Immutability of Tuples and Lists in Python

Python also ships with Cygwin.

Here's a piece using my Cygwin distribution.

This piece demonstrates the immutability of Python lists vs. Python tuples.

Remember that the concept behind "lists" and "tuples" in Python are different from similar mathematical concepts. In mathematics, we often use tuples to refer to various types of orderings. For example, it may be common to say "a measure is a tuple of..."

$ python
Python 2.4.1 (#1, May 27 2005, 18:02:40)
[GCC 3.3.3 (cygwin special)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
>>> mytuple = 1,3,2,0
>>> mylist = [1,3,2,0]
>>> mytuple[0]
1
>>> mytyple[0] = 0
Traceback (most recent call last):
File "", line 1, in ?
NameError: name 'mytyple' is not defined
>>> mylist[0]
1
>>> mylist[0]=0
>>> mylist
[0, 3, 2, 0]
>>>