NameError:未定义名称“__main__”

时间:2014-02-18 22:38:27

标签: python main maya

我一直在这里阅读,但我无法在网上找到解决问题的任何解决方案。我想我的缩进是正确的,但我仍然得到名称错误。有人可以帮助我。 这个脚本应该在maya中运行一个新的面板,它的工作类型,但错误真的很烦人。

class PanelWindow( object ):
    def __init__( self, name, title, namespace=__name__ ):
        self.__name__ = name
        self._title = title
        self.instance = str(namespace) + '.' + self.__name__

        if not pm.scriptedPanelType(self.__name__, q = True, ex = True):
            pm.scriptedPanelType(self.__name__, u = True)

        jobCmd = 'python(\\\"%s._setup()\\\")' % self.instance
        job = "scriptJob -replacePrevious -parent \"%s\" -event \"SceneOpened\" \"%s\";" % ( self.__name__, jobCmd )
        mel.eval(job)

        pm.scriptedPanelType( self.__name__, e = True,
                       unique=True,
                       createCallback = 'python("%s._createCallback()")' % self.instance,
                       initCallback = 'python("%s._initCallback()"  )' % self.instance,
                       addCallback = 'python("%s._addCallback()"   )' % self.instance,
                       removeCallback = 'python("%s._removeCallback()")' % self.instance,
                       deleteCallback = 'python("%s._deleteCallback()")' % self.instance,
                       saveStateCallback = 'python("%s._deleteCallback()")' % self.instance
                        )


    def _setup(self):
        """Command to be call for new scene"""
        panelName = pm.sceneUIReplacement( getNextScriptedPanel=(self.__name__, self._title) )
        if panelName == '':
            try:
                panelName = pm.scriptedPanel( mbv=1, unParent=True, type=self.__name__, label=self._title )
            except:
                pass
        else:
            try:
                label = panel( self.__name__, query=True, label=True )
                pm.scriptedPanel( self.__name__, edit=True,  label=self._title )
            except:
                pass
    def _addCallback(self):
        """Create UI and parent any editors."""
        print 'ADD CALLBACK'
    def show( self ):        
        mel.eval('tearOffPanel "%s" %s true;' % (self._title, self.__name__) )


global test
test = PanelWindow('myName', 'Light')

test.show()


# NameError: name '__main__' is not defined # 
# Error: line 1: name '__main__' is not defined
# Traceback (most recent call last):
#   File "<maya console>", line 1, in <module>
# NameError: name '__main__' is not defined # 

2 个答案:

答案 0 :(得分:12)

执行Python脚本时,Python解释器将名为__name__的变量设置为正在执行的模块的字符串值"__main__"(通常此变量包含模块名称)。

通常检查此变量的值以查看是否正在导入模块以用作库,或者是否直接执行该模块。所以你经常在模块的末尾看到这段代码:

if __name__ == '__main__':
    # do stuff

我怀疑你从'__main__'中删除了字符串引号,这给出了你正在看的NameError

>>> if __name__ == __main__:
...     pass
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name '__main__' is not defined

答案 1 :(得分:4)

你的问题是一些问题,我只提供了代码的一些基本部分,因为其余部分不需要。

问题一是__name__,如果引用它,我们就不会有问题,因为它只是一个名字而不是什么特别的,我只是将其重命名为name

问题二是面板/面板类型上的重复名称。 IE:

pm.scriptedPanelType(self.__name__, u = True)
pm.scriptedPanel( self.__name__, edit=True,  label=self._title )

Maya不喜欢panelType和面板具有相同的名称。

所以:

import maya.cmds as cmds
import pymel.core as pm
import maya.mel as mel

class PanelWindow( object ):
    def __init__(self, name, title):

        self._name = name
        self._title = title
        self.panelTypeName = self._name + "Type"



        if not pm.scriptedPanelType(self.panelTypeName, query=True, exists=True):
            pm.scriptedPanelType(self.panelTypeName, unique=True)

        if not pm.scriptedPanel(self._title, query=True, exists=True):
            ## Only allows one instance
            pm.scriptedPanel(self._title, menuBarVisible=1, unParent=True, type=self.panelTypeName, label=self._title )

    def _addCallback(self):
        """Create UI and parent any editors."""
        print 'ADD CALLBACK'        


    def show( self ):  
        mel.eval('tearOffPanel "%s" "%s" true;' % (self._title, self._name) )  



PanelWindow('lightControlType1', 'lightControl').show()