default values in python

gistfile1.py

#default values in ruby https://gist.github.com/kianxineki/8b13ebc8816623f4a650
def append_values(new_value, a=[]):
    a.append(new_value)
    return a

append_values("n1") # result ['n1']
rlist = append_values("n2") # result ['n1', 'n2']
rlist.append("n3")
print(rlist) # result ['n1', 'n2', 'n3']
append_values("n4") # result ['n1', 'n2', 'n3', 'n4']
append_values("n0", []) # result ['n0']
append_values("n5") # result ['n1', 'n2', 'n3', 'n5']

append_values.func_defaults # (['n1', 'n2', 'n3', 'n5'],)