[TR(*rows) for rows in table] is a list comprehension -- it iterates over the items in "table" (which are themselves lists) and creates a new list of TR objects.
The "*" before the list is Python syntax for argument unpacking, treating each item in the list as if it were a separate positional argument. Note, technically argument unpacking is not necessary for TABLE nor for TR, as both will alternatively accept a list as the first argument. So, the code could be changed to: TABLE([TR(row) for row in table]) Anthony On Sunday, August 30, 2015 at 1:20:38 PM UTC-4, Mamisoa Andriantafika wrote: > > Hi, > > Could you explain to me how this code works? > > http://web2py.com/books/default/chapter/29/05/the-views#TABLE--TR--TD > > >>> table = [['a', 'b'], ['c', 'd']] > >>> print TABLE(*[TR(*rows) for rows in table]) > <table><tr><td>a</td><td>b</td></tr><tr><td>c</td><td>d</td></tr></table> > > > I do not completely understand how the loop is created there? > > Thank you for your highlight. > > Mike > -- 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.
