On Sunday, January 8, 2017 at 3:04:07 PM UTC-5, Terrence Brannon wrote: > > I attempted to simplify creation of the response.menu list of tuples by > the following function: > > > def menu_item(menu_item_text, url, sub_menu=None, ignore=False): > # First element of tuple is the text of the meny item. > retval = list(menu_item_text) >
The above is not the way to create a list with menu_item_text as a single item. The list() function iterates over the argument passed in and makes each element a list item. Because strings are iterable, it creates a list with each element being a single character in menu_item_text. Therefore, the fourth item in retval is always the fourth character in menu_item_text rather than the sub_menu. When the MENU helper gets to what it expects to be a submenu, it instead gets a single character, which of course cannot be unpacked via item[:3]. It's always a good idea to test the outputs of your functions as you develop them -- much easier to find bugs when you can isolate the effect to a small function. Anthony -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
