The python dictionary update method can only pass in one parameter at most, and the collection update method can have multiple parameters

adict={
'a':1,'b':2}
adict.update({
'c':3},{
'd':4})
print(adict)

Output ：

TypeError: update expected at most 1 argument, got 2

Dictionary update Cannot pass in multiple parameters , But the collective update The method is OK ：

aset = {
1, 2, 3}
aset.update({
4, 5}, {
6, 7})
print(aset)

Output ：

{
1, 2, 3, 4, 5, 6, 7}