union()并集intersection()交集difference()差集

union并集，即：合并

intersection()交集

difference()差集

 

qs1=Course.objects.filter(price__get=240)

qs2=Course.objects.filter(price__get=260)

print(p1,union(p2))

print(p1,intersection(p2)
print(p1,difference(p2))