I am comfused about the name behavior of Python in recursion

[380162267qq at gmail.com]

Google told me Python name is a label attaching to the object.
But in this recursive function,the name 'a' will point to different number object.

def rec(a):
	a+=1
	if a<10:
		rec(a)
	print(a)

rec(0) gives me 10....1 normally.Why it works? Because of the stack memory management?

Thank you