#coding=utf-8 
int = 1
float = 0.1
string = 'I\'m string'
bool = True
null = None
print True and True
print False or False
print not True
print null
90
a = 'ABC'
b = a
a = 'XYZ'
print b

print 10/3
print 10.0/3

print '中文'

print 'string is %s, int is %000d, float is %.10f' % ('aaa', 1, 0.2)

print 'growth rate: %d %%' % 7