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python Csv with opEn

reader = csv.reader(open('E:/BigData/tianchi_mobile_recommend_train_user.csv','r+')) \t是制表符,直接用/代表\避免 出现 "\t" "\n"这样的转 义符

Python文档中有提到: open('eggs.csv', newline='') 也就是说,打开文件的时候多指定一个参数。Python文档中也有这样的示例: import csvwith open('eggs.csv', 'w', newline='') as csvfile: spamwriter = csv.writer(csvfile, delimiter=' ',...

import csvwith open('test.csv') as csvfile: rows = csv.reader(csvfile) with open('test1.csv','w', newline='') as f: writer = csv.writer(f) for row in rows: row.append(row[len(row)-1]) writer.writerow(row)这是一个把最后一列重复...

把"list.csv"改成filename def csv2dict(fname): new_dict = {} with open(fname, 'rb') as f: reader = csv.reader(f, delimiter=',') fieldnames = next(reader) reader = csv.DictReader(f, fieldnames=fieldnames, delimiter=',') for row i...

with open(r"C:\Users\*******\Desktop\pokemon.csv") as f:少了个r

# -*- coding: utf8 -*-import csvl = [['1', 'Wonderful Spam'],['2', 'Lovely Spam']]#模拟数据写入一个csvwith open('eggs.csv', 'w', newline='') as csvfile: spamwriter = csv.writer(csvfile, delimiter=',', quotechar='"', quoting=csv...

这个跟你打开文件的方式有关,官方教程例子: import csvwith open('eggs.csv', 'wb') as csvfile: spamwriter = csv.writer(csvfile, delimiter=' ', quotechar='|', quoting=csv.QUOTE_MINIMAL) spamwriter.writerow(['Spam'] * 5 + ['Baked B...

csv文件本质上是一个文本文件,具体的读取和写入方法有两种: 直接对csv文件进行文件读写操作,每一行是一条记录,按行读取即可,简单代码如下: with open("XXX.csv","wr") as f: f.readline() f.write() 2.使用第三方库中的csv文件读写函数(...

import csvwith open('eggs.csv', newline='') as csvfile: spamreader = csv.reader(csvfile, delimiter=',', quotechar=',') for row in spamreader: print(', '.join(row))

my_file = r'C:\test\test.csv'with open(my_file) as f: reader = csv.reader(f) row1 = next(reader)print(row1)print(row1[0])

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