1.验证三次用户登录
#!/usr/bin/python env # coding:utf-8
# 验证三次用户登录
count = 0
while count < 3:
username = input("输入账号：")
pwd = input("输入密码：")
if username == "zq" and pwd == "zq":
print("登录成功")
break
else:
print("账号或者密码错误")
count += 1
print("退出系统！！！！")
2.随机生成四位数
# 随机生成4位数
import random
def ident_code(num=4):
res = ""
for i in range(num):
# 数字0-9
num1 = str(random.randint(0, 9))
# 大写字母A-Z
# a = chr(random.randint(65, 90))
# 小写字母a-z
b = chr(random.randint(97, 122))
res += random.choice([num1, b])
return res
print(ident_code())
3.99乘法表
# 99乘法表 for i in range(1, 10): string = "" for j in range(1, i + 1): string += str(j) + " * " + str(i) + " = " + str(i * j) + "\t" print(string)
4.文件操作
# 文件操作去取文件中空行 并将zhang改为zzzzzzzzzz with open('data_txt.py', encoding="utf-8") as f: with open('temp.py', 'w', encoding="utf-8") as f1: # 要改数据的行号 res_line = [] # 保存除去空行后的数据 del_n_data = [] data = f.readlines() for i in data: if len(i) > 1: del_n_data.append(i) for k,v in enumerate(del_n_data): if v.startswith("zhang") and len(v) == 6: res_line.append(k) for i in res_line: del_n_data[i] = "zzzzzzzzzzzzzzz\n" print(del_n_data) f1.writelines(del_n_data)
5.读取文件的最后一行
# 读取文件最后一行 循环文件的推荐方式 with open('20190225.log', 'rb') as f: for i in f: offs = -10 while True: f.seek(offs, 2) data = f.readlines() #最后一行数据+上面数据 用列表索引-1，可取到最后一行数据 if len(data) > 1: print(data[-1].decode("utf-8")) break #data长度小于1，表示未读到大于一行的数据 添加offs偏移量 offs *= 2
6.斐波那契数列
# 斐波那契数列 class Fib: def __init__(self, num): self._x = 1 self._y = 1 self.num = num def __iter__(self): return self def __next__(self): self._x, self._y = self._y, self._x + self._y if self._x > self.num: raise StopIteration("结束") return self._x def show_fib(self): l = [] for i in self: l.append(i) return l #求1000内的数 f1 = Fib(10000) print(f1.show_fib())
7.生成器 统计每个省份的年龄
# 生成器 统计每个省份的年龄 ''' b.txt {'name': '北京', 'age': 20} {'name': '上海', 'age': 33} {'name': '广州', 'age': 28} {'name': '深圳', 'age': 40} ''' def get_age(): with open('b.txt',encoding='utf-8') as f: for i in f: yield i g = get_age() all_age = sum(int(eval(i)['age']) for i in g) g = get_age() def show_age(): for i in g: print('省份:%s 人口平均年龄:%.2f%%' %(eval(i)['name'],100*eval(i)['age']/all_age)) show_age()
8.装饰器验证用户账号登录
# 简单账号密码验证 # 账号 密码 user_list = [ {'username': 'zxq', 'passwd': 'zxq'}, {'username': 'zq', 'passwd': 'zq'}, ] # 用户状态 current_status = {'username': None, 'login': False} def check_passwd(func): def wrapper(*args, **kwargs): if current_status['username'] and current_status['login']: res = func(*args, **kwargs) return current_status['username'] username = input('username:'.strip()) passwd = input('password:'.strip()) for user_dict in user_list: if username == user_dict['username'] and passwd == user_dict['passwd']: current_status['username'] = username current_status['login'] = True res = func(*args, **kwargs) return current_status['username'] else: print('用户名或者密码错误') return wrapper def index(): print('hi, guest ,welcome to my index') return "ok_index" @check_passwd def home(): print('hi, %s ,welcome home' % (current_status['username'])) return "ok_home" @check_passwd def shop(): print('hi, %s ,welcome shop' % (current_status['username'])) return 'ok_shop' index() home() shop()
9.函数闭包带参数装饰器 验证用户登录
# 基于文件账号密码验证 user_list = [ {'username': 'zxq', 'passwd': 'zxq'}, {'username': 'zq', 'passwd': 'zq'}, ] current_status = {'username': None, 'login': False} def auth(auth_type='filedb'): def check_passwd(func): def wrapper(*args, **kwargs): if auth_type == 'strdb': print('认证类型是:%s' % (auth_type)) if current_status['username'] and current_status['login']: res = func(*args, **kwargs) return 'ok' username = input('username:'.strip()) passwd = input('password:'.strip()) for user_dict in user_list: if username == user_dict['username'] and passwd == user_dict['passwd']: current_status['username'] = username current_status['login'] = True res = func(*args, **kwargs) return 'ok' else: print('用户名或者密码错误') elif auth_type == 'filedb': print('认证类型是:%s' % (auth_type)) else: print('认证类型是:%s' % ('未知')) return wrapper return check_passwd @auth(auth_type='strdb') def index(): print('hi, guest,welcome') @auth(auth_type='strdb') def home(): print('hi, %s,welcome home' % (current_status['username'])) return "ok" @auth(auth_type='strdb') def shop(): print('hi, %s,welcome shop' % (current_status['username'])) return 'ok' index() home() shop()
10.文件增删改查
#!/usr/bin/python env # coding:utf-8 import os def file_handler(backend_data,res=None,type='fetch'): if type == 'fetch': with open('haproxy.conf','r') as read_f: tag=False ret=[] for read_line in read_f: if read_line.strip() == backend_data: tag=True continue if tag and read_line.startswith('backend'): # tag=False break if tag: print('\033[1;45m%s\033[0m' %read_line,end='') ret.append(read_line) return ret elif type == 'change': with open('haproxy.conf', 'r') as read_f, \ open('haproxy.conf_new', 'w') as write_f: tag = False has_write = False for read_line in read_f: # server if read_line.strip() == backend_data: tag = True continue if tag and read_line.startswith('backend'): tag = False if not tag: write_f.write(read_line) else: if not has_write: for record in res: write_f.write(record) has_write = True os.rename('haproxy.conf', 'haproxy.conf.bak') os.rename('haproxy.conf_new', 'haproxy.conf') os.remove('haproxy.conf.bak') def fetch(data): # print('\033[1;43m这是查询功能\033[0m') # print('\033[1;43m用户数据是\033[0m',data) backend_data='backend %s' %data return file_handler(backend_data) def add(): pass def change(data): # print('这是修改功能') # print('用户输入的数据是',data) backend=data[0]['backend'] #文件当中的一条记录 www.oldboy1.org backend_data='backend %s' %backend #backend www.oldboy1.org # server 2.2.2.4 2.2.2.4 weight 20 maxconn 3000 old_server_record='%sserver %s %s weight %s maxconn %s\n' %(' '*8,data[0]['record']['server'], data[0]['record']['server'], data[0]['record']['weight'], data[0]['record']['maxconn']) new_server_record = '%sserver %s %s weight %s maxconn %s\n' % (' ' * 8, data[1]['record']['server'], data[1]['record']['server'], data[1]['record']['weight'], data[1]['record']['maxconn']) print('用户想要修改的记录是',old_server_record) res=fetch(backend) #fetch('www.oldboy1.org') print('来自change函数--》',res) if not res or old_server_record not in res: return '你要修改的记录不存在' else: index=res.index(old_server_record) res[index]=new_server_record res.insert(0,'%s\n' %backend_data) file_handler(backend_data,res=res,type='change') def delete(): pass if __name__ == '__main__': msg=''' 1:查询 2:添加 3:修改 4:删除 5:退出 ''' msg_dic={ '1':fetch, '2':add, '3':change, '4':delete, } while True: print(msg) choice=input('请输入你的选项：').strip() if not choice:continue if choice == '5':break data=input('请输入你的数据：').strip() if choice != '1': data=eval(data) res=msg_dic[choice](data) print('最终结果是--》',res)
11.购物车
#购物车 product_list = [ ('Mac',9000), ('kindle',800), ('tesla',900000), ('bike',2000), ] shopping_car = [] money = raw_input('Please input your money:') if money.isdigit(): money=int(money) print(u' 商品清单 ') check_status = 'True' while check_status: for k,v in enumerate(product_list,1): print(u'商品编号:' + str(k) + u',商品名称:' + v[0] + u',商品价格:' + str(v[1])) choice=raw_input(u'选择购买商品编号[退出,请按：q]：'.encode('gbk')) #判断整数 if choice.isdigit(): #输入正确 choice=int(choice) try: if choice > 0 and choice <= len(product_list) + 1 : #取出商品 p_item=product_list[choice - 1] #判断钱数,商品加入购物车,余额减除 if p_item[1] < money: money -= p_item[1] shopping_car.append(p_item) else: print(u'余额不足，还剩%s'%money) print(p_item) #输入不是整数 except: print(u'输入编号错误!!!!!!!!!!!!!!!') #退出 elif str(choice) == 'q': print(u'------------您已经购买如下商品----------------') #循环遍历购物车里的商品，购物车存放的是已买商品 for i in shopping_car: print(i) print(u'您还剩%s元钱'%money) break #非法输入 else: print('invalid input!!!!!!!!!!!!!!!') else: print('invalid input!!!!!!!!!!!!!!!')