On Thu, Feb 23, 2012 at 9:55 PM, xixiliguo <wangbo....@gmail.com> wrote: > c = [1, 2, 3, 4, 5] > class TEST(): > c = [5, 2, 3, 4, 5]
That line creates a class (i.e. "static") variable, which is unlikely to be what you want. Instance variables are normally created in the body of an __init__() method. > def add( self ): > c[0] = 15 > > a = TEST() > > > a.add() > > print( c, a.c, TEST.c ) > > result : > [15, 2, 3, 4, 5] [5, 2, 3, 4, 5] [5, 2, 3, 4, 5] > > > why a.add() do not update c in Class TEST? but update c in main file Python is not Java (or similar). To refer to instance variables, you must explicitly use `self`; i.e. use "self.c[0] = 15" in add(). I would recommend reviewing the relevant section of the Python tutorial: http://docs.python.org/tutorial/classes.html Cheers, Chris -- http://mail.python.org/mailman/listinfo/python-list
