Ralax wrote: > On Nov 11, 8:58 pm, Chris Rebert <c...@rebertia.com> wrote: >> In [2]: def foo(z, a=[]): >> ...: a.append(z) >> ...: return a >> ...: >> >> In [3]: foo(1) >> Out[3]: [1] >> >> In [4]: foo(2) >> Out[4]: [1, 2] >> >> In [5]: foo(2) >> Out[5]: [1, 2, 2] >> >> In [6]: foo(3) >> Out[6]: [1, 2, 2, 3] >> >> In [7]: foo(4,[]) >> Out[7]: [4] >> >> In [8]: foo(5) >> Out[8]: [1, 2, 2, 3, 5] > > Usefull!
I think Chris post was meant as a warning, but yes, it is useful sometimes. Here's a less error-prone version: >>> def bar(): ... def foo(z, a=[]): ... a.append(z) ... return a ... return foo ... >>> f = bar() >>> f(1) [1] >>> f(2) [1, 2] >>> g = bar() >>> g(3) [3] >>> g(4) [3, 4] Regards, Mick. -- http://mail.python.org/mailman/listinfo/python-list
