Panda3D 出现错误答案

【问题标题】：Error on Panda3DPanda3D 出现错误
【发布时间】：2013-12-25 06:40:54
【问题描述】：

我正在尝试制作截图功能，但每次我尝试时，它都会给我这个错误：

Traceback (most recent call last):
  File "C:\Panda3D-1.8.1\direct\showbase\EventManager.py", line 61, in eventLoop
Task
    self.doEvents()
  File "C:\Panda3D-1.8.1\direct\showbase\EventManager.py", line 55, in doEvents
    processFunc(self.eventQueue.dequeueEvent())
  File "C:\Panda3D-1.8.1\direct\showbase\EventManager.py", line 122, in processE
vent
    messenger.send(eventName, paramList)
  File "C:\Panda3D-1.8.1\direct\showbase\Messenger.py", line 397, in send
    self.__dispatch(acceptorDict, event, sentArgs, foundWatch)
  File "C:\Panda3D-1.8.1\direct\showbase\Messenger.py", line 482, in __dispatch
    method (*(extraArgs + sentArgs))
  File "C:\Panda3D-1.8.1\direct\showbase\ShowBase.py", line 2317, in __oobeButto
n
    messenger.send(button + suffix)
  File "C:\Panda3D-1.8.1\direct\showbase\Messenger.py", line 397, in send
    self.__dispatch(acceptorDict, event, sentArgs, foundWatch)
  File "C:\Panda3D-1.8.1\direct\showbase\Messenger.py", line 482, in __dispatch
    method (*(extraArgs + sentArgs))
TypeError: Screenie() takes exactly 1 argument (0 given)
:task(error): Exception occurred in PythonTask eventManager
Traceback (most recent call last):
  File "Play.py", line 791, in <module>
    run()
  File "C:\Panda3D-1.8.1\direct\showbase\ShowBase.py", line 2921, in run
    self.taskMgr.run()
  File "C:\Panda3D-1.8.1\direct\task\Task.py", line 502, in run
    self.step()
  File "C:\Panda3D-1.8.1\direct\task\Task.py", line 460, in step
    self.mgr.poll()
  File "C:\Panda3D-1.8.1\direct\showbase\EventManager.py", line 61, in eventLoop
Task
    self.doEvents()
  File "C:\Panda3D-1.8.1\direct\showbase\EventManager.py", line 55, in doEvents
    processFunc(self.eventQueue.dequeueEvent())
  File "C:\Panda3D-1.8.1\direct\showbase\EventManager.py", line 122, in processE
vent
    messenger.send(eventName, paramList)
  File "C:\Panda3D-1.8.1\direct\showbase\Messenger.py", line 397, in send
    self.__dispatch(acceptorDict, event, sentArgs, foundWatch)
  File "C:\Panda3D-1.8.1\direct\showbase\Messenger.py", line 482, in __dispatch
    method (*(extraArgs + sentArgs))
  File "C:\Panda3D-1.8.1\direct\showbase\ShowBase.py", line 2317, in __oobeButto
n
    messenger.send(button + suffix)
  File "C:\Panda3D-1.8.1\direct\showbase\Messenger.py", line 397, in send
    self.__dispatch(acceptorDict, event, sentArgs, foundWatch)
  File "C:\Panda3D-1.8.1\direct\showbase\Messenger.py", line 482, in __dispatch
    method (*(extraArgs + sentArgs))
TypeError: Screenie() takes exactly 1 argument (0 given)

这是截图的部分

def Screenie(self):
file_name = Filename('whatever.png')

self.win.saveScreenshot(file_name)

  base.accept('f9', Screenie)

谁能告诉我它有什么问题？我正在尝试修复它，但不知道该怎么做...

【问题讨论】：

标签： python panda3d

【解决方案1】：

错误很明显

TypeError: Screenie() takes exactly 1 argument (0 given)

您的 Screenie 函数接受一个参数 (self)，但无论调用它，都没有提供任何参数（即 Screenie() 而不是 Screenie(obj)）。

您选择self 作为Screenie 的参数让我觉得它是一个类方法。在那种情况下，你应该有这样的东西。

class SomeCLass(object):
    # <snip>
    def Screenie(self):
        file_name = Filename('whatever.png')
        self.win.saveScreenshot(file_name)

# Create instance
instance = SomeClass()

# Bind keypress to bound method on instance
base.accept('f9', instance.Screenie)

这确保Screenie 的self 参数绑定到instance 对象，并且您的代码应该可以工作。

【讨论】：