Expanding tuples into arguments

Question

Is there a way to expand a Python tuple into a function - as actual parameters   For example  here expand   does the magic   some tuple    1   foo    bar    def myfun number  str1  str2       return  number   2  str1   str2  str2   str1   myfun expand some tuple      2   foobar    barfoo     I know one could define myfun as myfun  a  b  c    but of course there may be legacy code  Thanks

User · Accepted Answer

myfun  some tuple  does exactly what you request  The   operator simply unpacks the tuple  or any iterable  and passes them as the positional arguments to the function  Read more about unpacking arguments

User · Answer

Note that you can also expand part of argument list   myfun 1     foo    bar

User · Answer

Take a look at the Python tutorial section 4 7 3 and 4 7 4  It talks about passing tuples as arguments   I would also consider using named parameters  and passing a dictionary  instead of using a tuple and passing a sequence  I find the use of positional arguments to be a bad practice when the positions are not intuitive or there are multiple parameters

User · Answer

This is the functional programming method  It lifts the tuple expansion feature out of syntax sugar  apply tuple   lambda f  t  f  t   Redefine apply tuple via curry to save a lot of partial calls in the long run  from toolz import curry apply tuple   curry apply tuple   Example usage  from operator import add  eq from toolz import thread last  thread last        1 2    3 4         map  apply tuple add        list       eq   3  7       Prints  True

User · Answer

Similar to  Dominykas s answer  this is a decorator that converts multiargument-accepting functions into tuple-accepting functions  apply tuple   lambda f  lambda args  f  args   Example 1  def add a  b       return a   b  three   apply tuple add   1  2    Example 2   apply tuple def add a  b       return a   b  three   add  1  2

[python] Expanding tuples into arguments

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