Python Tkinter按钮动作
我有以下代码:Python Tkinter按钮动作,python,python-2.7,button,tkinter,Python,Python 2.7,Button,Tkinter,我有以下代码: #!/usr/bin/python import Tkinter from tkFileDialog import askopenfilename import tkMessageBox root = Tkinter.Tk() def getFileName(): # show an "Open" dialog box. filename = askopenfilename(filetypes = [('Text files', '*.txt'),('All fil
#!/usr/bin/python
import Tkinter
from tkFileDialog import askopenfilename
import tkMessageBox
root = Tkinter.Tk()
def getFileName():
# show an "Open" dialog box.
filename = askopenfilename(filetypes = [('Text files', '*.txt'),('All files','*')])
btnIco = Tkinter.Button(root, text="Icon", command=getFileName())
btnIco.pack()
root.mainloop()
我打算在单击按钮时运行函数
getFileName
。但是,当代码运行时,函数会运行,单击按钮时,该按钮不会执行任何操作。您能指出哪里出了问题吗?替换以下行:
btnIco = Tkinter.Button(root, text="Icon", command=getFileName())
与:
换句话说,在getFileName
之后删除()
。通过附加()
,在创建按钮之前调用getFileName
,并将函数的返回值用作回调,而不是函数本身。另请参见
btnIco = Tkinter.Button(root, text="Icon", command=getFileName)