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python 循环写入Csv

我改了一下你的代码,实测是可以从 a.csv复制到 b.csv中 import csv def foo(): with open('a.csv', 'r') as f: reader = csv.DictReader(f) rows = [row for row in reader] if not rows: return with open('b.csv', mode='w', newline='', err...

最常用的一种方法,利用pandas包 import pandas as pd#任意的多组列表a = [1,2,3]b = [4,5,6] #字典中的key值即为csv中列名dataframe = pd.DataFrame({'a_name':a,'b_name':b})#将DataFrame存储为csv,index表示是否显示行名,default=Truedatafr...

csv文件内每一行即一行数据,每一个逗号为一列数据。因此,先按行读取一行,再按逗号分割即可。 csvfile = open('your_csv_file.csv', 'r')data = []for line in csvfile: data.append(list(line.strip().split(','))) 此外,numpy.loadtxt也提...

import csvcsvfile = file('csvtest.csv', 'wb')writer = csv.writer(csvfile)writer.writerow(['id', 'url', 'keywords'])data = [ ('1', 'http://www.xiaoheiseo.com/', '小黑'), ('2', 'http://www.baidu.com/', '百度'), ('3', 'http://www....

代码如下: import requests from bs4 import BeautifulSoup import csv def GetInfo(url): res=requests.get(url).text soup=BeautifulSoup(res,'html.parser') names=soup.select('div.list > ul > li > div > p.infoBox > a') years=soup.sel...

# -*- 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...

for line in open(r'C:/Users/Test.csv') : 试下

实测是可以从 a.csv复制到 b.csv中 import csv def foo(): with open('a.csv', 'r') as f: reader = csv.DictReader(f) rows = [row for row in reader] if not rows: return with open('b.csv', mode='w', newline='', errors='ignore') as f2:...

l = [{"nickname":"abc","content":"I am a studet."},{"nickname":"123","content":"I want to eat."}] with open('d://111.txt','w') as file: for d in l: file.write('%s,%s\n'%(d['nickname'],d['content'])) 效果: abc,I am a studet. 12...

具体如下: # _*_ coding:utf-8 _*_ #xiaohei.python.seo.call.me:) #win+python2.7.x import csv csvfile = file('csvtest.csv', 'wb') writer = csv.writer(csvfile) writer.writerow(['id', 'url', 'keywords']) data = [

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