what does this mean?

[Mike C. Fletcher]

mr. ice wrote:

>I am new to python, The following statement is in the beginning of
>class definition in a python scripts, what does it mean?  Help?
>class %(class_)s_W : public XMsg_W
>{
>  
>

You will likely notice that there are "" or '' marks around the text 
you're reading there.  It looks a lot like a string template that 
someone is using to create C++ code.  A string like this "Hello 
%(name)s_xyz" gets expanded in Python like so:

    name = 'this'
    value = "Hello %(name)s_xyz" % locals()

yielding:

    value == "Hello this_xyz"

So whoever coded the module is likely trying to auto-generate some C++ 
code using Python string substitution.

HTH,
Mike

 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/
  blog: http://zope.vex.net/~mcfletch/plumbing/