I was woken up today with the following question:
[python]
def foo(x=[]):
x.append(1)
return x
>>> foo()
>>> foo()
[/python]
What could be the output? The answer is
[1]
[1, 1]
I was stupefied for a minute before I started DuckDuckGo-ing Python default arguments, Python garbage collection, Python pitfalls..etc.,
These links helped me understand mutable objects’ memory management.
Deadly Bloody Serious – Default Argument Blunders
Udacity Wiki – Common Python Pitfalls
Digi Wiki – Python Garbage Collection
Arunmozhi 