On Wednesday, October 5, 2016 at 12:51:59 PM UTC-7, Joe Barnhart wrote:
>
> One Python helper I find enormously useful is "extend()" as applied to
> list objects. Extend differs from append in that it adds the items of the
> list provided at the same level as the current list items, thereby
> "extending" the list.
>
I'll try paraphrasing to see if I understand you and the examples: given 2
lists, [a0, a1, .., an] and [b0, b1, ..., bn], you want the elements of b
to be concantenated to the a list, rather than putting a single item
consistenting of the b list at the end of the a list.
Roughly
for item in b:
a.append(item)
Did I get it?
>
> An example:
>
> body = DIV("this","is","the","body")
>
> Result: a DIV with four elements in it.
>
> body.append(["and","additional","elements"])
>
> Result: Not what you wanted! It appends a list to the original DIV
> making a mess.
>
> body.extend(["and","additional","elements"])
>
> This is what you wanted:
>
> DIV("this","is","the","body","and","additional","elements")
>
> I've been monkey-patching "extend" into DIV quite awhile now and thought
> you may want to consider adding it to the DIV helper. Here is my
> monkey-patch:
>
> def extend(self,coll):
> self._setnode(coll)
> ret = self.components.extend(coll)
> self._fixup()
> return ret
> DIV.extend = extend
>
>
/dps
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
You received this message because you are subscribed to the Google Groups
"web2py-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to web2py+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
