我希望有人可以向我解释这种行为。如果我导入一个启动wxpython接口的模块，则在app.MainLoop（）结束之后，线程才能启动。最简单的例子：
simple_app.py
import wx
from threading import Thread
def test():
from time import sleep
while 1:
print("thread still running")
sleep(2)
app = wx.App()
frame = wx.Frame(None, -1, 'simple.py')
frame.Show()
thread = Thread(target=test)
thread.setDaemon(True)
thread.start()
app.MainLoop()
main.py
import simple_app
如果你自己运行simple_app.py它工作正常，如果你运行main.py线程永远不会启动...为什么？我有一种感觉，它与线程无法锁定。
答案 0 :(得分：2)
var appData = {
"HomeGateway": {
"company": "",
"title": {
"english": "",
"spanish": "",
"russian": "",
"otherlanguage": ""
},
"language": "english",
"pressOKQuestion": {
"left": {
"english": "Press ",
"spansih": "",
"russian": ""
},
"right": {
"english": " to move to the next question",
"spanish": "\" to move to the next question",
"russian": ""
}
},
"pressOKMessage": {
"left": {
"english": "Press ",
"spansih": "",
"russian": ""
},
"right": {
"english": " to move on",
"spanish": "\" to move to the next question",
"russian": ""
}
},
"pressUpDown": {
"left": {
"english": "Please press ",
"spanish": "",
"russian": ""
},
"middle": {
"english": " or ",
"spanish": "",
"russian": ""
},
"right": {
"english": " on your remote control to select",
"spanish": "",
"russian": ""
}
},
"questions": [{
"url": "/question/1",
"question": {
"english": "Have you talked to your doctor today?",
"spanish": "",
"russian": ""
},
"view": "views/question.html",
"controller": "loadData",
"nextPage": "#/question/2",
"answers": [{
"id": 1,
"answer": {
"english": "Yes",
"spanish": "Si",
"russian": ""
}
}, {
"answer": {
"english": "No",
"spanish": "No",
"russian": ""
},
"message": "/message/3"
}]
}, {
"url": "/question/2",
"question": {
"english": "On a scale of 0-10, how bad is your pain today?",
"spanish": "",
"russian": ""
},
"icon": "img/icons/1446585749_Doctor_Consultation.png",
"iconSrc": "Broken Arm",
"view": "views/question.html",
"controller": "loadData",
"nextPage": "#/question/3",
"answers": [{
"answer": {
"english": "Low",
"spanish": "",
"russian": ""
},
"category": "1-2"
}, {
"answer": {
"english": "Medium",
"spanish": "",
"russian": ""
},
"category": "3-4"
}, {
"answer": {
"english": "High",
"spanish": "",
"russian": ""
},
"category": "5-8",
"message": "/message/4"
}, {
"answer": {
"english": "Very High",
"spanish": "",
"russian": ""
},
"category": "9-10",
"message": "/message/4"
}]
}, {
"url": "/question/3",
"question": {
"english": "Please enter your systolic blood pressure.",
"spanish": "",
"russian": ""
},
"icon": "img/icons/1446585795_Blood_Pressure_Kit.png",
"iconSrc": "Blood Pressure",
"view": "views/toggle-question.html",
"controller": "loadData",
"nextPage": "#/finished",
"toggle": {
"value": 100,
"max": 500,
"min": 50,
"high": {
"value": 150,
"message": "/message/5"
},
"low": {
"value": 75,
"message": "/message/6"
}
}
}],
"messages": [{
"url": "/message/1",
"message": {
"english": "Please talk to your nurse or doctor about why you do not want to.",
"spanish": "",
"russian": ""
},
"icon": "img/alert-red.png",
"iconSrc": "Alert",
"view": "views/message.html",
"controller": "loadData",
"nextPage": "#/message/2"
}, {
"url": "/message/2",
"message": {
"english": "Good job!",
"spanish": "",
"russian": ""
},
"icon": "img/icons/1446586860_Best_Choice.png",
"iconSrc": "Thumbs Up!",
"view": "views/message.html",
"controller": "loadData",
"nextPage": "#/question/1"
}, {
"url": "/home",
"title": {
"english": "Thank you for being part of today.",
"spanish": "",
"russian": ""
},
"subtitle": {
"english": "Remember this device does not take place of a personal emergency response system or a call to 911.",
"spanish": "",
"russian": ""
},
"view": "views/home.html",
"controller": "loadData",
"nextPage": "#/question/1"
}]
}
};
document.write(appData.HomeGateway.questions.length);
document.write("<br/>");
document.write(appData.HomeGateway.questions);
console.log(appData.HomeGateway.questions.length);
console.log(appData.HomeGateway.questions);中的第二个线程在导入已经运行时尝试导入simple_app.py模块，这导致从主模块导入time时出现死锁。因为导入在导入模块时获取解释器对当前线程的导入锁定。它一直是documented。
主模块中的线程可以导入其他模块，这就是为什么在主模块运行时运行simple_app的原因。将simple_app.py移动到from time import sleep中的模块级别可以解决问题。
运行以下代码有助于更好地理解问题;
my_time.py
simple_app.py
simple_app.py
from time import sleep答案 1 :(得分：1)
这是一个非常有趣的问题。手头的问题不是很明显（至少对我而言）。
simple_app.py 的最后一行阻止，直到frame被关闭/销毁。因此，如果从 main.py 开始，只有框架关闭时，导入才会完成（并显示打印输出）。
请尝试以下方法（通常情况下，您可以更好地构建程序，以便在需要的地方启动/停止应用程序）：
在 simple_app.py 中将最后一行更改为：
if __name__ == '__main__':
app.MainLoop()
在 main.py
中import wx
import simple_app
app = wx.GetApp()
app.MainLoop()
我无法告诉你为什么在直接运行和导入时确实存在差异（直接运行会显示打印结果，但导入不会）。