On Tue, Jan 28, 2014 at 12:28 AM, spir <denis.s...@gmail.com> wrote: > <snip> > > a = [1, [1,2]] >>>> b = a >>>> b >>>> >>> [1, [1, 2]] > >> b is a >>>> >>> True > > a's and b's values are a single, unique object... as long as I only > modified them (the values) partly: > > a = [1,[2,3]] >>>> a[0] = 0 >>>> b >>>> >>> [0, [1, 2]] # this is where I get lost. > >> a[1] = [0,0] >>>> b >>>> >>> [0, [0, 0]] > >> a is b >>>> >>> True > > a[0] = b[0] >>>> a[0] is b[0] >>>> >>> True > <snip> > > denis
My python gets a different result: >>> a=[1,[1,2]] >>> b=a >>> b [1, [1, 2]] >>> a=[1,[2,3]] # this breaks the connection. >>> a[0]=0 >>> b [1, [1, 2]] >>> a[1]=[0,0] >>> b [1, [1, 2]] >>> What is going on? I am more confused than I was a week ago. -Denis H
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