# [from:to:step] from include，to not include,step default is 1. ( Nagetive sign refer than the direction is from right to left.)

s1 = (2, 1.3, 'love', 5.6, 9, 12, False)

s2 = [True, 5, 'smile']

print s1==s1[:] #default is the list

print s1[:5] # 前5个

print s1[2:] # 从第3开始

print s1[0:5:2] #每两个

print s1[2:0:-1] # not include s1[0] ,because 0 is the TO.

# 倒序引用

print s2[-1]

print s2[1] == s2[-2]

# String is a tuple ,can't modify the char.

str = 'abcdef'

print str[2:4],type(str)

#str[0] = 'z' will throw

# 添加元素,需要调用 append

s2.append('pzdndd')

print s2[-1] == 'pzdndd'

print 3**4 # 乘方 81

print 5 in [1,3,5] #

print
True
and
False

print
True
or
False

print
not
True