why does this code
def f(sum, l=[]):
l.append(sum)
print(l)
f(10)
f(10)
return
[10]
[10, 10]
I cannon understand why shouldn't it return
[10]
[10]
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You're setting l = [] to l = [10], so when you re-run the function it appends 10 to l = [10] thus giving you l = [10,10] – jasonmzx Feb 23 '21 at 14:34
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As List is mutable object above behaviour is observed, similar behaviour is not observed in immutable objects chek https://pythonsimplified.com/mutability-immutability-in-python/ – Anvesh Feb 23 '21 at 14:40