我的理解是Python字符串是不可变的。
我尝试了以下代码:
a = "Dog"
b = "eats"
c = "treats"
print a, b, c
# Dog eats treats
print a + " " + b + " " + c
# Dog eats treats
print a
# Dog
a = a + " " + b + " " + c
print a
# Dog eats treats
# !!!
Python不应该阻止赋值吗?我可能漏掉了什么。
有什么想法吗?
https://stackoverflow.com/questions/9097994
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