John, On Mon, 28 Feb 2005 06:05:44 -0800 (PST), John Christian <[EMAIL PROTECTED]> wrote: > a python 2.3 noob asks: > > # I have some lists > GameLogic.varList0=[1,1,1,1] > GameLogic.varList1=[1,1,1,1] > GameLogic.varList3=[1,1,1,1] > > # I want to change specific list elements > GameLogic.varList0[2]=0 > print GameLogic.varList0 > [1,1,0,1] > > # But I want the assignment > # to be based on variables > LIST=1 > POSITION=2 > > GameLogic.varList$LIST[$POSITION]=0 >
Most likely you want to have a 2-dimensional list. Like so: #note the lists inside a list GameLogic.varMatrix=[[1,1,1,1], [1,1,1,1], [1,1,1,1]] Then, to get to the second element in the first list, do: GameLogic.varMatrix[0][1] Or the third element of the second list: GameLogic.varMatrix[1][2] In general, using zero-based counting of rows and columns, accessing the array is done with: GameLogic.varMatrix[row][column] so access like you have above is just: GameLogic.varMatrix[LIST][POSITION] Assuming that LIST and POSITION are zero-based counts. Also note that all-CAPS variables in python are traditionally used only for constants. This is a pretty strong tradition which, if you break, will confuse anyone trying to read your code. Variables are traditionally either camel case or all lower-case with underscores. > # But the variable assignment above does not work. > # Python complains of a syntax error. > # I've also tried variations of eval(), single ticks, > # back ticks, quotes, etc... but I just can't seem > # to get the syntax right. > # > # Can someone please provide a working example? > the $ is not a syntactic character in python. Single quotes simply delimit strings in python. Back ticks are equivalent to the str() function which creates strings (or is it repr()? I can't remember; it's generally bad form to use back ticks anyway). Double quotes are the same as single quotes. Please read the tutorial at http://docs.python.org/tut/tut.html . Peace Bill Mill bill.mill at gmail.com _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor