1.CSV文件 import csv with open(r"E:\code\0_DataSet\tianchi_2015_mobile_recommand\fresh_comp_offline\tianchi_fresh_comp_train_user.csv","r+") as rdFile ,\ open("data.csv","w+",newline="") as wrFile: # writeFi…

当python读取文件出现_csv.Error: line contains NULL byte时, # -*- coding:utf-8 -*- import csv with open(r'E:\abc\web_test\userinfo.csv','rb') as f: reader = csv.reader(f) rows = [row for row in reader] print rows 报错: D:\Python27\python.exe E:/abc/loop_reader.…

csv文件 code from xml.etree.ElementTree import Element,ElementTree,tostring import json,csv def csvtoxml(fname): with open(fname,'r') as f: reader=csv.reader(f) header=next(reader) root=Element('Daaa') print('root',len(root)) for row in reader: erow=El…

一.open文件打开和with open as 文件打开的区别 file= open("test.txt","r") try: for line in file.readlines(): print(line) except: print("error") finally: file.close() with open("test.txt","r") as file: for line in file.re…

可以不使用CSV模块 逐行处理: for line in open("samples/sample.csv"): title, year, director = line.split(",") print year, title 使用CSV: import csv reader = csv.reader(open("samples/sample.csv")) for title, year, director in reader: print y…

import csv headers = ["class", "name", "sex", "height", "year"] # rows = [ # [1, 'xiaoming', 'male', 168, 23], # [1, 'xiaohong', 'female', 162, 22], # [2, 'xiaozhang', 'female', 163, 21], # [2, 'xiaoli', '…

csv文件通常存在如下问题: 1. 文件过大(需要进行文件分割)2. 列异常(列不一致,如元数据列为10列,但csv文件有些行是11列,或者4列)本脚本用于解决此问题. #coding=utf-8 ''' 脚本说明 用来解决csv文件的列异常问题(以逗号分隔符为例): csv文件有些列含有换行符.逗号等特殊符号,这就导致csv文件出现列异常的情况. 此脚本将csv文件输出成如下文件:源文件名-正确列-文件序号.csv 源文件名-错误列.csv 源文件名-info.txt 常用文本编码: gbk,…

读取csv文件: def readCsv(): rows=[] with file(r'E:\py\py01\Data\system.csv','rb') as f: reads=csv.reader(f) for i in reads: rows.append(i) print rows return rows写入csv文件: def writer(): with file(r'E:\py\py01\Data\system.csv','wb') as f: writer=csv.writer(…

http://blog.csdn.net/azhao_dn/article/details/16989777 可能大家都遇到过,python在输出的csv文件中如果有utf-8格式的中文,那么在使用excel打开该csv文件时,excel将不能够有效识别 出文件中的中文数据,严重时甚至不能够识别出分隔符.那么,要怎样操作才能够让excel识别出utf-8格式的中文呢?方法其实很简单,见以下代码: import codecs with open('ExcelUtf8.csv', 'w') as f…

并行进程怎么使用? import os import sys import time def processFunc(i): time.sleep(10-i) print i if __name__=='__main__': from multiprocessing import Pool pool=Pool() for i in range(0,10): print i print '----------------split line-----------------' for i in r…