Can python assign values ​​continuously?

If continuous assignment in python depends on the order, you should pay attention to the order of continuous assignment in python

For example, expression: a=b=1

Proceed a=1 first

Then b=1

Code:

class Node():
def __init__(self,elem,nextnode=None):
self._elem=elem
self._nextnode=nextnode
a=Node('a')
a=a._nextnode=Node('b')

According to understanding: python should first perform a._nextnode=Node(' b'), and then a=Node('b')

But in fact, python first performs a=Node('b'), and then a._nextnode=Node('b')

>>> a is a._nextnode
True

So the correct order is a._nextnode=a=Node('b')

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