global

问题 What is the reason of having globals() function in Python? It only returns dictionary of global variables, which are already global, so they can be used anywhere... I'm asking only out of curiosity, trying to learn python. def F(): global x x = 1 def G(): print(globals()["x"]) #will return value of global 'x', which is 1 def H(): print(x) #will also return value of global 'x', which, also, is 1 F() G() H() I can't really see the point here? Only time I would need it, was if I had local and

问题 There is a past question on this topic, but no answer was posted: How do you import a Typescript type definition file whose top level element is a non-exported namespace? I want to make a type for testdouble-jest , but the second argument in its exported function is the global jest instance, which is declared in @types/jest as a top-level declared namespace: declare namespace jest { mock(): something // ... } EDIT: here are the types: https://github.com/DefinitelyTyped/DefinitelyTyped/blob

问题 There is a past question on this topic, but no answer was posted: How do you import a Typescript type definition file whose top level element is a non-exported namespace? I want to make a type for testdouble-jest , but the second argument in its exported function is the global jest instance, which is declared in @types/jest as a top-level declared namespace: declare namespace jest { mock(): something // ... } EDIT: here are the types: https://github.com/DefinitelyTyped/DefinitelyTyped/blob

问题 how to reuse the same item in multiple tab so that when that item change, other tab will reflect the changes i try this code but the label in first tab not shown: var label = Ext.create('Ext.form.Label', { text : 'mylabel' }); Ext.onReady(function() { Ext.create('Ext.tab.Panel', { width : 200, height : 200, renderTo : Ext.getBody(), items : [{ title : 'tab1', items : [label, { xtype : 'button', handler : function() { label.setText('changed from tab1'); } }] }, { title : 'tab2', items : [label

问题 I have a class instance that needs to be accessed by some other classes. It would be quite cumbersome to pass the instance always down the construction chain. I tried to avoid global variable, since people tend to advise against this. I thought I declare this instance a static member of a class and then include this class in order to access the instance but this does not work either error: calling a private constructor of class 'Foo' To specify the problem further in the context of the

问题 I'm trying to use Tornado with SqlAlchemy, I need to pass the current user from RequestHandler (tornado) to models (SqlAlchemy) in the insert or update action. But I don't want to pass the value directly to the model, example: #### RequestHandler POST method... user = Session.query(User).get(1) user.name = "bla, bla, bla..." user.updated_by = self.current_user # don't use... session.commit() I'm using a global variable, in a __ init__.py file, and set the current user value in the

问题 The manual on "extract" shows you can extract an array like: extract(array('one'=>1,'two'=>2)); into $one,$two... But the extract function doesn't return the variables. Is there a way to 'globalize' these variables? Maybe not using extract, but a foreach loop? EDIT: (explanation about what I'm trying to achieve) I have an array containing hundreds of output messages which I want to have accessible as variables efficiently. What I mean is that whenever I want to output a message, say:

问题 how can i require a module globally so i can use it in different modules without having to require it again? or do i just have to do that everytime? is there any best practice for this? heres an example of what i am talking about. lets say i have an index.js like this: var a = require('a.js'), utils = require('utils.js'); var str = 'hello this is a test'; str = a.change(str); utils.return(str); a.js var utils = require('utils.js'); exports.change = function(str) { str = str.replace('test',

问题 how can i require a module globally so i can use it in different modules without having to require it again? or do i just have to do that everytime? is there any best practice for this? heres an example of what i am talking about. lets say i have an index.js like this: var a = require('a.js'), utils = require('utils.js'); var str = 'hello this is a test'; str = a.change(str); utils.return(str); a.js var utils = require('utils.js'); exports.change = function(str) { str = str.replace('test',

问题 I have been trying to figure out how to display static variables in the eclipse variable window for the CDT and can't figure out how. The menu button for the CDT doesn't seem to have the java->globals menu. How do I display static/global variables in eclipse CDT debugger? 回答1: Window -> Show View -> Expressions You can add any expression there, so also global variables. 回答2: Arrow down button > Java > Show Constants / Show Static Variables 来源： https://stackoverflow.com/questions/4434107/how