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. -- https://mail.python.org/mailman/listinfo/python-list
