Examples

Default Behavior

def f(x=[]):
    x.append(2)
    return x

>>> a = f()
>>> a
[2]
>>> f()
>>> a
[2, 2]

Altered Behavior

from stabledefaults import stabledefaults

@stabledefaults()
def f(x=[]):
    x.append(2)
    return x

>>> a = f()
>>> a
[2]
>>> f()
>>> a
[2]