Python编程示例

#coding:utf-8
class Car:
def __init__(self,speed=0):
self.speed = speed
return
def start(self,speed=10):
self.speed = speed
print "started car, whose speed is %d"%self.speed
return
def stop(self):
self.speed = 0
print "stopped car"
return
def speedup(self,delta=1):
self.speed += delta
print "increased speed, which is current %d"%self.speed
return
def slowdown(self,delta=1):
self.speed -= delta
if self.speed < 0 :
self.speed = 0
print "decreased speed, which is current %d"%self.speed
return

import Tkinter
root = https://www.360docs.net/doc/5011472183.html,()
root.geometry("400x500")
label = https://www.360docs.net/doc/5011472183.html,bel(root,text="start")
label.pack(fill=Y)
root.mainloop()