On Thursday, December 3, 2015 at 7:59:16 PM UTC-5, MRAB wrote: > On 2015-12-04 00:30, Robert wrote: > > Hi, > > > > I remember that there is a way to set several list elements a same value > > with > > one line code. Excuse me, I don't remember the accurate syntax on the code > > snippet. But the basic format looks like this. > > > > 1. There is a four-element list, such as: > > bb=[[[]],[[]],[[]],[[]]] > > 2. An assignment line is here: > > bb[0]='a' > > 3. Then, all 4 element of bb is set with the above value. > > bb=[['a'],['a'],['a'],['a']] > > > > The above three line codes are what I guess (I forgot the original tutorial > > now). Do you remember there is such a list application? > > > Do you mean this behaviour: > > >>> bb=[[[]]] * 4 > >>> print(bb) > [[[]], [[]], [[]], [[]]] > >>> bb[0][0]='a' > >>> print(bb) > [['a'], ['a'], ['a'], ['a']] > > ? > > That's because the bb contains 4 references to the same list.
Yes! What you post is I want. Thanks. -- https://mail.python.org/mailman/listinfo/python-list
