Basic Python programming code exercises (3)

1. Guessing game

1. There is a sequence: 8 , 4 , 2 , 1 , 23 , 344 , 12
2. Loop out the values ​​of an array
3. Find the sum of all values ​​in a sequence
4. Guess the number game: input any data from the keyboard, and judge whether the number is included in the sequence

The implementation code is as follows:

list1 = [8, 4, 2, 1, 23, 344, 12]
sum = 0
for x in list1:
    print('数字的值:', x)
    sum += x
print('和:%d' % sum)
num = int(input('请输入你要查找的数字:'))
if list1.count(num) == 0:
    print('数字不存在!')
else:
    print('存在')

operation result:

 

2. Display the names of 5 special offers on the console

The implementation code is as follows:

list1 = ["Nike背包", "Adidas运动衫", "李宁运动鞋", "Kappa外套", "361腰包"]
print("本次特价活动商品有：")
for x in list1:
  print(x)

operation result:

 

3. Settlement of shopping amount

Output 5 shopping amounts and the total amount in the form of a table

1. Implementation steps
   1. Create a container (list, tuple or dictionary) of length 5 to store the shopping amount
   2. Circularly input 5 shopping amounts and add up the total amount
   3. Use the cycle to output 5 shopping amounts, and finally output the total amount

The implementation code is as follows:

list = {}
sum = 0
for i in range(5):
    pay_money = float(input("请输入第"+str(i+1)+"笔购物金额："))
    list[i+1] = pay_money
    sum = sum+pay_money

print("序号             金额（元）")
for k,v in list.items():
    print(k,"             ",v)
print("总金额          ",sum)

operation result: 

4. Circularly input the grades of 5 students, sort them in ascending order and output the results

Tip: sort() method: sort the array in ascending order

The implementation code is as follows:

arrScore =[]
i = 1
while i<= 5:
    s = float(input('请录入第%d个人的成绩:'%i))
    i += 1
    arrScore.append(s)

arrScore.sort()
print('学员成绩按升序排列：',arrScore)

operation result:

 

5. Character output in reverse order

1. Sort a random set of characters
2. Output in ascending and reverse order  

 The implementation code is as follows:

from random import shuffle
data=list(range(10))
shuffle(data)
print('原字符序列：',data)
print('升序排序后：',sorted(data))
print('逆序输出为：',list(reversed(sorted(data))))

operation result:

 

6. Insert characters into an ordered sequence

1. Improve on the previous exercise
2. A set of ordered character sequences a , b , c , e , f , p , u , z , insert a new character into this character sequence, and the character sequence is required to remain in order after insertion

 The implementation code is as follows:

import bisect

a = [1, 2, 4, 8, 12, 14, 19]
item = 13
position = bisect.bisect(a, item)
print('原字符序列是：',a)
print('待插入的字符是：',item)
print('插入字符的下标是：',position)  # 如果放到有序序列中，应该存在的索引位置

# 使用列表的insert方法插入对应位置
a.insert(position, item)
print('插入后的字符序列是：',a)

operation result:

 

Seven, ask for the lowest price

1. Find the lowest mobile phone prices in 4 stores

Implementation steps

1. 1. Define containers (lists, tuples, dictionaries) to store prices and use loop input
   2. Define the variable min to save the current lowest price
   3. Compare min with the rest of the elements in the array in turn

 The implementation code is as follows:

print('请输入四家店的价格：')

min_Price =0
arrPrice = []
i = 1

while i<= 4:
    s = int(input('请输入第%d家店的价格:'%i))
    i += 1
    arrPrice.append(s)
    arrPrice.sort()

for min_Price in arrPrice:
    if s < min_Price:
        min_Price = s;

print('最低的价格是：',min_Price)

operation result: