os模块练习
import os
# print(os.getcwd())
# os.chdir('E:\\')
# print(os.getcwd())
# print(os.listdir())
# print(os.listdir('F:\\'))
# os.mkdir('test')
# os.makedirs(r'.\a\b\c')#在当前目录下创建多层目录
# os.makedirs(r'F:\a\b\c')#在F盘下创建多层目录
# os.chdir('a')
# print(os.listdir())
# os.chdir(r'a\b\c')
# print(os.listdir())
# os.remove('test.txt')
# os.rmdir('c')
# print(os.getcwd())
# os.chdir(r'f:\course')
# print(os.getcwd())
# os.rmdir('test')
# os.removedirs(r'a\b\c')
# os.system('calc')
# os.system('mspaint')
# for i in os.walk(r'F:\course\test'):
# print(i)
# print(os.getcwd())
# print(os.path.dirname(r'F:\course\test\b\b.txt'))
# print(os.path.basename(r'F:\course\test\b\b.txt'))
#
# print(os.path.split(r'F:\course\test\b\b.txt'))
# print(os.path.splitext(r'F:\course\test\b\b.txt'))
#
# print(os.path.getsize(r'F:\course\test\b\b.txt'))
#
# import time
# temp = time.localtime(os.path.getatime(r'F:\course\test\b\b.txt'))
# print(temp)
#
# import pickle
# my_list = [123,3.14,'小甲鱼',['I love python','abc']]
# p_file = open('f:\\a.pkl','wb')
# pickle.dump(my_list,p_file)
# p_file.close()
#
# o_p_file = open('f:\\a.pkl','rb')
# t = pickle.load(o_p_file)
# print(t)
# f_name = input('请输入一个文件名：')
# f = open(f_name,'r')
# print('文件内容是：')
#
# for e in f:
# print(e)
#
# 语法结构
# try:
# 检测范围
# except exception[as reason]:
# 出现异常（exception）后的处理代码
# f = open('我为什么是一个文档.txt')
# print(f.read())
# f.close()
# try:
# f = open('我为什么是一个文档.txt')
# print(f.read())
# f.close()
# except OSError as reason:
# print('文件打开过程中出错了\n错误的原因是：' + str(reason))
#
# try:
# f = open('我是一个不存在文档.txt')
# print(f.read())
# f.close()
# sum = 1 + '1'
# except OSError as reason:
# print('文件打开过程中出错了\n错误的原因是：' + str(reason))
# except TypeError as reason:
# print('类型出错了\n错误的原因是：' + str(reason))
# try:
# # int('abc')
# # sum = 1 + '1'
# f = open('我是一个不存在文档.txt')
# print(f.read())
# f.close()
# except (ValueError,TypeError,OSError) as reason:
# print('出错了\n错误的原因是：' + str(reason))
# try:
# s = 1 + '1'
# int("abc")
# f = open('test111.txt')
# print(f.read())
# f.close()
# except (OSError, TypeError, ValueError) as error:
# print('出错了！\n原因是：' + str(error))
# try:
# f = open('kk.txt')
# print(f.read())
# sum = 1 + "1"
# f.close()
# except:
# print('出错了')
# try:
# f = open('kk.txt')
# print(f.read())
# sum = 1 + "1"
# except:
# print('出错了')
# finally:
# f.close()
# raise ZeroDivisionError
# raise ZeroDivisionError('除数不能为零')
def showMaxFac(num):
count = num
while count > 1:
if num % count == 0:
print('%d最大的约数是%d'% (num,count))
break
count -= 1
else:
print('%d是素数'% num)
num = int(input('请输入一个数：'))
showMaxFac(num)
魔法方法练习
# print(type(len))
# print(type(int))
#
# class C:
# pass
# print(type(C))
#
# c = C()
# a = int('123')
# # print(a)
# b = int('123')
# print(a + b)
#
# class N_int(int):
# def __add__(self, other):
# return int.__sub__(self,other)
# def __sub__(self, other):
# return int.__add__(self,other)
# a = N_int(3)
# b = N_int(4)
#
# print(a+b)#-1
# print(a-b)
# class T_int(int):
# def __add__(self, other):
# return int(self) + int(other)
# def __sub__(self, other):
# return int(self) - int(other)
# a = T_int(4)
# b = T_int(5)
# print(a + b)
# class Nint(int):
#
# def __radd__(self, other):
# return int.__sub__(self,other)
#
#
# a = Nint(3)
# b = Nint(5)
#
# print(a+b)
# print(1 + b)
# import time as t
# class MyTimer:
# def __init__(self):
# self.prompt = "未开始计时！"
# self.lasted = []
# self.start = 0
# self.stop = 0
#
# def __init__(self):
# self.unit = ['年', '月', '天', '小时', '分钟', '秒']
# self.prompt = "未开始计时！"
# self.lasted = []
# self.begin = 0
# self.end = 0
#
# # 开始计时
# def start(self):
# self.begin = t.localtime()
# self.prompt = "提示：请先调用 stop() 开始计时！"
# print("计时开始...")
#
# # 停止计时
# def stop(self):
# if not self.begin:
# print("提示：请先调用 start() 开始计时！")
# else:
# self.end = t.localtime()
# self._calc()
# print("计时结束！")
#
# # 计算运行时间
# def _calc(self):
# self.lasted = []
# self.prompt = "总共运行了"
# for index in range(6):
# self.lasted.append(self.end[index] - self.begin[index])
# if self.lasted[index]:
# self.prompt += (str(self.lasted[index]) + self.unit[index])
# # 为下一轮计算初始化变量
# self.begin = 0
# self.end = 0
#
# # 重写add方法
# def __add__(self, other):
# prompt = "总共运行了"
# result = []
# for index in range(6):
# result.append(self.lasted[index] + other.lasted[index])
# if result[index]:
# prompt += (str(result[index]) + self.unit[index])
# return prompt
#
# def __str__(self):
# return self.prompt
#
# __repr__ = __str__
#
# t1 = MyTimer()
# print(t1)
# t1.start()
# t1.stop()
# print(t1)
# class C:
# def __init__(self):
# self.x = 'x-man'
# c = C()
# print(c.x)
# print(getattr(c,'x','没有该属性'))
# print(getattr(c,'y','没有该属性'))
#
# setattr(c,'y','s-man')
# print(getattr(c,'y'))
#
# print(c.__dict__)
# class C:
# def __init__(self,size = 10):
# self.size = size
#
# def getSize(self):
# return self.size
# def setSize(self,value):
# self.size = value
# def delSize(self):
# del self.size
#
# x = property(getSize,setSize,delSize)
# c = C()
# print(c.x)
#
# c.x = 15
# print(c.x)
# c.setSize(20)
# print(c.getSize())
# class C:
# def __getattribute__(self, name):
# print('getattribute')
# return super().__getattribute__(name)
#
# def __setattr__(self, name, value):
# print('setattr')
# super().__setattr__(name,value)
#
# def __delattr__(self, name):
# print('delattr')
# super().__delattr__(self,name)
#
# def __getattr__(self, name):
# print('getattr')
#
# c = C()
# print(c.x)
# c.x = 1
# print(c.x)
class Rect:
def __init__(self,w = 0,h = 0):
self.w = w
self.h = h
def __setattr__(self, name, value):
if name == 'square':
self.w = value
self.h = value
else:
# super().__setattr__(name,value)
self.__dict__[name] = value
# self.name = value
def getA(self):
return self.w * self.h
r1 = Rect(3,4)
print(r1.getA())