#!/usr/bin/env python
from ert.ecl import EclSum

def writeDiff(filename, vector1, vector2):
    with open(filename, "w") as f:
        for index in range(len(vector1)):
            node1 = vector1[index]
            node2 = vector2[index]

            diff = node1.value - node2.value
            f.write("%f\n" % diff)


if __name__ == '__main__':
    ecl_sum = EclSum("SNAKE_OIL_FIELD")

    report_step = 199
    writeDiff("snake_oil_opr_diff_%d.txt" % report_step, ecl_sum["WOPR:OP1"], ecl_sum["WOPR:OP2"])
    writeDiff("snake_oil_wpr_diff_%d.txt" % report_step, ecl_sum["WWPR:OP1"], ecl_sum["WWPR:OP2"])
    writeDiff("snake_oil_gpr_diff_%d.txt" % report_step, ecl_sum["WGPR:OP1"], ecl_sum["WGPR:OP2"])