python实现将html表格转换成CSV文件的方法

#!/usr/bin/python
# -*- coding: iso-8859-1 -*-
# Hello, this program is written in Python - http://python.org
programname = 'html2csv - version 2002-09-20 - http://sebsauvage.net'
import sys, getopt, os.path, glob, HTMLParser, re
try: import psyco ; psyco.jit() # If present, use psyco to accelerate the program
except: pass
def usage(progname):
 ''' Display program usage. '''
 progname = os.path.split(progname)[1]
 if os.path.splitext(progname)[1] in ['.py','.pyc']: progname = 'python '+progname
 return '''%s
A coarse HTML tables to CSV (Comma-Separated Values) converter.
Syntax : %s source.html
Arguments : source.html is the HTML file you want to convert to CSV.
 By default, the file will be converted to csv with the same
 name and the csv extension (source.html -> source.csv)
 You can use * and ?.
Examples : %s mypage.html
 : %s *.html
This program is public domain.
Author : Sebastien SAUVAGE 
 http://sebsauvage.net
''' % (programname, progname, progname, progname)
class html2csv(HTMLParser.HTMLParser):
 ''' A basic parser which converts HTML tables into CSV.
 Feed HTML with feed(). Get CSV with getCSV(). (See example below.)
 All tables in HTML will be converted to CSV (in the order they occur
 in the HTML file).
 You can process very large HTML files by feeding this class with chunks
 of html while getting chunks of CSV by calling getCSV().
 Should handle badly formated html (missing , , ,
 extraneous , ...).
 This parser uses HTMLParser from the HTMLParser module,
 not HTMLParser from the htmllib module.
 Example: parser = html2csv()
 parser.feed( open('mypage.html','rb').read() )
 open('mytables.csv','w+b').write( parser.getCSV() )
 This class is public domain.
 Author: Sébastien SAUVAGE 
 http://sebsauvage.net
 Versions:
 2002-09-19 : - First version
 2002-09-20 : - now uses HTMLParser.HTMLParser instead of htmllib.HTMLParser.
 - now parses command-line.
 To do:
 - handle 
 tags
 - convert html entities (&name; and &#ref;) to Ascii.
 '''
 def __init__(self):
 HTMLParser.HTMLParser.__init__(self)
 self.CSV = '' # The CSV data
 self.CSVrow = '' # The current CSV row beeing constructed from HTML
 self.inTD = 0 # Used to track if we are inside or outside a ... tag.
 self.inTR = 0 # Used to track if we are inside or outside a ... tag.
 self.re_multiplespaces = re.compile('s+') # regular expression used to remove spaces in excess
 self.rowCount = 0 # CSV output line counter.
 def handle_starttag(self, tag, attrs):
 if tag == 'tr': self.start_tr()
 elif tag == 'td': self.start_td()
 def handle_endtag(self, tag):
 if tag == 'tr': self.end_tr()
 elif tag == 'td': self.end_td() 
 def start_tr(self):
 if self.inTR: self.end_tr() #  implies 
 self.inTR = 1
 def end_tr(self):
 if self.inTD: self.end_td() #  implies 
 self.inTR = 0 
 if len(self.CSVrow) > 0:
 self.CSV += self.CSVrow[:-1]
 self.CSVrow = ''
 self.CSV += '
'
 self.rowCount += 1
 def start_td(self):
 if not self.inTR: self.start_tr() #  implies 
 self.CSVrow += '"'
 self.inTD = 1
 def end_td(self):
 if self.inTD:
 self.CSVrow += '",' 
 self.inTD = 0
 def handle_data(self, data):
 if self.inTD:
 self.CSVrow += self.re_multiplespaces.sub(' ',data.replace('	',' ').replace('
','').replace('
','').replace('"','""'))
 def getCSV(self,purge=False):
 ''' Get output CSV.
 If purge is true, getCSV() will return all remaining data,
 even if  or  are not properly closed.
 (You would typically call getCSV with purge=True when you do not have
 any more HTML to feed and you suspect dirty HTML (unclosed tags). '''
 if purge and self.inTR: self.end_tr() # This will also end_td and append last CSV row to output CSV.
 dataout = self.CSV[:]
 self.CSV = ''
 return dataout
if __name__ == "__main__":
 try: # Put getopt in place for future usage.
 opts, args = getopt.getopt(sys.argv[1:],None)
 except getopt.GetoptError:
 print usage(sys.argv[0]) # print help information and exit:
 sys.exit(2)
 if len(args) == 0:
 print usage(sys.argv[0]) # print help information and exit:
 sys.exit(2) 
 print programname
 html_files = glob.glob(args[0])
 for htmlfilename in html_files:
 outputfilename = os.path.splitext(htmlfilename)[0]+'.csv'
 parser = html2csv()
 print 'Reading %s, writing %s...' % (htmlfilename, outputfilename)
 try:
 htmlfile = open(htmlfilename, 'rb')
 csvfile = open( outputfilename, 'w+b')
 data = htmlfile.read(8192)
 while data:
 parser.feed( data )
 csvfile.write( parser.getCSV() )
 sys.stdout.write('%d CSV rows written.
' % parser.rowCount)
 data = htmlfile.read(8192)
 csvfile.write( parser.getCSV(True) )
 csvfile.close()
 htmlfile.close()
 except:
 print 'Error converting %s ' % htmlfilename
 try: htmlfile.close()
 except: pass
 try: csvfile.close()
 except: pass
 print 'All done. '