"Daniel Schüle" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > I wonder why there are no methods like arg, abs
> well one can use > c = 1+1j > abs(c) > > In my opinion it would also be nice to have the > possibility to write it as > c.abs() > it looks more OO Python is object based but not rigidly OO in syntax or looks. This is an intentional design decision. Not being gratuitiously redundant is another. > unfortunately there is no arg method to get the angle > of the complex number I agree that this is a deficiency. I would think .angle() should be a no-param method like .conjugate(), though its internal implementation would need access to the appropriate cmath functions. I think returning radians might be enough though. You could submit to the SourceForge tracker a RFE (Request For Enhancement) if not a patch. > I would also like to see some more functions to make > calculations with complex number more convenient > e.g. > c = 27 > c.pow(numerator = 1, denominator = 3, > mode = cmath.EULER, angle_mode = cmath.GRAD) > -> ((3,0), (3,120), (3,240)) Wanting all roots is fairly specialized. sqrt(4) is 2, not (2, -2). > what do you think about it? > maybe there exists some proposals aiming this goal? Have you looked for complex math functions in numpy, numarray, scipy or similar packages? It is possible that a cmath2 module, written in Python, could be useful. Terry J. Reedy
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