如何在本地增加全局变量的数量？

发布于 2024-11-03 13:43:15 字数 409 浏览 2 评论 0原文

我正在使用 PyQt 编写一个程序，并且试图找出一种方法，以便在每次单击特定按钮时不断添加到全局变量。这样，如果我的全局值是 0，那么第三次单击按钮时，我的全局值将等于 3。这是相关代码。

# from the main window class

QtCore.QObject.connect(self.pushButton_17, QtCore.SIGNAL("clicked()"), self.CadDraw)

def CadDraw(self):
    myGlobal +=1 #the previous value from the last time CadDraw was called plus 1
    DoStuff()

这在 C 语言中相当简单，但我对 python 方法完全空白，我似乎记得它非常相似。

原文

I'm writing a program using PyQt and I'm trying to figure out a way to keep adding to a global variable every time a particular button is clicked. This way if my global is 0 then the third time the button is clicked my global would equal 3. Here's the relevant code.

# from the main window class

QtCore.QObject.connect(self.pushButton_17, QtCore.SIGNAL("clicked()"), self.CadDraw)

def CadDraw(self):
    myGlobal +=1 #the previous value from the last time CadDraw was called plus 1
    DoStuff()

This is pretty easy in C but I'm completely blanking on the python method which I seem to recall was very similiar.

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素年丶 2024-11-10 13:43:15

使用全局语句

global myGlobal
myGlobal = 0
def CadDraw(self):
    global myGlobal
    myGlobal +=1 [the previous value from the last time CadDraw was called plus 1]
    DoStuff()

use the global statement

global myGlobal
myGlobal = 0
def CadDraw(self):
    global myGlobal
    myGlobal +=1 [the previous value from the last time CadDraw was called plus 1]
    DoStuff()

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