python编程：获取页面表格数据并存放到csv中的方法

#!/usr/bin/env python3
# _*_ coding=utf-8 _*_
import csv
from urllib.request import urlopen
from bs4 import BeautifulSoup
from urllib.request import HTTPError
try:
  html = urlopen("http://en.wikipedia.org/wiki/Comparison_of_text_editors")
except HTTPError as e:
  print("not found")
bsObj = BeautifulSoup(html,"html.parser")
table = bsObj.findAll("table",{"class":"wikitable"})[0]
if table is None:
  print("no table");
  exit(1)
rows = table.findAll("tr")
csvFile = open("editors.csv",'wt',newline='',encoding='utf-8')
writer = csv.writer(csvFile)
try:
  for row in rows:
    csvRow = []
    for cell in row.findAll(['td','th']):
      csvRow.append(cell.get_text())
    writer.writerow(csvRow)
finally:
  csvFile.close()

#!/usr/bin/env python3
# _*_ coding=utf-8 _*_
import csv
from urllib.request import urlopen
from bs4 import BeautifulSoup
from urllib.request import HTTPError
try:
  html = urlopen("http://en.wikipedia.org/wiki/Comparison_of_text_editors")
except HTTPError as e:
  print("not found")
bsObj = BeautifulSoup(html,"html.parser")
tables = bsObj.findAll("table",{"class":"wikitable"})
if tables is None:
  print("no table");
  exit(1)
i = 1
for table in tables:
  fileName = "table%s.csv" % i
  rows = table.findAll("tr")
  csvFile = open(fileName,'wt',newline='',encoding='utf-8')
  writer = csv.writer(csvFile)
  try:
    for row in rows:
      csvRow = []
      for cell in row.findAll(['td','th']):
        csvRow.append(cell.get_text())
      writer.writerow(csvRow)
  finally:
    csvFile.close()
  i += 1