Python基本练习题

1、打印1-100的数

for i in range(1, 101):
    print(i)

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2、打印1+2+..100的总和

num = 1
sum = 0
while num < 101:
    sum += num
    num += 1
print(sum)

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3、使用while输出1 2 3 4 6

i = 1
while i < 7:
    if i == 5:
        print('')
    else:
        print(i)
    i += 1

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4、输出1-100内所有奇数

for i in range(1, 101):
    if i % 2 != 0:
        print(i)

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5、用户验证登录

username = 'liangxiao'
password = '123..com'
username_in = input('请输出您的名字：')
password_in = input('请输出您的密码：')
num = 1
while num < 4:
    num += 1
    if username_in == username and password_in == password:
        print('登录成功！欢迎您的回归！')
        break
    else:
        print('账号密码不匹配，请确认后重新输入！')
        num = 4 - num
        num = '您当前还剩余输入次数机会%d' % (num)
        print(num)
        username_in = input('请输出您的名字：')
        password_in = input('请输出您的密码：')

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6、格式化输出

name = input('请输出你的名字：')
age = input('请输出你的年龄：')

information = '''
你的个人信息如下：
你的名字：%s
你的年龄：%s
''' % (name, age)

print(information)

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7、python的基础运算

6 or 2 > 1 =  6 
3 or 2 > 1 =  3
0 or 5 < 4 =  false
5 < 4 or 3 = 3
2 > 1 or 6 = true
3 and 2 > 1 = true
0 and 3 > 1 = false
2 > 1 and 3 = 3
3 > 1 and 0 = 0
1 > 2 or 4 < 7 and 8 == 8
3 > 1 and 2 or 2 < 3 and 3 and 4 or 3 > 2 = 2
not 2 > 1 and 3 < 4 or 4 > 5 and 2 > 1 and 9 > 8 or 7 < 6 = false

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8、计算 1 - 2 + 3 - 4 ... + 99

num = 0
sum = 0
while num < 100:
    num += 1
    if num == 88:
        continue
    elif num % 2 != 0:
        sum += num
    else:
        sum -= num
print(sum)

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9、设置用户输入内容检测

input1 = input('请输出您需要注册的密码：')
sensitive_words = ['小粉锤', '大铁锤']
i = 0
while i < 3:
    if input1 in sensitive_words:
        print('您输出的内容有误，请重新输入!')
        input1 = input('请输出您需要注册的密码：')
    else:
        print('输出正确，登录成功！')
        print('欢迎您的回归！')
        break
    i += 1

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10、验证码简单验证

code = 'ac8e'
code_input = input('请输出验证码：')
if code_input.upper() == code:
    print('验证通过')
else:
    print('验证失败')

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11、实现一个列表用户添加

li = []
username = input('>>>请输出您需要添加的用户：')
while true:
    if username.upper() != 'q':
        li.append(username)
        print('添加成功')
        operation = input('是否继续？（y/n）')
        if operation.upper() == 'y':
            username = input('>>>请输出您需要添加的用户：')
        elif operation.upper() == 'n':
            print('welcome to use this program!')
            break
        else:
            print('您的输入有误！')
            username = input('>>>请输出您需要添加的用户：')
    else:
        print('welcome to use this program!')
        break

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12、 列表[11 ,22...99];大于66的加入到key2中，小于66的放入到key1中

list1 = [11, 22, 33, 44, 55, 66, 77, 88, 99]
dict1 = {'key1':'', 'key2':''}
list2 = []
list3 = []
for i in list1:
    if i > 66:
        list2.append(i)
    else:
        list3.append(i)
dict1['key2'] = list2
dict1['key1'] = list3
print(dict1)

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13、输出商品列表，用户输入序号，显示用户选中的商品

商品 list1 = ["手机", "电脑", '鼠标垫', '游艇']，要求如下：
1：页面显示 序号 + 商品名称，如：
     1 手机
     2 电脑
     3 鼠标垫
     4 游艇
2： 用户输入选择的商品序号，然后打印商品名称
3：如果用户输入的商品序号有误，则提示输入有误，并重新输入。
4：用户输入q或者q，退出程序。"""

list1 = ['手机', '电脑', '鼠标垫', '游艇']
for i in list1:
    print('{}\t{}'.format(list1.index(i)+1,i))
while 1:
    choose = input('请输出您的选择：(1-4)')
    if choose.isdigit():
        if int(choose) > 0 and int(choose) < 5:
            print('输入正确！')
            print(list1[int(choose)-1])
            break
        else:
            print('您输入的序列有误，请重新输入！')
            continue
    elif choose.isalpha():
        if choose.upper() == 'q':
            print('good-bye!')
            break
        else:
            print('退出失败，您的输出有误')
            continue
    else:
        print('您的输入有误，请重新输入！')

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14、账号注册登录验证

while 1:
    username = input('请输出您需要注册的账号：')
    password = input('请输出您需要注册的密码：')
    if username.isalnum() and password.isalnum():
        print('可以注册√')
        username_new = input('请再次确认您需要注册的账号：')
        password_new = input('请再次确认您需要注册的密码：')
        if username_new == username and password_new == password:
            print('注册成功！')
            break
    else:
        input('注册信息有误，请重新输入\n')

username_file = open('username', mode='a', encoding='utf-8')
password_file = open('password', mode='a', encoding='utf-8')

username_file.write(username)
password_file.write(password)
username_file.close()
password_file.close()

for i in range(3):
    login_username = input('请登录用户名：')
    login_password = input('请登录密码：')
    username = open('username', mode='r', encoding='utf-8')
    password = open('password', mode='r', encoding='utf-8')
    read_user = username.read()
    read_pass = password.read()
    if login_username == read_user and login_password == read_pass:
        print('登录成功！')
        break
    else:
        ii = i + 1
        num = 3 - ii
        print('登录失败，请重新登录！您还剩余{}次数'.format(num))
else:
    print('账号已锁定！')

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