Python双重打印功能，我不明白这个例子是如何工作的
[英]Python double print function, I don't understand how this example works
问题描述
Why does the code?
为什么是代码？
print(print("Hello"))
send back to the user.发回给用户。
hello
none
I don't get it.我不明白。
1 个解决方案
解决方案1
0 2021-11-08 14:59:59
print is function which does return None and have side effect of printing print是return None并具有打印副作用的函数
print("Hello")
does print Hello and return None so external print does "see" that its' 1st argument is None and print that确实打印Hello并return None所以外部print确实“看到”它的'第一个参数是None并打印
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