Hi, I'm using Python 3.3 and i have a problem for which i've still not found any reasonable explanation...
>>> a_tuple = ("spam", [10, 30], "eggs") >>> a_tuple[1] += [20] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'tuple' object does not support item assignment Ok... I accept this message as += is a reassignment of a_tuple[1] and a tuple is immutable... But, then, why a_tuple is still modified? >>> a_tuple ('spam', [10, 30, 20], 'eggs') I get a TypeError for an illegal operation, but this operation is still completed? -- https://mail.python.org/mailman/listinfo/python-list