如何使Tk Notebook Tab标题的字体为粗体

Question

我从这里获得了一个可以更改ttk Notebook tabheader单词颜色的脚本，请看下面，我的问题是，基于此脚本，如何使tabheader中的“ Ocam＆TstCon”一词变为粗体？

white = "gray20"
gray = "gray85"

style = ttk.Style()
style.theme_create( "yummy", parent="alt", settings=
{"TNotebook.Tab":
    {"configure": 
      {"background": white
      },
    "map":        
      {"background": [("selected", gray)]
      } 
    } 
} 
)

style.theme_use("yummy")

rows = 0
while rows < 30:
window.rowconfigure(rows, weight=1)
window.columnconfigure(rows, weight=1)
rows += 1

nb = ttk.Notebook(window)
nb.grid(row=0, column=0, columnspan=50, rowspan=70, sticky='NESW')

# Adds tab 1 for Ocam & TstCon
page1 = ttk.Frame(nb)
nb.add(page1, text='Ocam & TstCon' )