python 内存管理

• 小整数缓存池

a = 1
b = 1
print(a is b) # True

• 短字符串

 

# True
a = "good"
b = "good"
print(a is b)

# False
a = "very good morning"
b = "very good morning"
print(a is b)

# False
a = []
b = []
print(a is b)

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