來自錯誤變量的數據 - CSV

我正在寫一個beatifulsoup webcrawler。該腳本獲取正確的數據並以csv格式將其寫入文件。但是，當試圖讀取數據時（靠近代碼結尾），我使用不同的變量名稱再次打開文件並嘗試讀取。但是，最後一行打印的輸出是來自原始網站的一堆HTML代碼。我認爲它來自'湯'字符串。到底是怎麼回事？來自錯誤變量的數據 - CSV

import datetime 
import csv 
import urllib 
from bs4 import BeautifulSoup 
import urllib2 


file_name = "https://stackoverflow.com/users/ripple/Dropbox/Python/FinViz.txt" 
file = open(file_name,"w") 

url = "http://www.finviz.com" 
print 'Grabbing from: ' + url + '...\n' 
try: 
     r = urllib2.urlopen(url) 
except urllib2.URLError as e: 
      r = e 
if r.code in (200, 401):  
    #get the table data from the page 
    data = urllib.urlopen(url).read() 
    #send to beautiful soup 
    soup = BeautifulSoup(data) 
    i=1 
    for table in soup("table", { "class" : "t-home-table"}): 
     #First and second tables 
     if i==1 or i==2: 
      for tr in table.findAll('tr')[1:]: 
       if i<3: 
        col = tr.findAll('td') 
        ticker = col[0].get_text().encode('ascii','ignore') 
        price = col[1].get_text().encode('ascii','ignore') 
        change = col[2].get_text().encode('ascii','ignore') 
        volume = col[3].get_text().encode('ascii','ignore') 
        metric = col[5].get_text().encode('ascii','ignore') 
        record = ticker + ',' + price + ',' + change + ',' + volume + ',' + metric + '\n' 
        print record 
        file.write(record) 
     if i==3: 
      file.write('END\n') 
     # Third and fourth tables 
     if i==3 or i==4: 
      for tr in table.findAll('tr')[1:]: 
        col = tr.findAll('td') 
        ticker1 = col[0].get_text().encode('ascii','ignore') 
        ticker2 = col[1].get_text().encode('ascii','ignore') 
        ticker3 = col[2].get_text().encode('ascii','ignore') 
        ticker4 = col[3].get_text().encode('ascii','ignore') 
        metric = col[5].get_text().encode('ascii','ignore') 
        record = ticker1 + ',' + ticker2 + ',' + ticker3 + ',' + ticker4 + ',' + metric + '\n' 
        print record 
        file.write(record) 
     i+=1 
#if the page does not open 
else: 
    print "ERROR:" 
file.close() 
#open written file to read tickers and download tables from finviz 
file = open(file_name,"r") 
finviz_csv = csv.reader(file) 
for row in finviz_csv: 
    stock = col[0] 
    print stock

來源

2013-04-13 Super-cluser

我已經很快解決了這個問題。它應該看起來像這樣：

for row in finviz_csv: 
    colnum = 1 
    for col in row: 
     if colnum==1: 
      stock = col 
      print col

來源

2013-04-13 18:00:45

來自錯誤變量的數據 - CSV

回答

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