Python: Assignment statement

Abstract: Skills related to assignment statement

1.exchange the objects

>>> x=1

>>> y=20

>>> x, y = y , x

>>> print x, y

20 1

2. initiate a list with replicates

>>> a=[0]*10

>>> print a

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

writing date: 20150522