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Scope defines where in a program a variable is accessible. Ruby has four types of variable scope, local,global, instance and class. In addition, Ruby has one constant type. Each variable type is declared by using a special character at the start of t…
翻译自:https://stackoverflow.com/questions/35919020/whats-the-difference-of-name-scope-and-a-variable-scope-in-tensorflow 问题:下面这几个函数的区别是什么? tf.variable_op_scope(values, name, default_name, initializer=None) Returns a context manager for defining an op t…
TF有两个scope, 一个是name_scope一个是variable_scope 第一个程序: with tf.name_scope("hello") as name_scope: arr1 = tf.get_variable("arr1", shape=[2,10],dtype=tf.float32) print name_scope # "hello/"  print arr1.name # arr1:0  print "sco…
举例说明 TensorFlow中的变量一般就是模型的参数.当模型复杂的时候共享变量会无比复杂. 官网给了一个case,当创建两层卷积的过滤器时,每输入一次图片就会创建一次过滤器对应的变量,但是我们希望所有图片都共享同一过滤器变量,一共有4个变量:conv1_weights,conv1_biases,conv2_weights, and conv2_biases. 通常的做法是将这些变量设置为全局变量.但是存在的问题是打破封装性,这些变量必须文档化被其他代码文件引用,一旦代码变化,调用方也可能需要…
原文: https://phppot.com/php/variable-scope-in-php/ Last modified on March 24th, 2017 by Vincy. ------------------------------------------------------- variable scope is known as its boundary within which it can be visible or accessed from code. In oth…
import tensorflow as tf def f(): var = tf.Variable(initial_value=tf.random_normal(shape=[2])) return var a1=f() a2=f() with tf.Session() as sess: sess.run(tf.global_variables_initializer()) print(sess.run(a1)) print(sess.run(a2)) 输出为: [-0.74532765 -1…
http://www.crifan.com/summary_python_variable_effective_scope/ 解释python中变量的作用域 示例: 1.代码版 #!/usr/bin/python # -*- coding: utf-8 -*- """ ------------------------------------------------------------------------------- Function: [整理]Python中:sel…
在这篇文章中,我会试图讲解JavaScript变量的作用域和声明提升,以及许多隐隐藏的陷阱.为了确保我们不会碰到不可预见的问题,我们必须真正理解这些概念. 基本定义 作用范围是个“木桶”,里面装着变量.变量可以是局部或者全局性的,但在子范围中定义的变量是可以访问父范围的,这一点可能会造成一些困扰. 在JavaScript中使用"var"关键字声明变量.一旦在父范围宣声明,就会作为各自子范围的一部分.即在本地范围内有效,但本地定义的变量不可在全局范围内访问. 让我们来看一个例子.执行下面…
Python中的变量的作用域有时会让像我这样的初学者很头疼. 其实只需要掌握以下两点: 1. Python能够改变变量作用域的代码段是def.class.lamda;    而if/elif/else.try/except/finally.for/while 并不能更改变量作用域. 示例略 2. 变量搜索路径是:本地变量 -> 上层变量 示例如下: def accessOut(): print(outVar) outVar = 10 accessOut() 在上例中,def改变了变量的作用域.…
python 中变量的作用域经常让我感到很迷 In Python, on the other hand, variables declared in if-statements, for-loop blocks, and while-loop blocks are not local variables, and stay in scope outside of the block. Thus we say that C++ has "block-level" scoping, whi…