Hi all, I did it. Finally managed to port mysqltuner.pl to python. Was a real pain in the butt doing it from bottom up manually, without ever really learing perl syntax. But i finally got it done. Now i need help testing it. find it here. g...@github.com:anandjeyahar/mysqlDbAdmin-python.git.
Also i never really thought about design. Just blindly/mechanically, translated from perl to python. So criticize and let me know how i can improve this. Thanks and Regards, ============================================== Anand Jeyahar https://sites.google.com/site/anandjeyahar ============================================== The man who is really serious, with the urge to find out what truth is, has no style at all. He lives only in what is. ~Bruce Lee Love is a trade with lousy accounting policies. ~Aang Jie On Tue, Aug 16, 2011 at 18:02, aspineux <aspin...@gmail.com> wrote: > On Aug 16, 1:33 pm, "Paul Wray" <paul.w...@det.nsw.edu.au> wrote: >> Hello all >> >> Ive had what I think is a great idea for pure-python templates (I can almost >> hear the groans, bear with me...) >> >> For the impatient, proof of concept is athttp://pastie.org/2379978 >> demonstrating simple substitution, balanced tags using context manager, >> subtemplates, and template inheritance. > > You code fail, see below for other comment > > Traceback (most recent call last): > File "Download/pastie-2379978.rb", line 108, in <module> > make_template(template1) > File "Download/pastie-2379978.rb", line 60, in make_template > ast.fix_missing_locations(astFromSrc) > File "/usr/lib/python2.6/ast.py", line 133, in fix_missing_locations > _fix(node, 1, 0) > File "/usr/lib/python2.6/ast.py", line 132, in _fix > _fix(child, lineno, col_offset) > File "/usr/lib/python2.6/ast.py", line 132, in _fix > _fix(child, lineno, col_offset) > File "/usr/lib/python2.6/ast.py", line 121, in _fix > if 'lineno' in node._attributes: > AttributeError: 'arguments' object has no attribute '_attributes' > > > > >> >> I'm posting here to get opinions on: >> * the merits of the idea, (or otherwise!) >> * whether there are any established/mature templating systems that use this >> approach, or whether its come up before, >> * ideas for improvements and advice on other aspects such as sandboxing >> * of course, to share the idea in case others want to use it > > This is very original ! First time I see it. I like it. > But how to debug large template ? > How to find/detect a missing </TAG> ? > This is very important. This is one big advantage of Genshi over Kid > How to report the correct error at the correct line ? > How to find/get nice editor to edit large template ? > > >> >> Background: Ive been working on an application that recursively renders >> html/xml documents from heterogenoeus trees, with separate classes for each >> document component. First I built my own renderer but was dissatisfied with >> the repetitive code. Then looked at Mako and Jinja, and used Jinja but was >> still disatisfied, because I still needed a render method in each class to >> do preparation, and also the template which was centrally managed by the >> Jinja loader and environment. I found a way to call templates recursively >> via Jinja filters, but was not sure that it wouldnt blow up in my face, so I >> also had separate calls to render the children of each node, and then feed >> the value to the parent template. I kept thinking that there must be a way >> to get the brevity and clarity of declarative templates, plus the simplicity >> of pure python loops, tests and function calls. >> >> The idea: >> Python syntax allows a statement to be a bare literal or identifier. These >> have no effect on the program. >> >> So the function below is legal python: >> >> def myFunc(): >> 'a' >> x = 45 >> 'b'; 'c'; x >> >> So is this (within the appropriate class context of course): >> >> def body(self, r): >> '<h1>'; self.heading; '</h1>' >> '<ul>' >> for itm in self.items: >> '<li>'; itm; '</li>' >> '</ul>' >> >> The idea is simply to use python ASTs to transform this code so that it >> accumulates the values of the bare expressions. > > You could call it PHP :-) > >> >> I think this give the best of both worlds - declarative syntax for the >> template literals, but in a pure python context, giving you all the power of >> python control statements, classes etc. >> >> For application contexts outside pure python code (ie user-created >> templates) , it would be simple to extend the technique to creating template >> functions from strings, and insert the resulting methods into a namespace >> for execution.) >> >> I think, given the technique is already working with the AST, that >> sandboxing should not be too hard either - advice on this aspect would be >> appreciated. > > > Maybe a good idea. > But still a lot of work to get the level of existing libraries. > > Maybe better if mixed with other tools like Genshi to create widget. > Maybe next toscawidget could use such a technique. > > > Thanks for sharing > >> >> Paul Wray > > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
