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)

本文首发于python黑洞网，博客园同步更新