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(python2.1-tut.info)Arbitrary Argument Lists

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Arbitrary Argument Lists
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Finally, the least frequently used option is to specify that a function
can be called with an arbitrary number of arguments.  These arguments
will be wrapped up in a tuple.  Before the variable number of
arguments, zero or more normal arguments may occur.

     def fprintf(file, format, *args):
         file.write(format % args)