墻裂建議收藏，100 道 Python 練手題目

total=0for i in range(1,5):    for j in range(1,5):        for k in range(1,5):            if ((i!=j)and(j!=k)and(k!=i)):                print(i,j,k)                total+=1print(total)

import itertoolssum2=0a=[1,2,3,4]for i in itertools.permutations(a,3):    print(i)    sum2+=1print(sum2)

profit=int(input('Show me the money: '))bonus=0thresholds=[100000,100000,200000,200000,400000]rates=[0.1,0.075,0.05,0.03,0.015,0.01]for i in range(len(thresholds)):    if profit<=thresholds[i]:        bonus+=profit*rates[i]        profit=0        break    else:        bonus+=thresholds[i]*rates[i]        profit-=thresholds[i]bonus+=profit*rates[-1]print(bonus)

n=0while (n+1)**2-n*n<=168:    n+=1
print(n+1)

n=0while (n+1)**2-n*n<=168:    n+=1
for i in range((n+1)**2):    if i**0.5==int(i**0.5) and (i+168)**0.5==int((i+168)**0.5):        print(i-100)

def isLeapYear(y):    return (y%400==0 or (y%4==0 and y%100!=0))DofM=[0,31,28,31,30,31,30,31,31,30,31,30]res=0year=int(input('Year:'))month=int(input('Month:'))day=int(input('day:'))if isLeapYear(year):    DofM[2]+=1for i in range(month):    res+=DofM[i]print(res+day)

raw=[]for i in range(3):    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)

raw2=[]for i in range(3):    x=int(input('int%d: '%(i)))    raw2.append(x)print(sorted(raw2))

def Fib(n):    return 1 if n<=2 else Fib(n-1)+Fib(n-2)print(Fib(int(input())))
樸素實(shí)現(xiàn)target=int(input())res=0a,b=1,1for i in range(target-1):    a,b=b,a+bprint(a)

import copya = [1,2,3,4,['a','b']]
b = a          # 賦值c = a[:]        # 淺拷貝d = copy.copy(a)    # 淺拷貝e = copy.deepcopy(a)  # 深拷貝
a.append(5)a[4].append('c')
print('a=',a)print('b=',b)print('c=',c)print('d=',d)print('e=',e)

for i in range(1,10):    for j in range(1,i+1):        print('%d*%d=%2ld '%(i,j,i*j),end='')    print()

import timefor i in range(4):    print(str(int(time.time()))[-2:])    time.sleep(1)

import time
for i in range(4):    print(time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())))    time.sleep(1)

month=int(input('繁殖幾個(gè)月？：'))month_1=1month_2=0month_3=0month_elder=0for i in range(month):    month_1,month_2,month_3,month_elder=month_elder+month_3,month_1,month_2,month_elder+month_3    print('第%d個(gè)月共'%(i+1),month_1+month_2+month_3+month_elder,'對(duì)兔子')    print('其中1月兔：',month_1)    print('其中2月兔：',month_2)    print('其中3月兔：',month_3)    print('其中成年兔：',month_elder)

import mathfor i in range(100,200):    flag=0    for j in range(2,round(math.sqrt(i))+1):        if i%j==0:            flag=1            break    if flag:        continue    print(i)

print('\nSimplify the code with "else"\n')

for i in range(100,200):    for j in range(2,round(math.sqrt(i))+1):        if i%j==0:            break    else:        print(i)

for i in range(100,1000):    s=str(i)    one=int(s[-1])    ten=int(s[-2])    hun=int(s[-3])    if i == one**3+ten**3+hun**3:        print(i)

target=int(input('輸入一個(gè)整數(shù)：'))print(target,'= ',end='')
if target<0:    target=abs(target)    print('-1*',end='')
flag=0if target<=1:    print(target)    flag=1

while True:    if flag:        break    for i in range(2,int(target+1)):        if target%i==0:            print("%d"%i,end='')            if target==i:                flag=1                break            print('*',end='')            target/=i            break

points=int(input('輸入分?jǐn)?shù)：'))if points>=90:    grade='A'elif points<60:    grade='C'else:    grade='B'print(grade)

import datetimeprint(datetime.date.today())print(datetime.date(2333,2,3))print(datetime.date.today().strftime('%d/%m/%Y'))day=datetime.date(1111,2,3)day=day.replace(year=day.year+22)print(day)

string=input("輸入字符串：")alp=0num=0spa=0oth=0for i in range(len(string)):    if string[i].isspace():        spa+=1    elif string[i].isdigit():        num+=1    elif string[i].isalpha():        alp+=1    else:        oth+=1print('space: ',spa)print('digit: ',num)print('alpha: ',alp)print('other: ',oth)

a=input('被加數(shù)字：')n=int(input('加幾次？：'))res=0for i in range(n):    res+=int(a)    a+=a[0]print('結(jié)果是：',res)

def factor(num):    target=int(num)    res=set()    for i in range(1,num):        if num%i==0:            res.add(i)            res.add(num/i)    return res
for i in range(2,1001):    if i==sum(factor(i))-i:        print(i)

high=200.total=100for i in range(10):    high/=2    total+=high    print(high/2)print('總長(zhǎng)：',total)

peach=1for i in range(9):    peach=(peach+1)*2print(peach)

a=set(['x','y','z'])b=set(['x','y','z'])c=set(['x','y','z'])c-=set(('x','y'))a-=set('x')for i in a:    for j in b:        for k in c:            if len(set((i,j,k)))==3:                print('a:%s,b:%s,c:%s'%(i,j,k))

def draw(num):    a="*"*(2*(4-num)+1)    print(a.center(9,' '))    if num!=1:        draw(num-1)        print(a.center(9,' '))draw(4)

a = 2.0b = 1.0s = 0for n in range(1,21):    s += a / b    a,b = a + b,aprint (s)

res=1for i in range(20,1,-1):    res=i*res+1print(res)

def factorial(n):    return n*factorial(n-1) if n>1 else 1print(factorial(5))

def rec(string):    if len(string)!=1:        rec(string[1:])    print(string[0],end='')
rec(input('string here:'))

def age(n):    if n==1:        return 10    return 2+age(n-1)print(age(5))

n=int(input('輸入一個(gè)正整數(shù)：'))n=str(n)print('%d位數(shù)'%len(n))print(n[::-1])

n=input("隨便你輸入啥啦：")a=0b=len(n)-1flag=Truewhile a<b:    if n[a]!=n[b]:        print('不是回文串')        flag=False        break    a,b=a+1,b-1if flag:    print('是回文串')

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('請(qǐng)輸入第一位字母:')).lower()]if a==weekT or a==weekS:    print(a[str(input('請(qǐng)輸入第二位字母:')).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 + "警告的顏色字體?" + 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=0for 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]        breakprint(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('第一種實(shí)現(xiàn)：')print(lis)

lis=[1,10,100,1000,10000,100000]print('第二種實(shí)現(xiàn)：')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=0n=0def dummy():    i=0    print(i)    i+=1def dummy2():    global n    print(n)    n+=1print('函數(shù)內(nèi)部的同名變量')for j in range(20):    print(i)    dummy()    i+=1print('global聲明同名變量')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=1for 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=0for i in range(1,101):    res+=iprint(res)

while True:    try:        n=float(input('輸入一個(gè)數(shù)字：'))    except:        print('輸入錯(cuò)誤')        continue    dn=n**2    print('其平方為：',dn)    if dn<50:        print('平方小于50，退出')        break

def exc(a,b):    return (b,a)a=0b=10a,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 randomprint(random.uniform(10,20))

a=0o77print(a)b=a&3print(b)b=b&7print(b)

a=0o77print(a|3)print(a|3|7)

a=0o77print(a^3)print(a^3^7)

a=int(input('輸入一個(gè)數(shù)字: '))b=0                 #     0b=~b                #     1b=b<<4              # 10000b=~b                #  1111c=a>>4d=c&bprint('a:',bin(a))print('b:',bin(b))print('c:',bin(c))print('d:',bin(d))

print(~234)print(~~234)

from tkinter import *canvas=Canvas(width=800,height=600,bg='yellow')canvas.pack(expand=YES,fill=BOTH)k=1j=1for i in range(26):    canvas.create_oval(310-k,250-k,310+k,250+k,width=1)    k+=j    j+=0.3mainloop()

if __name__ == '__main__':    from tkinter import *
    canvas = Canvas(width=300, height=300, bg='green')       canvas.pack(expand=YES, fill=BOTH)                      x0 = 263    y0 = 263    y1 = 275    x1 = 275    for i in range(19):        canvas.create_line(x0,y0,x0,y1, width=1, fill='red')        x0 = x0 - 5        y0 = y0 - 5        x1 = x1 + 5        y1 = y1 + 5
    x0 = 263    y1 = 275    y0 = 263    for i in range(21):        canvas.create_line(x0,y0,x0,y1,fill = 'red')        x0 += 5        y0 += 5        y1 += 5
    mainloop()

if __name__ == '__main__':    from tkinter import *    root = Tk()    root.title('Canvas')    canvas = Canvas(root,width = 400,height = 400,bg = 'yellow')    x0 = 263    y0 = 263    y1 = 275    x1 = 275    for i in range(19):        canvas.create_rectangle(x0,y0,x1,y1)        x0 -= 5        y0 -= 5        x1 += 5        y1 += 5
    canvas.pack()    root.mainloop()

if __name__  == '__main__':    from tkinter import *    canvas = Canvas(width = 300,height = 300,bg = 'green')    canvas.pack(expand = YES,fill = BOTH)    x0 = 150    y0 = 100    canvas.create_oval(x0 - 10,y0 - 10,x0 + 10,y0 + 10)    canvas.create_oval(x0 - 20,y0 - 20,x0 + 20,y0 + 20)    canvas.create_oval(x0 - 50,y0 - 50,x0 + 50,y0 + 50)    import math    B = 0.809    for i in range(16):        a = 2 * math.pi / 16 * i        x = math.ceil(x0 + 48 * math.cos(a))        y = math.ceil(y0 + 48 * math.sin(a) * B)        canvas.create_line(x0,y0,x,y,fill = 'red')    canvas.create_oval(x0 - 60,y0 - 60,x0 + 60,y0 + 60)


    for k in range(501):        for i in range(17):            a = (2 * math.pi / 16) * i + (2 * math.pi / 180) * k            x = math.ceil(x0 + 48 * math.cos(a))            y = math.ceil(y0 + 48 + math.sin(a) * B)            canvas.create_line(x0,y0,x,y,fill = 'red')        for j in range(51):            a = (2 * math.pi / 16) * i + (2* math.pi / 180) * k - 1            x = math.ceil(x0 + 48 * math.cos(a))            y = math.ceil(y0 + 48 * math.sin(a) * B)            canvas.create_line(x0,y0,x,y,fill = 'red')    mainloop()

s='zhangguang101'print(len(s))

def generate(numRows):    r = [[1]]    for i in range(1,numRows):        r.append(list(map(lambda x,y:x+y, [0]+r[-1],r[-1]+[0])))    return r[:numRows]a=generate(10)for i in a:    print(i)

s1='aabbxuebixuebi's2='ab's3='xue'print(s1.find(s2))print(s1.find(s3))

if __name__ == '__main__':    from tkinter import *    x = 360    y = 160    top = y - 30    bottom = y - 30
    canvas = Canvas(width = 400,height = 600,bg = 'white')    for i in range(20):        canvas.create_oval(250 - top,250 - bottom,250 + top,250 + bottom)        top -= 5        bottom += 5    canvas.pack()    mainloop()

if __name__ == '__main__':    from tkinter import *    canvas = Canvas(width = 400,height = 600,bg = 'white')    left = 20    right = 50    top = 50    num = 15    for i in range(num):        canvas.create_oval(250 - right,250 - left,250 + right,250 + left)        canvas.create_oval(250 - 20,250 - top,250 + 20,250 + top)        canvas.create_rectangle(20 - 2 * i,20 - 2 * i,10 * (i + 2),10 * ( i + 2))        right += 5        left += 5        top += 10

    canvas.pack()    mainloop()

import mathfrom tkinter import *

class PTS:    def __init__(self):        self.x = 0        self.y = 0points = []

def LineToDemo():    screenx = 400    screeny = 400    canvas = Canvas(width = screenx,height = screeny,bg = 'white')

    AspectRatio = 0.85    MAXPTS = 15    h = screeny    w = screenx    xcenter = w / 2    ycenter = h / 2    radius = (h - 30) / (AspectRatio * 2) - 20    step = 360 / MAXPTS    angle = 0.0    for i in range(MAXPTS):        rads = angle * math.pi / 180.0        p = PTS()        p.x = xcenter + int(math.cos(rads) * radius)        p.y = ycenter - int(math.sin(rads) * radius * AspectRatio)        angle += step        points.append(p)    canvas.create_oval(xcenter - radius,ycenter - radius,                       xcenter + radius,ycenter + radius)    for i in range(MAXPTS):        for j in range(i,MAXPTS):            canvas.create_line(points[i].x,points[i].y,points[j].x,points[j].y)

    canvas.pack()    mainloop()if __name__ == '__main__':    LineToDemo()

raw=[]for i in range(3):    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)

raw2=[]for i in range(3):    x=int(input('int%d: '%(i)))    raw2.append(x)print(sorted(raw2))

li=[3,2,5,7,8,1,5]

li[-1],li[li.index(min(li))]=li[li.index(min(li))],li[-1]

m=li[0]ind=li.index(max(li))li[0]=li[ind]li[ind]=m

print(li)

from collections import *li=[1,2,3,4,5,6,7,8,9]deq=deque(li,maxlen=len(li))print(li)deq.rotate(int(input('rotate:')))print(list(deq))

if __name__ == '__main__':    nmax = 50    n = int(input('請(qǐng)輸入總?cè)藬?shù):'))    num = []    for i in range(n):        num.append(i + 1)
    i = 0    k = 0    m = 0
    while m < n - 1:        if num[i] != 0 : k += 1        if k == 3:            num[i] = 0            k = 0            m += 1        i += 1        if i == n : i = 0
    i = 0    while num[i] == 0: i += 1    print(num[i])

def lenofstr(s):    return len(s)

print(lenofstr('tanxiaofengsheng'))

N = 3#stu#num : string#name : string#score[4]: liststudent = []for i in range(5):    student.append(['','',[]])
def input_stu(stu):    for i in range(N):        stu[i][0] = input('input student num:\n')        stu[i][1] = input('input student name:\n')        for j in range(3):            stu[i][2].append(int(input('score:\n')))
def output_stu(stu):    for i in range(N):        print ('%-6s%-10s' % ( stu[i][0],stu[i][1] ))        for j in range(3):            print ('%-8d' % stu[i][2][j])
if __name__ == '__main__':    input_stu(student)    print (student)    output_stu(student)

class Node:

    def __init__(self, data):        self.data = data        self.next = None

    def get_data(self):        return self.data

class List:

    def __init__(self, head):        self.head = head

    def is_empty(self):         return self.get_len() == 0

    def get_len(self):          length = 0        temp = self.head        while temp is not None:            length += 1            temp = temp.next        return length

    def append(self, node):        temp = self.head        while temp.next is not None:            temp = temp.next        temp.next = node

    def delete(self, index):         if index < 1 or index > self.get_len():            print("給定位置不合理")            return        if index == 1:            self.head = self.head.next            return        temp = self.head        cur_pos = 0        while temp is not None:            cur_pos += 1            if cur_pos == index-1:                temp.next = temp.next.next            temp = temp.next

    def insert(self, pos, node):        if pos < 1 or pos > self.get_len():            print("插入結(jié)點(diǎn)位置不合理")            return        temp = self.head        cur_pos = 0        while temp is not Node:            cur_pos += 1            if cur_pos == pos-1:                node.next = temp.next                temp.next =node                break            temp = temp.next

    def reverse(self, head):        if head is None and head.next is None:            return head        pre = head        cur = head.next        while cur is not None:            temp = cur.next            cur.next = pre            pre = cur            cur = temp        head.next = None        return pre

    def print_list(self, head):        init_data = []        while head is not None:            init_data.append(head.get_data())            head = head.next        return init_data

if __name__=='__main__':    head=Node('head')    link=List(head)    for i in range(10):        node=Node(i)        link.append(node)    print(link.print_list(head))

class Node:

    def __init__(self, data):        self.data = data        self.next = None

    def get_data(self):        return self.data

class List:

    def __init__(self, head):        self.head = head

    def is_empty(self):         return self.get_len() == 0

    def get_len(self):          length = 0        temp = self.head        while temp is not None:            length += 1            temp = temp.next        return length

    def append(self, node):        temp = self.head        while temp.next is not None:            temp = temp.next        temp.next = node

    def delete(self, index):         if index < 1 or index > self.get_len():            print("給定位置不合理")            return        if index == 1:            self.head = self.head.next            return        temp = self.head        cur_pos = 0        while temp is not None:            cur_pos += 1            if cur_pos == index-1:                temp.next = temp.next.next            temp = temp.next

    def insert(self, pos, node):        if pos < 1 or pos > self.get_len():            print("插入結(jié)點(diǎn)位置不合理")            return        temp = self.head        cur_pos = 0        while temp is not Node:            cur_pos += 1            if cur_pos == pos-1:                node.next = temp.next                temp.next =node                break            temp = temp.next

    def reverse(self, head):        if head is None and head.next is None:            return head        pre = head        cur = head.next        while cur is not None:            temp = cur.next            cur.next = pre            pre = cur            cur = temp        head.next = None        return pre

    def print_list(self, head):        init_data = []        while head is not None:            init_data.append(head.get_data())            head = head.next        return init_data

if __name__=='__main__':    head=Node('head')    link=List(head)    for i in range(10):        node=Node(i)        link.append(node)    print(link.print_list(head))    print(link.print_list(link.reverse(head)))

a=[2,6,8]b=[7,0,4]a.extend(b)a.sort()print(a)

if __name__ == '__main__':    for i in range(5):        n = 0        if i != 1: n += 1        if i == 3: n += 1        if i == 4: n += 1        if i != 4: n += 1        if n == 3: print (64 + i)

def peven(n):    i = 0    s = 0.0    for i in range(2,n + 1,2):        s += 1.0 / i    return s
def podd(n):    s = 0.0    for i in range(1, n + 1,2):        s += 1.0 / i    return s
def dcall(fp,n):    s = fp(n)    return s
if __name__ == '__main__':    n = int(input('input a number: '))    if n % 2 == 0:        sum = dcall(peven,n)    else:        sum = dcall(podd,n)    print (sum)

l=['moyu','niupi','xuecaibichi','shengfaji','42']for i in range(len(l)):    print(l[i])

if __name__ == '__main__':    person = {"li":18,"wang":50,"zhang":20,"sun":22}    m = 'li'    for key in person.keys():        if person[m] < person[key]:            m = key
    print ('%s,%d' % (m,person[m]))

l=['baaa','aaab','aaba','aaaa','abaa']l.sort()print(l)

if __name__ == '__main__':    i = 0    j = 1    x = 0    while (i < 5) :        x = 4 * j        for i in range(0,5) :            if(x%4 != 0) :                break            else :                i += 1            x = (x/4) * 5 +1        j += 1    print(x)

    for p in range(5):        x=(x-1)/5*4    print(x)

a = 809for i in range(10,100):    b = i * a    if b >= 1000 and b <= 10000 and 8 * i < 100 and 9 * i >= 100:        print(b,' = 800 * ', i, ' + 9 * ', i)
for i in range(10,100):    if 8*i>99 or 9*i<100:        continue    if 809*i==800*i+9*i:        print(i)        break

n=eval('0o'+str(int(input('八進(jìn)制輸入：'))))print(n)

if __name__ == '__main__':    sum = 4    s = 4    for j in range(2,9):        print (sum)        if j <= 2:            s *= 7        else:            s *= 8        sum += s    print('sum = %d' % sum)

delimiter = ','mylist = ['Brazil', 'Russia', 'India', 'China']print(delimiter.join(mylist))

if __name__ == '__main__':    zi = int(input('輸入一個(gè)數(shù)字:'))    n1 = 1    c9 = 1    m9 = 9    sum = 9    while n1 != 0:        if sum % zi == 0:            n1 = 0        else:            m9 *= 10            sum += m9            c9 += 1    print ('%d 個(gè) 9 可以被 %d 整除 : %d' % (c9,zi,sum))    r = sum / zi    print ('%d / %d = %d' % (sum,zi,r))

a='guangtou'b='feipang'print(b+a)

if __name__ == '__main__':    class student:        x = 0        c = 0    def f(stu):        stu.x = 20        stu.c = 'c'    a= student()    a.x = 3    a.c = 'a'    f(a)    print(a.x,a.c)

for i in range(3):    print('*'*int(input('input a number: ')))

n=input()n = str(n)a=[]for i in range(4):    a.append(int(n[i])+5)a[0],a[3]=a[3],a[0]a[1],a[2]=a[2],a[1]print ("".join('%s' %s for s in a))

#list  #新建列表 testList=[10086,'中國(guó)移動(dòng)',[1,2,4,5]]  
#訪問列表長(zhǎng)度  print (len(testList)  )#到列表結(jié)尾 print (testList[1:])#向列表添加元素    testList.append('i\'m new here!')  
print (len(testList)  )print (testList[-1]  )#彈出列表的最后一個(gè)元素  print (testList.pop(1)  )print (len(testList)  )print (testList  )st comprehension  #后面有介紹，暫時(shí)掠過  matrix = [[1, 2, 3],  [4, 5, 6],  [7, 8, 9]]  print (matrix  )print (matrix[1]  )col2 = [row[1] for row in matrix]#get a  column from a matrix  print (col2  )col2even = [row[1] for row in matrix if  row[1] % 2 == 0]#filter odd item  print (col2even)

if __name__ == '__main__':    import time    print (time.ctime(time.time()))    print (time.asctime(time.localtime(time.time())))    print (time.asctime(time.gmtime(time.time())))

if __name__ == '__main__':    import time    start = time.time()    for i in range(3000):        print(i)    end = time.time()
    print (end - start)

if __name__ == '__main__':    import time    start = time.clock()    for i in range(100):        print(i)    end = time.clock()    print('different is %6.3f' % (end - start))

if __name__ == '__main__':    import time    import random
    play_it = input('do you want to play it.(\'y\' or \'n\')')    while play_it == 'y':        c = input('input a character:\n')        i = random.randint(0,2**32) % 100        print ('please input number you guess:\n')        start = time.clock()        a = time.time()        guess = int(input('input your guess:\n'))        while guess != i:            if guess > i:                print('please input a little smaller')                guess = int(input('input your guess:\n'))            else:                print('please input a little bigger')                guess = int(input('input your guess:\n'))        end = time.clock()        b = time.time()        var = (end - start) / 18.2        print (var)        # print 'It took you %6.3 seconds' % time.difftime(b,a))        if var < 15:            print ('you are very clever!')        elif var < 25:            print ('you are normal!')        else:            print ('you are stupid!')        print ('Congradulations')        print ('The number you guess is %d' % i)        play_it = input('do you want to play it.')

from dateutil import parserdt = parser.parse("Aug 28 2015 12:00AM")print (dt)

s1='xuebixuebixuebixuebixuebixuebixuebixue's2='xuebi'print(s1.count(s2))

if __name__ == '__main__':    from sys import stdout    filename = input('輸入文件名:\n')    fp = open(filename,"w")    ch = input('輸入字符串:\n')    while ch != '#':        fp.write(ch)        stdout.write(ch)        ch = input('')    fp.close()

if __name__ == '__main__':    fp = open('test.txt','w')    string = input('please input a string:\n')    string = string.upper()    fp.write(string)    fp = open('test.txt','r')    print (fp.read())    fp.close()

if __name__ == '__main__':    import string    fp = open('test1.txt')    a = fp.read()    fp.close()
    fp = open('test2.txt')    b = fp.read()    fp.close()
    fp = open('test3.txt','w')    l = list(a + b)    l.sort()    s = ''    s = s.join(l)    fp.write(s)    fp.close()

i = ['a', 'b']l = [1, 2]print (dict(zip(i,l)))