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Tue Apr 17 14:43:37 EDT 2001 · http://mail.python.org/pipermail/python-list/2001-April/098188.html

iddwb <iddwb at imap1.asu.edu> wrote in comp.lang.python:
> 
> I've been going through the diveintopython stuff.  Mostly excellent
> material.  however, there is syntax I don't understand was hoping someone
> could enlighten me..
> 
> Here's the code i've been working with.  I borrowed the code to create my
> own HTMLProc class.  The difficulties begin with the uknown_starttag
> function.  I keep getting a syntax error on the strattrs assignment.  I
> thought I copied the code verbatim but it still generates a syntax
> error.  Now, if I understood the syntax, I could fix it (probably).  But I
> am wondering if someone might explain the problem and the fix.

If it's not the indentation problem, maybe you're using an old Python
version? That assignment uses string methods and a list comprehension, and
you need Python 2.0 at least for that. But 2.1 came out today, time for an
upgrade anyway :).

-- 
Remco Gerlich

> 
> #!/usr/local/bin/python
> # first test to open web pages using urlopen2
> from sgmllib import SGMLParser
> import sys
> 
> class HTMLProc(SGMLParser):
>         def reset(self):
> 	# from diveintopython.org, extends SGMLParser
> 	     SGMLParser.reset(self)
> 	     self.parts = []
> 
> 	def unknown_starttag(self, tag, attrs):
> 		strattrs = "".join([' %(key)s="%(value)s"' % locals() for key, value in attrs])
> 		self.parts.append("<%(tag)s%(strattrs)s>" % locals())
> 		
> 	def unknown_endtag(self, tag):
> 		self.parts.append("</%(tag)s>" % locals())
> 
> 	def output(self):
> 		return "".join(self.parts)
> 	     
> def do_body(fd):
> 	try:
> 		gmlbuffer = HTMLProc()
> 		gmlbuffer.feed(fd.read())
> 		fd.close()
> 		gmlbuffer.close()
> 	except AttributeError:
>                 gmlbuffer.unknown_starttag("body", "bgcolor")
> 		print "Attribute Error"
>                 return -1
> 	print "done with body"
> 	return gmlbuffer
> 
> if __name__ == '__main__':
> #	print sys.argv[1:]
> 	try:
> 		f = open("dean.html")
> 	except IOError:
> 		print "couldn't open ", sys.argv[1:]
> 		sys.exit(1)
> 	htmlbuff = do_body(f)
> 	print htmlbuff.parts
> 
> David Bear
> College of Public Programs/ASU
> 

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syntax from diveintopython