python 面试题 string int

str1 = 'hello'
str2 = str1
str3 = str1
str4 = str1

str1 = ''

int1 = 1
int2 = int1
int3 = int1
int4 = int1

int1 =123

print 'str2 = ',str2
print 'str1 = ',str1

print 'int2 = ',int2
print 'int1 = ',int1

"""
str2 =  hello
str1 =  
int2 =  1
int1 =  123
"""