pythonday4

#coding=utf-8
#函数定义其它形式:
def play( p1 , p2 = 20 ):
	print '正在玩耍 ~~~' , p1 , '----' , p2
	pass

#调用:
#play( p1 = 10  ) 

#异常处理: try:  except:  finally:
try:
	#模拟除法运算报错.
	#result = 10/0
	#print '结果为:',result
	
	#模拟支付报错: 余额不足
	money = 100
	if money >= 1000:
		print '支付成功'
	else:
		#手动抛出异常:
		e1 = MyException()
		raise e1
	
except Exception:
	print '报错啦:'
finally:
	print "必须执行的代码块!!!"

#自定义异常:
class MyException(Exception):
	
	def printMsg():
		print "余额不足"
		pass