使用python从Yahoo Finance上的csv中抓取所选列

Question

我正在尝试从Yahoo Finance数据中抓取选定的列。 我能够以csv格式抓取整个数据，但是我很好奇知道如何只抓取选定的列而不是整个csv数据。 我尝试了split方法，将字符串数据转换为列表，然后仅从列表中访问所需的列，但这种方法行不通。

import urllib2

listOfStocks = ["AAPL", "MSFT", "GOOG", "FB", "AMZN"]

urls = []

for company in listOfStocks:
    urls.append('http://real-chart.finance.yahoo.com/table.csv?s=' + company + '&d=6&e=28&f=2015&g=m&a=11&b=12&c=1980&ignore=.csv')

Output_File = open('../Files_Directory/Yahoo_Finance/Historical_Prices.csv','w')

New_Format_Data = ''

for counter in range(0, len(urls)):

    Original_Data = urllib2.urlopen(urls[counter]).read()

    if counter == 0:
        New_Format_Data = "Company," + urllib2.urlopen(urls[counter]).readline()

    rows = Original_Data.splitlines(1)

    for row in range(1, len(rows)):

        New_Format_Data = New_Format_Data + listOfStocks[counter] + ',' + rows[row]

Output_File.write(New_Format_Data)
Output_File.close()

Answer 1

仅使用现有Yahoo Finance python模块之一，例如“ yahoo_finance ”，可能会使您的生活更轻松

使用此模块仅写出卷数据（未经测试）

import yahoo_finance as yf
import csv

listOfStocks = ["AAPL", "MSFT", "GOOG", "FB", "AMZN"]

with open('my_output') as csvfile:
    Output_file = csv.writer(csvfile)

    for stock in listOfStocks:
        s = yf.Share(stock)
        hist = s.get_historical('2015-01-01', '2015-10-30')

        for row in hist:
            Output_file.writerow([stock, row['Date'], row['Volume'])