python中==和is的区别

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1、测试a = [11,22,33]
d = [11,22,33]
b = a
a == d   # 结果是True
a is d     # 结果是False 
a == b   # 结果是True
a is b     # 结果是True
c = copy.deepcopy(a)
a == c   # True
a is c     #False
总结：is是比较两个引用是否指向了同一个对象；==是比较两个对象是否相等
2、is在数字中的区别
a = -5
b = -5
a == b       #True
a is b         #True
a = -6
b = -6
a is b         #False
a = 256 
b = 256 
a is b         #True
a = 257
b = 257
a is b        #False
总结：在数字-5到256之间两者可以用is超出范围为False