ttk.Entry：如果文本右对齐，则看不到尖号

Question

When ttk.Entry['justify']='right' is set the caret cannot be seen when the window shows up.
Hence any user identifies the focused entry widget by seeing the caret, this is very weird.
How can I make the caret visible?
I tried with styles but it didn't work.
This is my code so far:

from tkinter import *
from tkinter import ttk

root = root = Tk()
root.rowconfigure(0, weight=1)
root.columnconfigure(0, weight=1)

style = ttk.Style()
style.configure('My.TEntry', padding=10)
entry = ttk.Entry(root, style='My.TEntry')
entry['justify'] = 'right'
entry.grid(column=0, row=0, sticky='nswe', padx=5, pady=5)

root.mainloop()

Can someone help?

EDIT:
1.) I'm using Python 3.6.8 on Ubuntu 18.04
2.) It's not a matter of focus. I can't see the caret even if the widget has focus.

Answer 1

Maybe this could help you, simply do entry.focus():

from tkinter import *
from tkinter import ttk

root = root = Tk()
root.rowconfigure(0, weight=1)
root.columnconfigure(0, weight=1)

style = ttk.Style()
style.configure('My.TEntry', padding=10)
entry = ttk.Entry(root, style='My.TEntry')
entry['justify'] = 'right'
entry.grid(column=0, row=0, sticky='nswe', padx=5, pady=5)
entry.focus()

root.mainloop()