每次在 Entry 文本值中移动<keyrealase>事件发生</keyrealase>

Question

I created an Entry to select an xlsx file from keyboard or file browser.

If this one has an xlsx extension and that it exists in the file explorer so I color it in black, otherwise in red.

check_entries allows me to check the file each time a key is pressed when the Entry has focus.

self.entries['entry1'] = Entry(inputs_frame, width=90, state=DISABLED)

self.entries['entry1'].bind("<KeyRelease>", lambda event: self.check_entries(event, self.entries['entry1']))

def check_entries(self, event, entry):

    entry.config(text=event.widget.get())
    all_entry_compliant = True

    for key, entry in self.entries.items():
        entry_compliant = True
        if key != 'report_file_pathname_entry':
            if os.path.exists(entry['text']) == False:
                entry_compliant = False
                all_entry_compliant = False

        if os.path.splitext(entry['text'])[1] != '.xlsx':
            entry_compliant = False
            all_entry_compliant = False

        if entry_compliant:
            entry.configure(fg='black')
        else:
            entry.configure(fg='red')

    if all_entry_compliant:
        self.buttons['launch_btn'].configure(state=NORMAL)
    else:
        self.buttons['launch_btn'].configure(state=DISABLED)

I don't understand why this writes the text with an offset. I alose tried to use <Key>, <FocusOut> event and to filter pressed key with regular expression.

After selected xlsx file from file browser

After erase the letter 'o'

After rewrite the letter 'o'

After press left arrow key without pressed 'o'

#(Edit) Adding of minimable reproducible example

import tkinter as tk

def check_entries(event, entry):
    entry.config(text=event.widget.get())

root = tk.Tk()
entries = {}
entries['entry1'] = tk.Entry(root, width=90)
entries['entry1'].pack()

entries['entry1'].bind("<KeyRelease>", lambda event: check_entries(event, entries['entry1']))
root.mainloop() 

If you try this code, when you press any letter or spam arrow on your keyboard, entry's text will take his old value.

Answer 1

When you do entry.config(text=event.widget.get()) , you are not changing the text in the entry widget. The widget does not have a text attribute. When you use text , tkinter interprets that as an abbreviation for textvariable . So, you are just setting textvariable to the value in the widget.

If you want to modify the entry widget, you can use the delete method to delete the text, and insert to insert new data.

For example, to replace the contents of entry with the text "hello, world", you can do it like this:

entry.delete(0, "end")
entry.insert(0, "hello, world")

In your example you're attempting to replace the text with what is already there, so I'm not sure what you're actually wanting to replace it with. It seems pointless to delete and just re-insert the same text.