就是这个函数把变量加入到了local variable里面，所以没初始化local variable是无法运行的。
本地变量（LocalVariable）和全局变量（GlobalVariable）本地变量（LocalVariable）和全局变量（GlobalVariable）
python中直接定义的变量就是本地变量，使用global定义的变量就是全局变量。比如：a = 1b = 1def foo1(): global b #申明使用全局b a = 2 #a是本地变量 b = 2 #b是全局变量foo1()print aprint b 如果解决了您的问题请采纳！如果未解决请继续追问 ...
Python Global variables By: Rajesh P.S.The scope of a variable in Python refers to the part of the code where the variable can be accessed and used. In Python, there are two types of scope: Global scope Local scope Global scope (Global variables): Variables declared outside of any ...
Comparison between Local Variables vs Global Variable is given below: Conclusion In this article we conclude that the global and local variables are both important in their perspective it depends on the program the developer is writing to chose between these variables and sometimes both can be used...
Local variablesBefore learning about the local variable, we should learn about the function block and function parts. There are two parts of the function block (block means region of the function between curly braces in C)Declaration part - Region where we declare all variables which are going ...
•本地变量(LocalVariable)和全局变量(GlobalVariable)是Labview为改善图形化编程灵活性局限而专门设计的两个特殊节点，主要解决数据和对象在同一VI程序中的复用和在不同VI程序中的共享问题。•数组、簇和波形数据是Labview中三类比较复杂的数据类型。5.1本地变量 •本地变量相当于传统编程语言中的局部变量，可以在...
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Nonlocal variable are used in nested function whose local scope is not defined. This means, the variable can be neither in the local nor the global scope. 1 Jul, 2019 24 Global variables are the one that are defined and declared outside a function and we need to use them inside a...
global variable 全局变量；在程序文件中任何地方都可以引用，包括函数和类的内部；但是如果在函数和类中对全局变量赋值，必须在该函数或者类中声明该变量为全局变量，否则经过赋值操作后，变量为本地变量。