使用 tkinter 将文件路径保存在变量中

Question

我正在使用 tkinter 为我拥有的旧脚本创建 GUI，但我现在卡住了。 我想单击一个按钮打开“搜索文件”窗口，选择一个特定文件并将其路径保存在变量中。 我拥有的代码能够打开窗口，然后我可以选择文件并显示它的路径，但我找不到将此路径保存在变量中的方法。 这就是我所拥有的：

from tkinter import *
from tkinter import filedialog

def get_file_path():
    # Open and return file path
    file_path= filedialog.askopenfilename(title = "Select A File", filetypes = (("mov files", "*.png"), ("mp4", "*.mp4"), ("wmv", "*.wmv"), ("avi", "*.avi")))
    l1 = Label(window, text = "File path: " + file_path).pack()

window = Tk()
# Creating a button to search the file
b1 = Button(window, text = "Open File", command = get_file_path).pack()
window.mainloop()

有谁知道这样做的好方法吗？

Answer 1

使用全局变量：

from tkinter import *
from tkinter import filedialog

def get_file_path():
    global file_path
    # Open and return file path
    file_path= filedialog.askopenfilename(title = "Select A File", filetypes = (("mov files", "*.png"), ("mp4", "*.mp4"), ("wmv", "*.wmv"), ("avi", "*.avi")))
    l1 = Label(window, text = "File path: " + file_path).pack()

window = Tk()
# Creating a button to search the file
b1 = Button(window, text = "Open File", command = get_file_path).pack()
window.mainloop()
print(file_path)

关闭窗口后，您将获得文件路径。

Answer 2

您可以在get_file_path 中将file_path 声明为全局变量

def get_file_path():
    global file_path
    # Open and return file path
    file_path= filedialog.askopenfilename(title = "Select A File", filetypes = (("mov files", "*.png"), ("mp4", "*.mp4"), ("wmv", "*.wmv"), ("avi", "*.avi")))
    l1 = Label(window, text = "File path: " + file_path).pack()

然后您可以从脚本中的任何位置访问该变量

-----编辑------ 根据您在评论中所说的，我说您可以使用tkinter.StringVar 保存文件路径，然后在以后调用count_frames 作为参数时访问它。

可以这样实现：

from tkinter import *
from tkinter import filedialog

file_path_var = StringVar()

def get_file_path():
    # Open and return file path
    file_path= filedialog.askopenfilename(title = "Select A File", filetypes = (("mov files", "*.png"), ("mp4", "*.mp4"), ("wmv", "*.wmv"), ("avi", "*.avi")))
    file_path_var.set(file_path) #setting the variable to the value from file path
    #Now the file_path can be acessed from inside the function and outside
    file_path_var.get() # will return the value stored in file_path_var
    l1 = Label(window, text = "File path: " + file_path).pack()

window = Tk()
# Creating a button to search the file
b1 = Button(window, text = "Open File", command = get_file_path).pack()
# will also return the value saved in file_path_var
file_path_var.get()
window.mainloop()
print(file_path)

所以现在你的count_frames 函数在哪里，只要你先选择了一个文件，你就应该可以这样做

count_frames(file_path_var.get())