title: CssParser Error, while converting html to pdf ,PISA & Python
body: <p>Im trying to convert html documents into pdf file using pisa and python. It works fine for small html code. But when you pass google.com's html data through it , or in fact any big html file , it troughs this error.</p>
  
  <p>here is the code that converts the html to pdf:</p>
  
  <pre><code>import ho.pisa as pisa
  import sys
  import os
  ls =[]
  for arg in sys.argv:
      ls.append(arg)
  pisa.showLogging()
  print ls
  
  html_file = open(ls[1])
  HTML = html_file.read()
  filename = os.path.basename(str(ls[1]))
  print filename
  str(os.getcwd()+filename)
  pdfFile =open(str(os.getcwd()+filename), "wb")
  pdf = pisa.CreatePDF(HTML,pdfFile)
  
  if not pdf.err:
      print "ds"
      pisa.startViewer(filename)
  
  pdfFile.close()
  html_file.close()
  </code></pre>
  
  <p>and this the error that is thrown :</p>
  
  <pre><code>ERROR [ho.pisa] C:\Python27\lib\site-packages\sx\pisa3\pisa_document.py line 223: Document error
  
  Traceback (most recent call last):
    File "C:\Python27\lib\site-packages\sx\pisa3\pisa_document.py", line 128, in pisaDocument
      c = pisaStory(src, path, link_callback, debug, default_css, xhtml, encoding,
   c=c, xml_output=xml_output)
    File "C:\Python27\lib\site-packages\sx\pisa3\pisa_document.py", line 73, in pisaStory
      pisaParser(src, c, default_css, xhtml, encoding, xml_output)
    File "C:\Python27\lib\site-packages\sx\pisa3\pisa_parser.py", line 626, in pisaParser
      c.parseCSS()
    File "C:\Python27\lib\site-packages\sx\pisa3\pisa_context.py", line 545, in parseCSS
      self.css = self.cssParser.parse(self.cssText)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 358, in parse
      src, stylesheet = self._parseStylesheet(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 453, in _parseStylesheet
      src, atResults = self._parseAtKeyword(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 577, in _parseAtKeyword
      src, result = self._parseAtIdent(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 722, in _parseAtIdent
      src, stylesheet = self._parseStylesheet(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 458, in _parseStylesheet
      src, ruleset = self._parseRuleset(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 737, in _parseRuleset
      src, properties = self._parseDeclarationGroup(src.lstrip())
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 922, in _parseDeclarationGroup
      raise self.ParseError('Declaration group closing \'}\' not found', src, ctxsrc)
  CSSParseError: Declaration group closing '}' not found:: (u'{', u'0%{opacity:0}50%{opa')
  Traceback (most recent call last):
    File "trypdf.py", line 16, in &lt;module&gt;
      pdf = pisa.CreatePDF(HTML,pdfFile)
    File "C:\Python27\lib\site-packages\sx\pisa3\pisa_document.py", line 128, in pisaDocument
      c = pisaStory(src, path, link_callback, debug, default_css, xhtml, encoding,
   c=c, xml_output=xml_output)
    File "C:\Python27\lib\site-packages\sx\pisa3\pisa_document.py", line 73, in pisaStory
  pisaParser(src, c, default_css, xhtml, encoding, xml_output)
    File "C:\Python27\lib\site-packages\sx\pisa3\pisa_parser.py", line 626, in pisaParser
      c.parseCSS()
    File "C:\Python27\lib\site-packages\sx\pisa3\pisa_context.py", line 545, in parseCSS
  self.css = self.cssParser.parse(self.cssText)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 358, in parse
  src, stylesheet = self._parseStylesheet(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 453, in _parseStylesheet
      src, atResults = self._parseAtKeyword(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 577, in _parseAtKeyword
      src, result = self._parseAtIdent(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 722, in _parseAtIdent
      src, stylesheet = self._parseStylesheet(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 458, in _parseStylesheet
      src, ruleset = self._parseRuleset(src)
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 737, in _parseRuleset
      src, properties = self._parseDeclarationGroup(src.lstrip())
    File "C:\Python27\lib\site-packages\sx\w3c\cssParser.py", line 922, in _parseDeclarationGroup
      raise self.ParseError('Declaration group closing \'}\' not found', src, ctxsrc)
  sx.w3c.cssParser.CSSParseError: Declaration group closing '}' not found:: (u'{', u'0%{opacity:0}50%{opa')
  </code></pre>