常用算法的python实现

1、乘法表

#! -*- coding:utf-8  -*-

for i in range(1,10):
    for j in range(1,i+1):
        print('%d*%d=%d\t' % (i, j, i*j)),
    print'\r'

1*1=1
2*1=2 2*2=4
3*1=3 3*2=6 3*3=9
4*1=4 4*2=8 4*3=12 4*4=16
5*1=5 5*2=10 5*3=15 5*4=20 5*5=25
6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36
7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49
8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64
9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81

2、回文数

#! -*- coding:utf-8  -*-

num = raw_input('请输入一个整数： ')

for i in range(len(num)/2):
    if num[i] == num[-i-1]:
        print('%s 是一个回文数' % num)
    else:
        print('%s 不是一个回文数' % num)

3、阶乘

#! -*- coding:utf-8  -*-


def f(n):
    if n < 0:
        print('负数没有阶乘')
    elif n == 0:
        return 1
    elif n == 1:
        return 1
    else:
        return n*f(n-1)

def jiesum(n):
    sum = 0
    for i in range(1, n+1):
        sum += f(i)
    return sum


number = int(raw_input('请输入一个整数： '))
result = f(number)
sum = jiesum(number)
print('%d 的阶乘是%d' % (number, result))
print('%d 的阶乘和是%d' % (number, sum))

4、字符串去重

#! -*- coding:utf-8  -*-

# 字符串去重
str = 'zhang jingjing'
lst = []

for i in str:
    if i not in lst:
        lst.append(i)
print ''.join(lst)


# 把字符串sign替换成空格

str1 = 'title=华为招聘会&time=20190305&sign=zhang&name=jing'
lst1 = []
for i in str1.split('&'):
    if i.startswith('sign='):
        lst1.append('sign= ')
    else:
        lst1.append(i)
print '&'.join(lst1)

5、冒泡排序法

#! -*- coding:utf-8  -*-
# list = [1,5,4,78]

# n个数比n-1轮

# 1  - n-1-1


# i   n-i-1
num = raw_input('输入一组数： ')
# print(num)    str
list = num.split(',')    #  list
# list = list(num)
print(list)
for i in range(len(list)-1):
    for j in range(len(list)-i-1):
        if list[j]>list[j+1]:
            list[j],list[j+1] = list[j+1],list[j]
print(list)

6、自动生成扑克牌，输入1随机发一张牌，输入2随机发2张牌。。。输入0停止发牌并把之前的牌全部返回

#! -*- coding:utf-8  -*-
import random


def auto():
    pokers = []
    poker = []
    list1 = ['R', 'B', 'F', 'M']
    list2 = ['A', 2, 3, 4, 5, 6, 7, 8, 9, 10, 'J', 'K', 'Q']
    for i in list1:
        for j in list2:
            poker.append(i)
            poker.append(j)
            pokers.append(poker)
            poker = []
    pokers.append(['bighero'])
    pokers.append(['smallhero'])
    # random.shuffle(pokers)
    return pokers


def fapai(poker, n):
    if n != 0:
        return random.sample(poker, n)
    else:
        print('请输入一个整数')


pokers = auto()
print(pokers)
result = []
while True:
    number = int(raw_input('请输入一个整数： '))
    if number != 0:
        rand1 = fapai(pokers, number)
        print(rand1)
        for i in rand1:
            result.append(i)
    else:
        print(result)
        break

学习路上的同志共勉！