Grid布局下左侧框架小于右侧的原因及等宽实现方案

你的问题出在Grid列的宽度分配逻辑上：虽然你给窗口的第0、1列都设置了weight=1，但当列内控件的内容宽度存在差异时，Grid会优先根据内容撑开列宽，导致左右框架宽度不等。

要让左右框架宽度严格一致，只需给这两列添加**uniform参数**，将它们归入同一个均匀分组，强制两列保持相同的宽度比例：

import customtkinter as ctk

class SettingsWindow(ctk.CTk):
    def __init__(self):
        super().__init__()

        self.title('Einstellungen')
        self.geometry('1000x750+10+10')
        self.grid_rowconfigure(0, weight=1)
        self.grid_rowconfigure(1, weight=1)
        # 关键修改：添加uniform参数，让两列属于同一分组
        self.grid_columnconfigure(0, weight=1, uniform="same_col")
        self.grid_columnconfigure(1, weight=1, uniform="same_col")

        self.frame_settings = ctk.CTkFrame(self, border_width=1, border_color='black')
        self.frame_settings.grid(row=0, column=0, sticky='nesw', padx=(5, 5), pady=(5, 5))
        self.frame_settings.grid_columnconfigure(0, weight=1)

        self.label_settings = ctk.CTkLabel(self.frame_settings, bg_color='lightgrey', text='Einstellungen')
        self.label_settings.grid(row=0, column=0, columnspan=2, padx=(5, 5), pady=(5, 5))

        self.frame_database_settings = ctk.CTkFrame(self, border_width=1, border_color='black')
        self.frame_database_settings.grid(row=0, column=1, sticky='nesw', padx=(5, 5), pady=(5, 5))
        self.frame_database_settings.grid_columnconfigure(0, weight=1)

        self.label_database_settings = ctk.CTkLabel(self.frame_database_settings, bg_color='lightgrey',
                                                    text='Datenbank-Einstellungen')
        self.label_database_settings.grid(row=0, column=0, columnspan=2, padx=(5, 5), pady=(5, 5))

        self.frame_rules = ctk.CTkFrame(self, border_width=1, border_color='black')
        self.frame_rules.grid(row=1, column=0, columnspan=2, sticky='nesw', padx=(5, 5), pady=(5, 5))
        self.frame_rules.grid_columnconfigure(0, weight=1)

        self.label_rules = ctk.CTkLabel(self.frame_rules, text='Regeln')
        self.label_rules.grid(row=0, column=0, columnspan=2, pady=(5, 5))

SettingsWindow().mainloop()

原理说明 #

uniform参数接受一个字符串作为分组标识，所有带有相同标识的列（或行）会强制按照weight的比例分配空间，且各自的最小/最大尺寸会同步，彻底避免内容差异导致的宽度不一致问题。

内容的提问来源于stack exchange，提问作者Schnieker