVCSV (Comma Separated Values) is a very popular import and export data format used in spreadsheets and databases. Each line in a CSV file is a data record. Each record consists of one or more fields, ...
line='')>>>csvWriter=csv.writer(csvFile,delimiter='\t',lineterminator='\n\n')# ➊>>>csvWriter.writerow(['apples','oranges','grapes'])24>>>csvWriter.writerow(['eggs','bacon','ham'])17>>>csvWriter.writerow(['spam','spam','spam','spam','spam','spam'])32>>>csvFile....
import csv # 写入 CSV 文件 with open('output.csv', 'w', newline='') as csvfile: # 创建 CSV 写入器 writer = csv.writer(csvfile, delimiter=',', quotechar='"') # 写入数据 writer.writerow(['姓名', '年龄', '性别']) writer.writerow(['小明', 18, '男']) writer.writerow(['...
例如,可以将 csv 文件转换为 gzip 格式: import csv, gzipwith gzip.open('sentiment.gz', 'wt', newline='', encoding='utf-8') as gz:writer= csv.writer(gz) for row in csv.reader(open('sentimentdataset.csv', encoding='utf-8'), dialect=dialect): writer.writerow(row) ...
with open('data.csv', 'w', newline='') as file: writer = csv.writer(file) 在这个例子中,我们打开一个名为data.csv的文件,并使用'w'模式来写入数据。newline=''参数用于确保在写入CSV文件时不会出现额外的空行。 接下来,可以使用writerow方法将每一行数据写入CSV文件。假设有一个包含多行数据的列表...