Using built-in template functions in a custom template function

[ilovejedd]

Help! It's been years since I've done any programming.

How do I use, for example, list_sort() inside a custom template function?

Thanks!

[BetterRed]

Originally Posted by ilovejedd

Help! It's been years since I've done any programming.

How do I use, for example, list_sort() inside a custom template function?

Thanks!

Moderator Notice
Writing calibre templates is not a Development issue, so I moved your thread to here.

A search of this subforum, in particular this thread, should find some examples of list_sort usage.

BR

[ilovejedd]

Sorry, I didn't explain better. I'm trying to create a custom function that would do a list_sort on lists inside a list.

The code below just gives me:

S/R TEMPLATE ERROR global name 'list_sort' is not defined

def evaluate(self, formatter, kwargs, mi, locals, val, start_index, end_index, sep):
    if not val:
        return ''
    si = int(start_index)
    ei = int(end_index)
    # allow empty list items so counts are what the user expects
    val = [v.strip() for v in val.split(sep)]
    # sort John/Jane to Jane/John
    for i, v in enumerate(val):
        val[i] = list_sort(v,0,'/')
    if sep == ',':
        sep = ', '
    try:
        if ei == 0:
            return sep.join(val[si:])
        else:
            return sep.join(val[si:ei])
    except:
        return ''

[davidfor]

I'm pretty sure that in a template function like that you don't have access to other template functions. I think you will need to use Python functions to do this.

I think the following will work:

val[i] = '/'.join(v.split('/').sort())

But, I haven't tested it.

[ilovejedd]

Thanks.

The code above didn't quite work (something about not being iterable) but managed to get the function working with the ff:

    # sort John/Jane to Jane/John
    separator = '/'
    tmplist = []
    for list1 in val:
        res = [l.strip() for l in list1.split(separator)]
        tmplist.append( separator.join(sorted(res)) )

    val = tmplist