import sys; print('%s %s' % (sys.executable or sys.platform, sys.version))
C:\Python27\python.exe 2.7.2 |EPD 7.1-2 (32-bit)| (default, Jul  3 2011, 15:13:59) [MSC v.1500 32 bit (Intel)]
[v for v in nums]
Traceback (most recent call last):
  File "<console>", line 1, in <module>
NameError: name 'nums' is not defined
nums = [8, 3, 5, 4, 1]
[v for v in nums]
[8, 3, 5, 4, 1]


[2 for v in nums]
[2, 2, 2, 2, 2]


[v*2 for v in nums]
[16, 6, 10, 8, 2]


[j+1 for j in range(20) if (j%3)==0]
[1, 4, 7, 10, 13, 16, 19]


print range(20)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]