问题描述
我的应用程序有一个使用 execfile 动态执行 python 脚本的按钮.如果我在脚本中定义一个函数(例如.spam())并尝试在另一个函数中使用该函数(例如.eggs())，我会收到此错误:
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
从 eggs() 中调用 spam() 函数的正确方法是什么?
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，我似乎无法从脚本中的主应用程序执行方法.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()
错误是:
NameError: name 'bleh' is not defined
从 my2ndscript.py 调用 bleh() 的正确方法是什么?
What is the correct way to call bleh() from my2ndscript.py?
编辑:更新第一期
推荐答案
第二种情况你需要import(不确定是否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()
但这将创建 mainprogram 的第二个实例.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 无论如何都不是解决您问题的正确方法.为什么不使用 import 或 __import__ (以及 reload() 以防脚本在这些点击之间发生变化)?
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()
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