day02
1.for i in range() --->用于设置for循环的迭代设置。
ranage 也是一个前闭后开的。
2.random.randrange() --->随机产生给予范围之内的随机数字
random.randrange(1000,9999)
day03
1.python的缺点 精度丢失
1.例题
#密码包含大小写和数字
username = input('请输入用户名:')
password = input('请输入密码:')
A ='qwertyuiopasdfghjklzxcvbnm'
B ='QWERTYUIOPASDFGHJKLZXCVBNM'
C ='1234567890'
count1,count2,count3 = False,False,False
for i in password:
if i in A :
count1 = True
if i in B :
count2 = True
if i in C :
count3 = True
if count1 and count2 and count3 :
print('注册成功')
else :
print('密码必须含有大写，小写和数字')
2.例2
#输入两个数字进行加减乘除
num1,num2 = map(float,input('请输入Num1和Num2:').split(','))
choose_method = input('Choose Method:[+,-,*,/]')
if choose_method in '+-*/':
if choose_method == '+':
print('%.2f + %.2f = %.2f'%(num1,num2,num1+num2))
elif choose_method == '-':
print('%.2f - %.2f = %.2f'%(num1,num2,num1-num2))
elif choose_method == '*':
print('%.2f * %.2f = %.2f'%(num1,num2,num1*num2))
elif choose_method == '/':
print('%.2f / %.2f = %.2f'%(num1,num2,num1/num2))
else:
#抛出错误
raise KeyError('Only choose [+,-,*,/]')
3.例3
#三次输入错误密码锁死
passs = 123456
for i in range(3):
password = int(input('请输入密码：'))
if password == passs :
print('登录成功')
break
else:
print('请重试')
else:
print('您已三次输入密码错误，锁死')
4.例4
#随机生成四位数字验证码
import random
yanzhengma = random.randrange(1000,9999)
print(yanzhengma)
5.例5
#简易购物车
def Check_Goods(g):
G = ['汽车','火车','飞机']
if g in G:
Address()
else:
return False
def Check_Information(name,phone,addr):
is_Ok = True
if name == "" or name == "":
is_Ok = False
if len(phone) != 11 :
is_Ok = False
if addr not in ['北京','山东']:
is_Ok = False
return is_Ok
def Address():
name = input('请输入姓名：')
phone = input('请输入电话：')
addr = input('请输入地址：')
res = Check_Information(name,phone,addr)
if res:
Note()
return False
def Note():
print('马上发货')
def Start():
print('欢迎光临')
g = input('商品:')
Check_Goods(g)
Start()
6.例6
#注册用户
def Users():
users_ = input('请输入用户名：')
Z = '123456789'
N = 'QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm'
T = '~!@#$%^&*()'
is_Z = False
is_N = False
is_T = True
for i in users_:
#先检测字母
if i in Z :
is_Z = True
#检测数字
if i in N :
is_N = True
if i in T:
is_T = False
if is_Z and is_N and is_T:
password()
else:
print('密码必须由数字和字母组成,且不能有特殊字符')
def password():
passwd = input('请输入密码：')
if len(passwd) >= 6:
phone()
else:
print('密码必须大于6位，请重试')
def phone():
import re
compile = re.compile('str')
compile.search
compile.findall
pho = input('请输入手机号：')
if len(pho) == 11:
verify()
else:
print('手机号输入错误，请重试')
global_count = 0
def verify():
#声明变量是全局的
global global_count
import random
import time
yanzhengma = random.randrange(1000,9999)
global_count +=1
start_time = time.time()
print('向您手机发送的验证码为: %d'%yanzhengma)
veri = int(input('请输入验证码：'))
end_time = time.time()
sub_time = end_time - start_time
if sub_time > 2:
if global_count>2:
print('请稍后重试。')
exit()
print('验证码超时，即将重新发送')
time.sleep(2)
verify()
else:
if yanzhengma == veri:
print('注册成功')
else:
print('验证码错误，请重试')
time.sleep(2)
verify()
def Start():
print('请注册：')
Users()
Start()
