To get the maximum result value of all nodes/elements I iterate over the all fieldOutputs[name].values like example below.

Is there a way to get the maximum of data of all values like: max(vNT11.data)?

myodb = openOdb(path=odbFile, readOnly=True)

for sv in myodb.steps.values():
    stepName = sv.name
    f = myodb.steps[stepName].frames[-1] # last frame only
    vNT11 = f.fieldOutputs['NT11'].values
    maxNT11 = .0
    for v in vNT11:
        if v.data > maxNT11: maxNT11 = v.data
    print maxNT11