Hi the second argument in the functions below suppose to retain its value between function calls, the first does, the second does not and I would like to know why it doesn't? and how to make it so it does?
thanks
# it does
def f(a, L=[]):
L.append(a)
return L
print f('a')
print f('b')
# it does not
def f(a, b=1):
b = a + b
return b
print f(1)
print f(2)
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