hi! Don't worry it's pretty common question for newcomers :) This is called Function Argument Packaging and Function Argument Unpackaging.
arguments could be packaged into list or dictionary: * - position based arguments ** - name based arguments >>> def f(*a, **b): return a, b >>> x, y = f(3, 'hello', c=4, test='world') >>> print x (3, 'hello') >>> print y {'c':4, 'test':'world'} and vice versa, arguments could be extracted for functions >>> def f(a, b): return a + b >>> c = (1, 2) >>> print f(*c) 3 >>> def f(a, b): return a + b >>> c = {'a':1, 'b':2} >>> print f(**c) 3 On Wednesday, March 19, 2014 7:06:31 AM UTC+2, Chops wrote: > > I am just learning Web2py > > I have an understanding of dict but now I find it used with two asterisks > before it and I can't seem to find an explanation!! > > Can it be used with anything other than a form? ((**dict(form.vars))? > > Can I use the two asterisks on other bits of code to server a common > purpose? > > Thanks in advance > -- 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.