Brombo,
The parameter 'real' in Function is an optional parameter. So if
you don't include that parameter, it is assumed that the function is a real
variable function. If you want to specify otherwise then you can pass in
the value 'real=False'. But it is a good practice specifying explicitly
that the function is a real valued function. For more info you can visit
the docs. link :
https://docs.python.org/3/tutorial/controlflow.html#default-argument-values
Pranit Bauva
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