Ok now I get it. Thank you. Le mardi 1 septembre 2015 10:29:45 UTC+2, xmarx a écrit : > > This is a shortcut that allows you to pass multiple arguments to a > function directly list. source: > http://stackoverflow.com/questions/36901/what-does-double-star-and-star-do-for-python-parameters > > > TABLE(*[TR(*rows) for rows in table]) > > > TABLE > is a function that can takes list argument. > > [TR(*rows) for rows in table] > is a list. > > > > > > 31 Ağustos 2015 Pazartesi 23:33:23 UTC+3 tarihinde Mamisoa Andriantafika > yazdı: >> >> Thank you for your highlight. You helped me to better understand the >> iteration. >> >> My main misunderstanding was actually the "*" before the "[(TR" ? >> >> Le lundi 31 août 2015 01:07:47 UTC+2, Anthony a écrit : >>> >>> [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 >>>> >>>
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