方法
1.
item = TCMdatabase.objects.filter(datalabel=labelfilerelative).values()[0]
datasetid = item.get('datasetid')
print(item.get('datasetid'))
{'datasetid': 13, 'datalabel': '/static/label/1612414379.4205747daab1005-66a4-11eb-9958-e86a6468dcd8.txt', 'datatrain': '/static/label/1612414379.4205747daab1005-66a4-11eb-9958-e86a6468dcd8.txt'}
13