Convert C++ Lines To Python For Plugin

[redpawfx]

diving head first into Api stuff, how can I convert the following 4 lines from C plugin to python plugin?
tried what I thought would work, but it did not..

const MString magString("magnitude");
MFnArrayAttrsData::Type doubleType(MFnArrayAttrsData::kDoubleArray);
bool arrayExist;
arrayExist = inputPPArray.checkArrayExist(magString, doubleType, &status);

this is from the dynExprField plugin from the devkit

thanks

-johnc

[uiron]

most probably this, not sure about the doubleType.

CODE
magString = "magnitude";
doubleType = 2 # kDoubleArray is no.2 in Type enum
arrayExist = inputPPArray.checkArrayExist(magString, doubleType)

[mydrako]

Kinda curious whether this problem has been solved. I am also trying to use that function checkArrayExist in maya python api but cannot get it to work. Anyone?