这确实是一种奇怪的行为，因为在我这方面效果很好：
try: import tkinter as tk import tkinter.ttk as ttkexcept importError: import Tkinter as tk import ttkimport randomimport stringdef insert_something_to_combobox(box): box['values'] = [gen_key() for _ in range(10)]def gen_key(size=6, chars=string.ascii_uppercase + string.digits): # just to generate some random stuff return ''.join(random.choice(chars) for _ in range(size))root = tk.Tk()text_font = ('Courier New', '10')main_frame = tk.frame(root, bg='gray') # main framecombo_box = ttk.Combobox(main_frame, font=text_font) # apply font to comboboxentry_box = ttk.Entry(main_frame, font=text_font) # apply font to entryroot.option_add('*TCombobox*Listbox.font', text_font) # apply font to combobox listcombo_box.pack()entry_box.pack()main_frame.pack()insert_something_to_combobox(combo_box)root.mainloop()也可以为特定的组合框指定字体，因为我们可以依靠ttk :: combobox ::
PopdownWindow函数：
...class CustomBox(ttk.Combobox): def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self.bind('<Map>', self._handle_popdown_font) def _handle_popdown_font(self, *args): popdown = self.tk.eval('ttk::combobox::PopdownWindow %s' % self) self.tk.call('%s.f.l' % popdown, 'configure', '-font', self['font'])...root = tk.Tk()text_font = ('Courier New', '10')main_frame = tk.frame(root, bg='gray') # main framecombo_box = CustomBox(main_frame, font=text_font) # apply font to comboboxentry_box = ttk.Entry(main_frame, font=text_font) # apply font to entry...root.mainloop()但是，这
CustomBox缺乏功能，因为一旦组合框窗口小部件映射后就配置了popdown的字体，因此，字体的任何后续配置都不会为popdown配置此选项。
让我们尝试覆盖默认配置方法：
class CustomBox(ttk.Combobox): def __init__(self, *args, **kwargs): # initialisation of the combobox entry super().__init__(*args, **kwargs) # "initialisation" of the combobox popdown self._handle_popdown_font() def _handle_popdown_font(self): """ Handle popdown font Note: https://github.com/nomad-software/tcltk/blob/master/dist/library/ttk/combobox.tcl#L270 """ # grab (create a new one or get existing) popdown popdown = self.tk.eval('ttk::combobox::PopdownWindow %s' % self) # configure popdown font self.tk.call('%s.f.l' % popdown, 'configure', '-font', self['font']) def configure(self, cnf=None, **kw): """Configure resources of a widget. Overridden! The values for resources are specified as keyword arguments. To get an overview about the allowed keyword arguments call the method keys. """ # default configure behavior self._configure('configure', cnf, kw) # if font was configured - configure font for popdown as well if 'font' in kw or 'font' in cnf: self._handle_popdown_font() # keep overridden shortcut config = configure此类将产生一个响应更快的组合框实例。
