tkinter font's in a seprate file-CodePudding

I have two python files, one is a config file with font information

Here is my config file:

from tkinter.font import Font

HEADER_FONT = Font(
  family="Futura",
  size=22,
  weight="bold",
)

Here are the lines I am having trouble within my main file:

import app.config.colors as colors
import app.config.fonts as fonts

root = tk.Tk()
headerFrame = tk.LabelFrame(root, bg=colors.WHITE, bd=0)
headerFrame.pack(side="top", fill="x")

headerLabel = tk.Label(headerFrame, text="job automator 2", fg=colors.PRIMARY, bg=colors.WHITE, font=fonts.HEADER_FONT).pack(padx=5, pady=10, anchor=W)

root.mainloop()

And finally, here is my error I wish to solve:

Traceback (most recent call last):
  File "c:\Users\Tommy's Gaming PC\Desktop\Python Projects\JobAutomator2\app.py", line 12, in <module>
    import app.config.fonts as fonts
  File "c:\Users\Tommy's Gaming PC\Desktop\Python Projects\JobAutomator2\app\config\fonts.py", line 11, in <module>
    HEADER_FONT = Font(
  File "C:\Users\Tommy's Gaming PC\AppData\Local\Programs\Python\Python39\lib\tkinter\font.py", line 72, in __init__
    root = tkinter._get_default_root('use font')
  File "C:\Users\Tommy's Gaming PC\AppData\Local\Programs\Python\Python39\lib\tkinter\__init__.py", line 297, in _get_default_root
    raise RuntimeError(f"Too early to {what}: no default root window")
RuntimeError: Too early to use font: no default root window

CodePudding user response：

This problem is probably because rendering a font requires an initialized window since on pretty much every library I've used, it requires OpenGL context. You probably have to create a window first like this

from tkinter import *
window=Tk()

window.title('Hello Python')
window.geometry("300x200 10 20")

# place your font here

window.mainloop()

You should move the imports to AFTER the window is created

CodePudding user response：

it's because you are defining fonts in seprate file having no root window. you can solve this error by editing your font carrying file as

# Your imports here
from tkinter import Tk
_root = Tk()

# rest of code here