Dear Fellow programmers, I'm using Python scripts too organize some rather large datasets describing DNA variation. Information is read, processed and written too a file in a sequential order, like this 1+ 1- 2+ 2-
etc.. The files that i created contain positional information (nucleotide position) and some other info, like this: file 1+: -------------------------------------------- 1 73 0 1 0 0 1 76 1 0 0 0 1 77 0 1 0 0 -------------------------------------------- file 1- -------------------------------------------- 1 74 0 0 6 0 1 78 0 0 4 0 1 89 0 0 0 2 Now the trick is that i want this: File 1+ AND File 1- -------------------------------------------- 1 73 0 1 0 0 1 74 0 0 6 0 1 76 1 0 0 0 1 77 0 1 0 0 1 78 0 0 4 0 1 89 0 0 0 2 ------------------------------------------- So the information should be sorted onto position. Right now I've written some very complicated scripts that read a number of lines from file 1- and 1+ and then combine this output. The problem is of course that the running number of file 1- can be lower then 1+, resulting in a incorrect order. Since both files are too large to input in a dictionary at once (both are 100 MB+) I need some sort of a alternative that can quickly sort everything without crashing my pc.. Your thoughts are appreciated.. Kind regards, Thomas -- http://mail.python.org/mailman/listinfo/python-list
