[Baypiggies] Discussion for newbies/beginner night talks

[Shannon -jj Behrens]

On 2/9/07, Dennis Reinhardt <DennisR at dair.com> wrote:
> At 08:28 PM 2/9/2007, Laszlo Antal wrote:
> >Hi,
> >This is a great thread.
> >I want to thank everyone for sharing their wisdom.
> >Keep it coming.
>
> I *was* going to duck out because I was outnumbered by those favoring
> triple quoting.
>
> Yes, triple quoting can work for simple situations.  The triple quoting
> examples displayed in this thread have been just that: simple.  They do not
> include conditionally executed code or do parameter substitution.  What
> they do is obscure the block structure of the code.
>
> Here is a code fragment from my talk last night (foil 15, I believe).  How
> would you re-write this to utilize triple quoting?  The task here is to
> build a two level visual tree structure:
>
> # build entire initial tree structure
> def init_tree(ht_obj):
>      html = "<table border=0>"
>      index = 0
>      last_exe = ""
>      for xml_entry in util_actwin.display_list("enm", "+"):
>          exe_name = str_extract(xml_entry, ["enm"])
>          keye   = safe_int(str_extract(xml_entry, ["key"]))
>          act = str_extract(xml_entry, ["act"])
>          #logger("init_tree %s %s" % (keye, exe_name))
>          fname, exe = exe_name.split(".")
>          if fname != last_exe:
>              html += "<tr>"
>              if fname == expanded_node:
>                  html += "<td><img src=image/slct32.gif border=0></td>"
>              else:
>                  html += "\r\n<td><a
> href=edt_main.py?slct=expand&fname=%s>" % fname
>                  html += "<%s></a></td>\r\n" % hovered_img(ht_obj, index)
>              html += "<td><img src=%s width=32 height=32></td>" %
> get_program_image(fname)
>              html += "<td>%s</td>" % fname
>              html += "<td>&nbsp;</td>"
>              html += "</tr>"
>          if fname == expanded_node:
>              html += "<tr>"
>              html += "<td>&nbsp;</td>"
>              parm_index = safe_int_default(ht_obj.param("index"), -1)
>              if parm_index == keye:
>                  html += "<td><img src=image/slct32.gif border=0></td>"
>                  html += "<td><img src=%s " % get_action_image(xml_entry)
>                  html +=     "width=32 height=32 border=0></td>"
>              else:
>                  html += "<td><a href=edt_main.py?slct=edit"
>                  html +=     "&class=tree_open32"
>                  html +=     "&index=%s"       % keye
>                  html +=     "&act=%s"         % act
>                  html +=     "><%s></a></td>" % hovered_img(ht_obj, index)
>                  html += "<td><img src=%s " % get_action_image(xml_entry)
>                  html +=     "width=16 height=16 border=0></td>"
>              html += "<td>%s</td>" % get_caption(xml_entry)
>              html += "</tr>"
>          else:
>              pass
>          last_exe = fname
>          index += 1
>      html += "</table>"
>      return html

Seriously, that's what a templating language is used for!  I recommend
Cheetah, Myghty, Mako, or Genshi, depending on your tastes.  Please
excuse me if I say that the above is *ugly*.  It's much better to
break what you can into Python, and use a templating language for the
rest.

Best Regards,
-jj

-- 
http://jjinux.blogspot.com/