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need dict to maintain order

rihad rihad at mail.ru
Sat Jan 19 09:03:57 EST 2002 
On Fri, 18 Jan 2002 11:39:36 -0500, "Steve Holden"
<sholden at holdenweb.com> wrote:

>Rather than using a dictionary and then (presumably) a while loop until the
>dictionary is empty, consider setting up a list or tuple of tuples, such as
>
>    links = (('index.html', 'Home'), ('file0.html', 'Some foo'))
>
>The you can use
>
>    for link, caption in links:
>        # generate nav bar line from link and capion
>
Here's what I was able to come up with (constantly referring to the
man/tut :)). Maybe someone finds it... hmmm... useful and/or enjoys
commenting newbies' code :)
(sorry, didn't `tabs2spaces' the code since tabs are natural (?) in
python anyway)

import os

class navbar:
	def __init__(self):
		self.links = ( \
			('index.html', 'Home'), \
			('prog.html', 'Programming'), \
			('doc.html', 'Docs'), \
		)
		self.dirname = self.__class__.__name__ 
		self.cur_link = 0
		try:
			os.mkdir(self.dirname)
		except OSError:
			pass
	def __call__(self):
		while self.cur_link < len(self.links):
			self.start()
			for link, target in self.links:
				self.start_link()
				if self.cur_link != self.num_done:
					self.f.write("""<a href="%s">%s</a>""" % (link,
target))
				else:
					self.f.write("""<span
class="disabled-link">%s</span>""" % target)
				self.end_link()
			self.end()
	def start(self):
		fullname = self.dirname + '\\' + self.links[self.cur_link][0]
+ '.nav'
		self.f = file(fullname, "w")
		self.num_done = 0
	def start_link(self):
		pass
	def end_link(self):
		self.num_done += 1
	def end(self):
		self.f.close()
		self.cur_link += 1

class navbar_horz(navbar):
	def __init__(self):
		navbar.__init__(self)
	def start(self):
		navbar.start(self)
		self.f.write("""<div class="navbar-horz">\n[\n""")
	def start_link(self):
		navbar.start_link(self)
	def end_link(self):
		navbar.end_link(self)
		if self.num_done < len(self.links):
			self.f.write("\n | ")
	def end(self):
		self.f.write("\n]\n</div>\n")
		navbar.end(self)

class navbar_vert(navbar):
	def __init__(self):
		navbar.__init__(self)
	def start(self):
		navbar.start(self)
		self.f.write("""<div class="navbar-vert">\n""")
	def start_link(self):
		navbar.start_link(self)
	def end_link(self):
		navbar.end_link(self)
		if self.num_done < len(self.links):
			self.f.write("<br><br>\n")
	def end(self):
		self.f.write("\n</div>\n")
		navbar.end(self)

if __name__ == '__main__':
	navbar_horz()()
	navbar_vert()()
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