100 个 Python 小例子（练习题二）

weekT={'h':'thursday',
       'u':'tuesday'}
weekS={'a':'saturday',
       'u':'sunday'}
week={'t':weekT,
      's':weekS,
      'm':'monday',
      'w':'wensday',
      'f':'friday'}
a=week[str(input('请输入第一位字母:')).lower()]
if a==weekT or a==weekS:
    print(a[str(input('请输入第二位字母:')).lower()])
else:
    print(a)

a = ['one', 'two', 'three']
print(a[::-1])

L = [1,2,3,4,5]
print(','.join(str(n) for n in L))

def hello():
    print('Hello World!')
def helloAgain():
    for i in range(2):
        hello()

if __name__=='__main__':
    helloAgain()

class bcolors:
    HEADER = '\033[95m'
    OKBLUE = '\033[94m'
    OKGREEN = '\033[92m'
    WARNING = '\033[93m'
    FAIL = '\033[91m'
    ENDC = '\033[0m'
    BOLD = '\033[1m'
    UNDERLINE = '\033[4m'
print(bcolors.WARNING + "警告的颜色字体?" + bcolors.ENDC)

lo=int(input('下限：'))
hi=int(input('上限：'))
for i in range(lo,hi+1):
    if i > 1:
        for j in range(2,i):
            if (i % j) == 0:
                break
        else:
            print(i)

raw=[]
for i in range(10):
    x=int(input('int%d: '%(i)))
    raw.append(x)

for i in range(len(raw)):
    for j in range(i,len(raw)):
        if raw[i]>raw[j]:
            raw[i],raw[j]=raw[j],raw[i]
print(raw)

mat=[[1,2,3],
     [3,4,5],
     [4,5,6]
    ]
res=0
for i in range(len(mat)):
    res+=mat[i][i]
print(res)

lis=[1,10,100,1000,10000,100000]
n=int(input('insert a number: '))
lis.append(n)
for i in range(len(lis)-1):
    if lis[i]>=n:
        for j in range(i,len(lis)):
            lis[j],lis[-1]=lis[-1],lis[j]
        break
print(lis)

lis=[1,10,100,1000,10000,100000]
for i in range(int(len(lis)/2)):
    lis[i],lis[len(lis)-1-i]=lis[len(lis)-1-i],lis[i]
print('第一种实现：')
print(lis)


lis=[1,10,100,1000,10000,100000]
print('第二种实现：')
lis.reverse()
print(lis)

def dummy():
    i=0
    print(i)
    i+=1

class cls:
    i=0
    def dummy(self):
        print(self.i)
        self.i+=1

a=cls()
for i in range(50):
    dummy()
    a.dummy()

i=0
n=0
def dummy():
    i=0
    print(i)
    i+=1
def dummy2():
    global n
    print(n)
    n+=1
print('函数内部的同名变量')
for j in range(20):
    print(i)
    dummy()
    i+=1
print('global声明同名变量')
for k in range(20):
    print(n)
    dummy2()
    n+=10

class dummy:
    num=1
    def Num(self):
        print('class dummy num:',self.num)
        print('global num: ',num)
        self.num+=1

n=dummy()
num=1
for i in range(5):
    num*=10
    n.Num()

X = [[12,7,3],
    [4 ,5,6],
    [7 ,8,9]]

Y = [[5,8,1],
    [6,7,3],
    [4,5,9]]

res=[[0,0,0],
    [0,0,0],
    [0,0,0]]
for i in range(len(res)):
    for j in range(len(res[0])):
        res[i][j]=X[i][j]+Y[i][j]
print(res)

res=0
for i in range(1,101):
    res+=i
print(res)

while True:
    try:
        n=float(input('输入一个数字：'))
    except:
        print('输入错误')
        continue
    dn=n**2
    print('其平方为：',dn)
    if dn<50:
        print('平方小于50，退出')
        break

def exc(a,b):
    return (b,a)
a=0
b=10
a,b=exc(a,b)
print(a,b)

a=int(input('a='))
b=int(input('b='))
if a<b:
    print('a<b')
elif a>b:
    print('a>b')
else:
    print('a=b')

Max=lambda x,y:x*(x>=y)+y*(y>x)
Min=lambda x,y:x*(x<=y)+y*(y<x)

a=int(input('1:'))
b=int(input('2:'))

print(Max(a,b))
print(Min(a,b))

import random
print(random.uniform(10,20))