Check the do_x3dna output file and return list of parameters present in the file.

def checkParametersInputFile(filename):
    """Check the do_x3dna output file and return list of parameters present in the file.
    """
    fin = open(filename, 'r')
    line = fin.readline()
    line2 = fin.readline()
    fin.close()

    temp = re.split('\s+', line)
    temp2 = re.split('\s+', line2)

    if temp[0] == '#Minor':
        return groovesParameters

    if temp[0] == '#Shift':
        return baseStepParameters

    if temp[0] == '#X-disp':
        return helicalBaseStepParameters

    if temp[0] == '#Shear':
        return basePairParameters

    if temp[0] == '#Position':
        return helicalAxisParameters

    if temp2[0] == '#P':
        return helicalRadiusParameters

    if temp2[0] == '#alpha':
        return backboneDihedrals