我正在尝试使用tkinter构建一个简单的GUI,允许用户使用文件浏览器窗口选择文件,这将是另一个python脚本的输入。我想要一个Entry小部件,该控件允许用户手动输入文件路径。如果用户决定从浏览器中选择文件而不是输入文件,我希望Entry小部件显示选定的文件路径。
下面的代码可以构建表单(我没有对小部件进行太多格式化)并显示文件对话框窗口。使用函数“ show_file_browser”,我可以返回整个文件路径。我遇到的问题是将该文件路径粘贴到Entry小部件中。
我当前收到的错误是:
NameError: name 'filepath' is not defined
这是从“ first_browser”函数引发的。因为“文件路径”是在“ init_window”函数中声明的,所以当我尝试在“ first_browser”中进行设置时,它是未定义的。除了将'filepath'设置为全局变量(我不确定是否可以解决问题)之外,还有没有简便的方法可以完成我尝试的任务?
import tkinter as tk
from tkinter import filedialog
class Window(tk.Frame):
def __init__(self, master = None):
tk.Frame.__init__(self, master)
self.master = master
self.init_window()
def init_window(self):
self.master.title("Form Title")
self.pack(fill = 'both', expand = 1)
filepath = tk.StringVar()
quitButton = tk.Button(self, text = 'Quit',
command = self.close_window)
quitButton.place(x = 0, y = 0)
browseButton = tk.Button(self, text = 'Browse',
command = self.first_browser)
browseButton.place(x = 0, y = 30)
filepathText = tk.Entry(self, textvariable = filepath)
filepathText.pack()
def close_window(self):
form.destroy()
def show_file_browser(self):
self.filename = filedialog.askopenfilename()
return self.filename
def first_browser(self):
filepath.set = self.show_file_browser()
form = tk.Tk()
form.geometry("250x250")
form.resizable(0, 0)
app = Window(form)
form.mainloop()
答案 0 :(得分:1)
尝试一下
class Window(tk.Frame):
def __init__(self, master = None):
tk.Frame.__init__(self, master)
self.master = master
self.init_window()
def init_window(self):
self.master.title("Form Title")
self.pack(fill = 'both', expand = 1)
self.filepath = tk.StringVar()
quitButton = tk.Button(self, text = 'Quit',
command = self.close_window)
quitButton.place(x = 0, y = 0)
browseButton = tk.Button(self, text = 'Browse',
command = self.first_browser)
browseButton.place(x = 0, y = 30)
filepathText = tk.Entry(self, textvariable = self.filepath)
filepathText.pack()
def close_window(self):
form.destroy()
def show_file_browser(self):
self.filename = filedialog.askopenfilename()
return self.filename
def first_browser(self):
file = self.show_file_browser()
self.filepath.set(file)
要在类内创建"global" variable
,必须在变量名称前添加self.
。
在您的代码中,您在first_browser(self)
函数内部编写了代码
filepath.set = self.show_file_browser()
,但是您不能执行此操作,必须先获取self.show_file_browser()
返回的值,然后执行value=self.show_file_browser()
,然后再将输入变量设置为该值
答案 1 :(得分:0)
“如果用户决定从浏览器中选择文件而不是输入文件,我希望 Entry 小部件显示选定的文件路径。”
此问题的解决方法如下: 您可以根据需要将代码实施到您的项目中。
from tkinter import messagebox
from tkinter import filedialog
def fileNameToEntry():
files = [('All Files', '*.*'),
('Python Files', '*.py'),
('Text Document', '*.txt')]
filename = filedialog.askopenfilename(initialdir = "/",
title = "Select a File",
filetypes = files,
defaultextension = files)
filename = filename.strip()
#User select cancel
if (len(filename) == 0):
messagebox.showinfo("show info", "you must select a file")
return
#selection go to Entry widget
else:
myStrVar.set(filename)
root = Tk()
root.title("select and show file path in Entry widget")
lblFileName = Label(root, text = "Selected File Name", width = 24)
lblFileName.grid(padx = 3, pady = 5, row = 0, column = 0)
#make global variable to access anywhere
global myStrVar
myStrVar = StringVar()
txtFileName = Entry(root, textvariable = myStrVar, width = 60, font = ('bold'))
txtFileName.grid(padx = 3, pady = 5, row = 0, column = 1)
btnGetFile = Button(root, text = "Get File Name", width = 15,
command = fileNameToEntry)
btnGetFile.grid(padx = 5, pady = 5, row = 1, column = 0)
root.mainloop()