#!/usr/bin/python
# Authoer: Spencer.Luo
# Date: 12/7/2017
# Version 1.0
#=======================================================================================================================
class Customer:
"""客户"""
def __init__(self, name):
self.__name = name
self.__num = 0
self.__clinics = None
def getName(self):
return self.__name
def register(self, system):
system.pushCustomer(self)
def setNum(self, num):
self.__num = num
def getNum(self):
return self.__num
def setClinic(self, clinic):
self.__clinics = clinic
def getClinic(self):
return self.__clinics
class NumeralIterator:
"""迭代器"""
def __init__(self, data):
self.__data = data
self.__curIdx = -1
def next(self):
"""移动至下一个元素"""
if (self.__curIdx < len(self.__data) - 1):
self.__curIdx += 1
return True
else:
return False
def current(self):
"""获取当前的元素"""
return self.__data[self.__curIdx] if (self.__curIdx < len(self.__data) and self.__curIdx >= 0) else None
class NumeralSystem:
"""排号系统"""
__clinics = ("1号分诊室", "2号分诊室", "3号分诊室")
def __init__(self, name):
self.__customers = []
self.__curNum = 0
self.__name = name
def pushCustomer(self, customer):
customer.setNum(self.__curNum + 1)
click = NumeralSystem.__clinics[self.__curNum % len(NumeralSystem.__clinics)]
customer.setClinic(click)
self.__curNum += 1
self.__customers.append(customer)
print("%s 您好！您已在%s成功挂号，序号：%04d，请耐心等待！"
% (customer.getName(), self.__name, customer.getNum()) )
def getIterator(self):
return NumeralIterator(self.__customers)
def visit(self):
for customer in self.__customers:
print("下一位病人 %04d(%s) 请到 %s 就诊。"
% (customer.getNum(), customer.getName(), customer.getClinic()) )
# Version 2.0
#=======================================================================================================================
# 代码框架
#==============================
class BaseIterator:
"""迭代器"""
def __init__(self, data):
self.__data = data
self.toBegin()
def toBegin(self):
"""将指针移至起始位置"""
self.__curIdx = -1
def toEnd(self):
"""将指针移至结尾位置"""
self.__curIdx = len(self.__data)
def next(self):
"""移动至下一个元素"""
if (self.__curIdx < len(self.__data) - 1):
self.__curIdx += 1
return True
else:
return False
def previous(self):
"移动至上一个元素"
if (self.__curIdx > 0):
self.__curIdx -= 1
return True
else:
return False
def current(self):
"""获取当前的元素"""
return self.__data[self.__curIdx] if (self.__curIdx < len(self.__data) and self.__curIdx >= 0) else None
# 基于框架的实现
#==============================
# Test
#=======================================================================================================================
def testHospital():
numeralSystem = NumeralSystem("挂号台")
lily = Customer("Lily")
lily.register(numeralSystem);
pony = Customer("Pony")
pony.register(numeralSystem)
nick = Customer("Nick")
nick.register(numeralSystem)
tony = Customer("Tony")
tony.register(numeralSystem)
print()
iterator = numeralSystem.getIterator()
while(iterator.next()):
customer = iterator.current()
print("下一位病人 %04d(%s) 请到 %s 就诊。"
% (customer.getNum(), customer.getName(), customer.getClinic()) )
# numeralSystem.visit()
def testBaseIterator():
print("从前往后遍历:")
iterator = BaseIterator(range(0, 10))
while(iterator.next()):
customer = iterator.current()
print(customer, end="\t")
print()
print("从后往前遍历:")
iterator.toEnd()
while (iterator.previous()):
customer = iterator.current()
print(customer, end="\t")
def testLoop():
arr = [0, 1, 2, 3, 4, 5, 6, 7 ,8 , 9];
for e in arr:
print(e, end="\t")
# 方法一：使用()定义生成器
gen = (x * x for x in range(10))
# 方法二：使用yield定义generator函数
def fibonacci(maxNum):
"""斐波那契数列的生成器"""
a = b = 1
for i in range(maxNum):
yield a
a, b = b, a + b
def testIterable():
print("方法一，0-9的平方数：")
for e in gen:
print(e, end="\t")
print()
print("方法二，斐波那契数列：")
fib = fibonacci(10)
for n in fib:
print(n, end="\t")
print()
print("内置容器的for循环：")
arr = [x * x for x in range(10)]
for e in arr:
print(e, end="\t")
print()
print()
print(type(gen))
print(type(fib))
print(type(arr))
from collections import Iterable, Iterator
# 引入Iterable和Iterator
def testIsIterator():
print("是否为Iterable对象：")
print(isinstance([], Iterable))
print(isinstance({}, Iterable))
print(isinstance((1, 2, 3), Iterable))
print(isinstance(set([1, 2, 3]), Iterable))
print(isinstance("string", Iterable))
print(isinstance(gen, Iterable))
print(isinstance(fibonacci(10), Iterable))
print("是否为Iterator对象：")
print(isinstance([], Iterator))
print(isinstance({}, Iterator))
print(isinstance((1, 2, 3), Iterator))
print(isinstance(set([1, 2, 3]), Iterator))
print(isinstance("string", Iterator))
print(isinstance(gen, Iterator))
print(isinstance(fibonacci(10), Iterator))
def testNextItem():
print("将Iterable对象转成Iterator对象：")
l = [1, 2, 3]
itrL = iter(l)
print(next(itrL))
print(next(itrL))
print(next(itrL))
print("next()函数遍历迭代器元素：")
fib = fibonacci(4)
print(next(fib))
print(next(fib))
print(next(fib))
print(next(fib))
# print(next(fib))
class NumberSequence:
"""生成一个间隔为step的数字系列"""
def __init__(self, init, step, max = 100):
self.__data = init
self.__step = step
self.__max = max
def __iter__(self):
return self
def __next__(self):
if(self.__data < self.__max):
tmp = self.__data
self.__data += self.__step
return tmp
else:
raise StopIteration
def testNumberSequence():
numSeq = NumberSequence(0, 5, 20)
print(isinstance(numSeq, Iterable))
print(isinstance(numSeq, Iterator))
for n in numSeq:
print(n, end="\t")
# testHospital()
# testBaseIterator()
# testLoop()
# testIterable()
testIsIterator()
# testNextItem()
# testNumberSequence()
