偏函数GUI程序

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环境：Ubuntu/Python2.7

主要目的：使用偏函数模块化功能简化代码

实例：一个路标显示程序

#!/usr/bin/env python

from functools import partial as pto
from Tkinter import Tk,Button,X
from tkMessageBox import showinfo,showwarning,showerror

WARN = 'warn'
CRIT = 'crit'
REGU = 'regu'

SIGNS = {'do not enter':CRIT,

'railroad crossing':WARN,

'55\nspeed limit':REGU,
'wrong way':CRIT,
'merging traffic':WARN,
'one way':REGU}

critCB = lambda: showerror('Error','Error Button Pressed!')
warnCB = lambda: showwarning('Warning','Warning Button Pressed!')
infoCB = lambda: showinfo('Info','Info Button Pressed!')

top = Tk()
top.geometry('300x250')
top.title('Road Signs')
Button(top,text='QUIT',command=top.quit,bg='red',fg='white').pack()

MyButton = pto(Button,top)
CritButton  = pto(MyButton,command=critCB,bg='yellow',fg='red')
WarnButton = pto(MyButton,command=warnCB,bg='goldenrod1')
ReguButton = pto(MyButton,command=infoCB,bg='white')

for eachSign in SIGNS:
        signType = SIGNS[eachSign]
        cmd = '%sButton(text=%r%s).pack(fill=X,expand=True)'%(signType.title(),eachSign,'.upper()'if signType==CRIT else '.title()')
        eval(cmd)

top.mainloop()