名称 'xxx' 未定义 [英] Name 'xxx' is not defined

问题描述

为什么这两个函数不行?

类窗口(QtGui.QMainWindow):def __init__(self):super(Window, self).__init__()self.setGeometry(500, 150, 500, 600)self.home()定义家(自己):btn_run = QtGui.QPushButton("Run", self)btn_run.clicked.connect(self.run)btn_run.resize(120, 40)btn_run.move(220, 540)自我展示()def view_splash(arg1):label = QLabel("" + n[arg1] + "")label.setWindowFlags(Qt.SplashScreen | Qt.WindowStaysOnTopHint)标签.show()QtCore.QTimer.singleShot(10000, label.hide)定义运行(自我):对于 i 在范围内(len(行)):n = random.choice(words)view_splash(0)view_splash(1)时间.睡眠(600)

我有那个错误:

 view_splash(0)NameError:未定义名称view_splash"

我做错了什么?这应该是什么样子?

解决方案

在python中，需要使用self来访问同一对象的其他方法和属性.当您简单地调用view_splash 时，python 会查找函数定义，但不会查看Window 的方法.通过显式地在 view_splash 前面加上 self. 前缀，python 就知道你想要方法 Window.view_splash 并且它应该像你期望的那样工作.>

因此，对于您的特定代码，这需要您将 run 方法更新为以下内容:

def run(self):对于 i 在范围内(len(行)):n = random.choice(words)self.view_splash(0)self.view_splash(1)时间.睡眠(600)

我假设在类的外部还有额外的代码，它定义了lines和words作为全局变量，Window.run 然后就可以访问了.

Why these two function want not work ?

class Window(QtGui.QMainWindow):

 def __init__(self):
    super(Window, self).__init__()
    self.setGeometry(500, 150, 500, 600)
    self.home()

 def home(self):

    btn_run = QtGui.QPushButton("Run", self)
    btn_run.clicked.connect(self.run)
    btn_run.resize(120, 40)
    btn_run.move(220, 540)

    self.show()

 def view_splash(arg1):
    label = QLabel("<font color=red size=10<b>" + n[arg1] + "</b></font>")
    label.setWindowFlags(Qt.SplashScreen | Qt.WindowStaysOnTopHint)
    label.show()
    QtCore.QTimer.singleShot(10000, label.hide)

 def run(self):
    for i in range(len(lines)):
        n = random.choice(words)
        view_splash(0)
        view_splash(1)
        time.sleep(600)

I have that error:

  view_splash(0)
NameError: name 'view_splash' is not defined

What I'm doing wrong ? How this should look like ?

解决方案

In python, it is necessary to use self to access other methods and attributes of the same object. When you simply call view_splash, python looks for the function definition but will not look at the methods of Window. By explicitly prefixing view_splash with self., python then knows that you want the method Window.view_splash and it should work as you expect.

So for your specific code, this would require you to update your run method to be the following:

def run(self):
    for i in range(len(lines)):
        n = random.choice(words)
        self.view_splash(0)
        self.view_splash(1)
        time.sleep(600)

I'm assuming that there is additional code outside of the class which defines lines and words as global variables which Window.run can then access.

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