What is the most pythonic way to build up large strings?

[Asaf Las]

On Saturday, February 8, 2014 9:41:53 AM UTC+2, cstru... at gmail.com wrote:
> I am writing a couple of class methods to build up several 
> lines of html.  Some of the lines are conditional and most need 
> variables inserted in them.  Searching the web has given me a 
> few ideas.  Each has its pro's and cons.
> 
> The best I have come up with is:
> 
> def output_header_js(self, jquery=True, theme=None):
>     if self.static_path is None :
>         return None
> 
>     if jquery is True:
>         output = '"<script type="text/javascript" '
>         output += 'src="/%s/jquery/jqueryui.js"></script>'% static
>         output += '"<script type="text/javascript" '
>         output += 'src="/%s/jquery/jquery.js"></script>'% static
> 
>     if theme is not None:
>         output += '<link href="/%s/jtable/themes/%s/jtable.css" '% static, theme
> 
>         output += 'rel="stylesheet" type="text/css" />'
> 
>     output += '"<script type="text/javascript" '
>     output += 'src="/%s/jtable/jquery.jtable.js"></script>' % "static"
> 
> I realize that a lot of the above looks repetitive but it is 
> designed to eliminate boilerplate HTML.
> 

note, due to strings are immutable - for every line in sum operation 
above you produce new object and throw out older one. you can write 
one string spanned at multiple lines in very clear form. 


/Asaf