49 lines
1.1 KiB
Python
49 lines
1.1 KiB
Python
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"""
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不使用多线程的情况 - 耗时间的任务阻塞主事件循环
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Version: 0.1
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Author: 骆昊
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Date: 2018-03-20
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"""
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import time
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import tkinter
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import tkinter.messagebox
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def download():
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# 模拟下载任务需要花费10秒钟时间
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time.sleep(10)
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tkinter.messagebox.showinfo('提示', '下载完成!')
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def show_about():
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tkinter.messagebox.showinfo('关于', '作者: 骆昊(v1.0)')
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def main():
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top = tkinter.Tk()
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top.title('单线程')
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top.geometry('200x150')
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top.wm_attributes('-topmost', True)
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panel = tkinter.Frame(top)
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button1 = tkinter.Button(panel, text='下载', command=download)
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button1.pack(side='left')
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button2 = tkinter.Button(panel, text='关于', command=show_about)
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button2.pack(side='right')
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panel.pack(side='bottom')
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tkinter.mainloop()
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if __name__ == '__main__':
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main()
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# 在不使用多线程的情况下 一旦点击下载按钮 由于该操作需要花费10秒中的时间
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# 整个主消息循环也会被阻塞10秒钟无法响应其他的事件
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# 事实上 对于没有因果关系的子任务 这种顺序执行的方式并不合理
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