On 06/18/2013 03:51 AM, Νίκος wrote: > Στις 18/6/2013 12:05 μμ, ο/η Steven D'Aprano έγραψε: >> Names are *always* linked to objects, not to other names. >> >> a = [] >> b = a # Now a and b refer to the same list >> a = {} # Now a refers to a dict, and b refers to the same list as before > > I see, thank you Steven. > > But since this is a fact how do you create complicated data structures > that rely on various variables pointing one to another liek we did in > C++(cannot recall their names) ? >
As Steve said Python provides all manner of data structures and the means to create data structures. Any data structure (trees, lists, etc) can all be made easily in Python using Python's basic data structures, if the built-in data structures are not sufficient. It turns out that lists, hashes (dicts), and classes can pretty much do anything with having to much about with C-style pointers and such. Do yourself a favor and forget about the low-level stuff in Python for now. You'll be more frustrated if you don't. The real power and expressivity of Python comes from embracing the abstractions that Python provides to your advantage. There's a certain elegance and beauty that comes from such things, which I believe really comes from the elegance and beauty of LISP, some of which manages to shine forth in Python, despite its deficiencies. When I first learned Python, I was impressed that some of the elegance that I remember from Scheme (how to use lists as a basic type for example) was there, but in a form that appealed to me. -- http://mail.python.org/mailman/listinfo/python-list