Import numpy
originalArray = numpy.range(100)
split1 = originalArray[:len(originalArray)/2] #The use of a :X as an index into an array means that you want all values from the start to the Xth value
split2 = originalArray[len(originalArray)/2:] #The use of a X: as an index into an array means that you want all values from the Xth value to the end