Python 3.2.3rc2 (default, Mar 21 2012, 06:59:51) 
[GCC 4.6.3] on linux2
Type "copyright", "credits" or "license()" for more information.
>>> x = [1, 7, 9]
>>> x
[1, 7, 9]
>>> print(x)
[1, 7, 9]
>>> y = x
>>> y
[1, 7, 9]
>>> x
[1, 7, 9]
>>> y[1] = 11
>>> y
[1, 11, 9]
>>> x
[1, 11, 9]
>>> z = [1, 7, 9]
>>> z
[1, 7, 9]
>>> w = z[:]
>>> z
[1, 7, 9]
>>> w[1] = 22
>>> w
[1, 22, 9]
>>> z
[1, 7, 9]
>>> v = []
>>> v
[]
>>> v[0]
Traceback (most recent call last):
  File "<pyshell#18>", line 1, in <module>
    v[0]
IndexError: list index out of range
>>> ================================ RESTART ================================
>>> 
.
----------------------------------------------------------------------
Ran 1 test in 0.021s

OK
>>> ================================ RESTART ================================
>>> 
.E
======================================================================
ERROR: test_add_two_to_first_two (__main__.TestJuly9)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/sukaeto/test1/july9_tests.py", line 10, in test_add_two_to_first_two
    self.assertEqual(add_two_to_first_two([1, 3, 5]), [3, 5, 5])
  File "/home/sukaeto/test1/july9.py", line 16, in add_two_to_first_two
    new_num += [num +2]
UnboundLocalError: local variable 'new_num' referenced before assignment

----------------------------------------------------------------------
Ran 2 tests in 0.030s

FAILED (errors=1)
>>> ================================ RESTART ================================
>>> 
..
----------------------------------------------------------------------
Ran 2 tests in 0.028s

OK
>>> ================================ RESTART ================================
>>> 
..
----------------------------------------------------------------------
Ran 2 tests in 0.033s

OK
>>> ================================ RESTART ================================
>>> 
Traceback (most recent call last):
  File "/home/sukaeto/test1/july9_tests.py", line 1, in <module>
    from july9 import *
  File "/home/sukaeto/test1/july9.py", line 18
    new_nums = [:]
                ^
SyntaxError: invalid syntax
>>> ================================ RESTART ================================
>>> 
..
----------------------------------------------------------------------
Ran 2 tests in 0.030s

OK
>>> ================================ RESTART ================================
>>> 
.E
======================================================================
ERROR: test_add_two_to_first_two (__main__.TestJuly9)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/sukaeto/test1/july9_tests.py", line 11, in test_add_two_to_first_two
    self.assertEqual(add_two_to_first_two([]), [])
  File "/home/sukaeto/test1/july9.py", line 19, in add_two_to_first_two
    new_nums[0] += 2
IndexError: list index out of range

----------------------------------------------------------------------
Ran 2 tests in 0.030s

FAILED (errors=1)
>>> ================================ RESTART ================================
>>> 
..
----------------------------------------------------------------------
Ran 2 tests in 0.035s

OK
>>> [1, 2, 3] - [2, 3]
Traceback (most recent call last):
  File "<pyshell#19>", line 1, in <module>
    [1, 2, 3] - [2, 3]
TypeError: unsupported operand type(s) for -: 'list' and 'list'
>>> 2 * [2, 4, 5]
[2, 4, 5, 2, 4, 5]
>>> 3 * [2, 4, 5]
[2, 4, 5, 2, 4, 5, 2, 4, 5]
>>> 0 * [2, 4, 5]
[]
>>> x = 'stuff'
>>> x[2] = 'i'
Traceback (most recent call last):
  File "<pyshell#24>", line 1, in <module>
    x[2] = 'i'
TypeError: 'str' object does not support item assignment
>>> type(x[2])
<class 'str'>
>>> x[2]
'u'
>>> x[:4]
'stuf'
>>> x[:-1]
'stuf'
>>> y = [1, 2, 4, 5]
>>> y = y[:2] + [3] + y[2:]
>>> y
[1, 2, 3, 4, 5]
>>> y.insert(2, 7)
>>> y
[1, 2, 7, 3, 4, 5]
>>> ================================ RESTART ================================
>>> 
...
----------------------------------------------------------------------
Ran 3 tests in 0.043s

OK
>>> ================================ RESTART ================================
>>> 
....
----------------------------------------------------------------------
Ran 4 tests in 0.055s

OK
>>>