問題描述

我的應(yīng)用程序有一個(gè)使用 execfile 動態(tài)執(zhí)行 python 腳本的按鈕.如果我在腳本中定義一個(gè)函數(shù)(例如.spam())并嘗試在另一個(gè)函數(shù)中使用該函數(shù)(例如.eggs())，我會收到此錯(cuò)誤:

My application has a button to execute a python script dynamically using execfile. If I define a function inside the script (eg. spam()) and try to use that function inside another function (eg. eggs()), I get this error:

NameError: global name 'spam' is not defined

從 eggs() 中調(diào)用 spam() 函數(shù)的正確方法是什么?

What is the correct way to call the spam() function from within eggs()?

#mainprogram.py
class mainprogram():
    def runme(self):
        execfile("myscript.py")

>>> this = mainprogram()
>>> this.runme()

# myscript.py
def spam():
    print "spam"

def eggs():
    spam()

eggs()

另外，我似乎無法從腳本中的主應(yīng)用程序執(zhí)行方法.即

Also, I can't seem to be able to execute a method from my main application in the script. i.e.

#mainprogram.py
class mainprogram():
    def on_cmdRunScript_mouseClick( self, event ):
        execfile("my2ndscript.py")
    def bleh():
        print "bleh"

 #my2ndscript.py
 bleh()

錯(cuò)誤是:

NameError: name 'bleh' is not defined

從 my2ndscript.py 調(diào)用 bleh() 的正確方法是什么?

What is the correct way to call bleh() from my2ndscript.py?

編輯:更新第一期

推薦答案

第二種情況你需要import(不確定是否mainprogram.py"在你的 $PYTHONPATH)

In the second case you will need import (not sure whether "mainprogram.py" is on your $PYTHONPATH)

#mainprogram.py
class mainprogram:
    def runme(self):
        execfile("my2ndscript.py")
    def bleh(self):
        print "bleh"
if __name__ == '__main__':
    mainprogram().runme()

#my2ndscript.py
import mainprogram
x = mainprogram.mainprogram()
x.bleh()

但這將創(chuàng)建 mainprogram 的第二個(gè)實(shí)例.或者，更好的是:

but this will create a second instance of mainprogram. Or, better yet:

#mainprogram.py
class mainprogram:
    def runme(self):
        execfile("my2ndscript.py", globals={'this': self})
    def bleh(self):
        print "bleh"
if __name__ == '__main__':
    mainprogram().runme()

#my2ndscript.py
this.bleh()

我想 execfile 無論如何都不是解決您問題的正確方法.為什么不使用 import 或 __import__ (以及 reload() 以防腳本在這些點(diǎn)擊之間發(fā)生變化)?

I guess that execfile is not the right solution for your problem anyway. Why don't you use import or __import__ (and reload() in case the script changes between those clicks)?

#mainprogram.py
import my2ndscript

class mainprogram:
    def runme(self):
        reload(my2ndscript)
        my2ndscript.main(self)
    def bleh(self):
        print "bleh"

if __name__ == '__main__':
    mainprogram().runme()

#my2ndscript.py
def main(program):
    program.bleh()

這篇關(guān)于NameError 在 python 中使用 execfile的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！