Python的CSV沒有定義

Question

我使用下面的代碼：

from bs4 import BeautifulSoup 
import csv 
soup = BeautifulSoup (open("43rd-congress.htm")) 

final_link = soup.p.a 
final_link.decompose() 


f = csv.writer(open("43rd_congress_all.csv", "w")) 
f.writerow(["Name","Years","Position","Party", "State", "Congress", "Link"]) 
trs = soup.find_all('tr') 

for tr in trs: 
    for link in tr.find_all('a'): 
     fulllink = link.get ('href') 

     print fulllink #print in terminal to verify results 

     tds = tr.find_all("td") 

     try: #we are using "try" because the table is not well formatted. This allows the program to continue after encountering an error. 
      names = str(tds[0].get_text()) # This structure isolate the item by its column in the table and converts it into a string. 
      years = str(tds[1].get_text()) 
      positions = str(tds[2].get_text()) 
      parties = str(tds[3].get_text()) 
      states = str(tds[4].get_text()) 
      congress = tds[5].get_text() 

     except: 
      print "bad tr string" 
      continue #This tells the computer to move on to the next item after it encounters an error 

     print names, years, positions, parties, states, congress 
     f.writerow([names, years, posiitons, parties, states, congress, fullLink]) 

我碰到下面的錯誤。 在第34行（這是最後一行）。 IndentationError：意外的縮進。我在這裏使用這個教程。 http://jeriwieringa.com/blog/2012/11/04/beautiful-soup-tutorial-part-1/

我懷疑這是縮進問題。使用下面的代碼會在第9行發生錯誤，並且csv未定義。

Answer 1

錯誤非常明顯。

print names, years, positions, parties, states, congress 
     f.writerow([names, years, posiitons, parties, states, congress, fullLink]) 

應該

print names, years, positions, parties, states, congress 
    f.writerow([names, years, posiitons, parties, states, congress, fullLink]) 

Python不喜歡的代碼意外縮進和f.writerow應該有壓痕的相同水平print聲明。

瞭解更多關於indentation here。我建議你不要繼續下去，直到你完全理解它，因爲它是python中最基本和最重要的概念之一。

要解決這個問題，CSV，

您需要

import csv 

在文件的開頭。