Hello I saw in a code from a previous message in this forum a curious function argument.
def test(x=[0]): print(x[0]) ## Poor man's object x[0] += 1
test()
0
test()
1
test()
2
I understand that the author wants to implement a global variable x . It would be better to write 'global x' inside the function. At first test() function call, it prints 0, that's OK. But at the second call, since we dont pass any argument to test(), x should be equal to its default value [0] (a single item list). But it seems that Python keeps the original object whose content has been changed to 1. Is it a usual way to implement a global variable ? thx -- https://mail.python.org/mailman/listinfo/python-list
