1.ABCD乘于9 = DCBA，求ABCD的值，且ABCD均互不相等
#!/usr/bin/env python # -*- coding:utf-8 -*- # @Time :2017/12/26 16:11 # @Author :huangdongju # @File :1.py '''ABCD乘于9 = DCBA，求ABCD的值，且ABCD均互不相等''' class CountNumer(object): def __init__(self): print("ABCD*9=DCBA; A != B! =C != D") def numAbcd(self): for A in range(1,10): for B in range(0,10): for C in range(0,10): for D in range(1,10): if (A*1000 + B*100 + C*10 + D)*9 == (D *1000 + C*100 + B*10 + A): print("{0}{1}{2}{3}*9 = {3}{2}{1}{0}".format(A,B,C,D)) print("A = {0}, B = {1},C = {2}, D={3}".format(A,B,C,D)) def main(): countNumber = CountNumer() countNumber.numAbcd() if __name__ == '__main__': main()
结果：
2.九宫格，相加等于15
#!/usr/bin/env python # -*- coding:utf-8 -*- # @Time :2017/12/26 16:50 # @Author :huangdongju # @File :2.py '''九宫格，相加等于15''' class NinePaper(object): def __init__(self): print(''' _____________ |_A_|_B_|_C_| |_D_|_E_|_F_| |_G_|_H_|_I_| A, B, C, D, E, F, G, H, I 必须是1-9数字，且不能重复 所有的行，列，对角线的和都为15 ''' ) self.numbers = list() for i in range(1,10): self.numbers.append(i) print("numbers = {0}".format(self.numbers)) def run(self): for A in range(1,10): l1 = list() l1 += self.numbers l1.remove(A) for B in l1: l2 = list() l2 += l1 l2.remove(B) for C in l2: l3 = list() l3 += l2 l3.remove(C) for D in l3: l4 = list() l4 += l3 l4.remove(D) for E in l4: l5 = list() l5 += l4 l5.remove(E) for F in l5: l6 = list() l6 += l5 l6.remove(F) for G in l6: l7 = list() l7 += l6 l7.remove(G) for H in l7: l8 = list() l8 += l7 l8.remove(H) for I in l8: if A + B + C == D + E + F == G + H + I == A + D + G == B + E + H == C + F + I == A + E + I == C + E + G == 15: print(''' _____________ |_{0}_|_{1}_|_{2}_| |_{3}_|_{4}_|_{5}_| |_{6}_|_{7}_|_{8}_| '''.format(A, B, C, D, E, F, G, H, I)) def main(): ninePaper = NinePaper() ninePaper.run() if __name__ == '__main__': main()
结果：
_____________
|_A_|_B_|_C_|
|_D_|_E_|_F_|
|_G_|_H_|_I_|
A, B, C, D, E, F, G, H, I 必须是1-9数字，且不能重复
所有的行，列，对角线的和都为15
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9]
_____________
|_2_|_7_|_6_|
|_9_|_5_|_1_|
|_4_|_3_|_8_|
_____________
|_2_|_9_|_4_|
|_7_|_5_|_3_|
|_6_|_1_|_8_|
_____________
|_4_|_3_|_8_|
|_9_|_5_|_1_|
|_2_|_7_|_6_|
_____________
|_4_|_9_|_2_|
|_3_|_5_|_7_|
|_8_|_1_|_6_|
_____________
|_6_|_1_|_8_|
|_7_|_5_|_3_|
|_2_|_9_|_4_|
_____________
|_6_|_7_|_2_|
|_1_|_5_|_9_|
|_8_|_3_|_4_|
_____________
|_8_|_1_|_6_|
|_3_|_5_|_7_|
|_4_|_9_|_2_|
_____________
|_8_|_3_|_4_|
|_1_|_5_|_9_|
|_6_|_7_|_2_|
3.对/etc/passwd文件进行排序
#!/usr/bin/env python # -*- coding:utf-8 -*- # @Time :2017/12/27 15:52 # @Author :huangdongju # @File :3.py import codecs import os class SortPasswd(object): def __init__(self): self.passwd = "passwd" self.newpasswd = "newpasswd" self.contextList = list() if not os.path.exists(self.passwd): print("please download passwd from linux.") exit(1) print("sort file is :{0}".format(self.passwd)) print("sorted file is :{0}".format(self.newpasswd)) def getContextList(self): with codecs.open("passwd") as fr: self.contextList += sorted(fr.readlines(),key= lambda line:int(line.split(":")[2]),reverse=False) def writeContextList(self): with codecs.open("new_passwd","w") as fw: fw.writelines(self.contextList) def main(): sortpasswd = SortPasswd() sortpasswd.getContextList() sortpasswd.writeContextList() if __name__ == '__main__': main()
passwd文件：
root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin operator:x:11:0:operator:/root:/sbin/nologin games:x:12:100:games:/usr/games:/sbin/nologin gopher:x:13:30:gopher:/var/gopher:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin nobody:x:99:99:Nobody:/:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin rpc:x:32:32:Rpcbind Daemon:/var/cache/rpcbind:/sbin/nologin saslauth:x:499:76:Saslauthd user:/var/empty/saslauth:/sbin/nologin postfix:x:89:89::/var/spool/postfix:/sbin/nologin rpcuser:x:29:29:RPC Service User:/var/lib/nfs:/sbin/nologin nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin haldaemon:x:68:68:HAL daemon:/:/sbin/nologin
排序后的结果：
root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin operator:x:11:0:operator:/root:/sbin/nologin games:x:12:100:games:/usr/games:/sbin/nologin gopher:x:13:30:gopher:/var/gopher:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin rpcuser:x:29:29:RPC Service User:/var/lib/nfs:/sbin/nologin rpc:x:32:32:Rpcbind Daemon:/var/cache/rpcbind:/sbin/nologin haldaemon:x:68:68:HAL daemon:/:/sbin/nologin vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin postfix:x:89:89::/var/spool/postfix:/sbin/nologin nobody:x:99:99:Nobody:/:/sbin/nologin saslauth:x:499:76:Saslauthd user:/var/empty/saslauth:/sbin/nologin nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin
4.消息队列与线程的复习
消息队列是为了防止消息丢失，或者是调用方不需要一直等待响应方的结果。程序代码如下：
#!/usr/bin/env python # -*- coding:utf-8 -*- # @Time :2017/12/30 13:41 # @Author :huangdongju # @File :demon1.py #消息队列与多进程的结合 import codecs import time from threading import Thread from queue import Queue # 创建一个生产者类，通过多线程的方式进行传送 class Produce(Thread): # 创建构造器，创建构造器之后的第一步为继承，继承Produce def __init__(self,queue): super(Produce,self).__init__() self.fileName = "../online/passwd" self.fileList = list() self.queue = queue # 重写run方法，在run方法中打开文件 def run(self): with codecs.open(self.fileName) as f : self.fileList += f.readlines() for line in self.fileList: self.queue.put(line) # 创建消费者类 class Consumer(Thread): def __init__(self,queue): self.queue = queue super(Consumer,self).__init__() self.newPasswd = "newpasswd.txt" self.fileList = list() self.stat = 1 # 消息队列中10秒钟还没有新的数据，则断开连接。在等待的10的过程中，如果在第五秒的时候有数据 # 传输进来，则这10秒的计时应该又从0开始 def run(self): while 1: if self.queue.empty(): time.sleep(2) self.stat += 1 if self.stat == 5: break else: self.stat = 1 data = self.queue.get() self.fileList.append(data) with codecs.open(self.newPasswd,'w') as f: f.writelines(self.fileList) def main(): q = Queue() produce = Produce(q) consumer = Consumer(q) produce.start() consumer.start() if __name__ == '__main__': main()
执行结果为，在当前目录下生产一个新的文件newpasswd.txt
root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin operator:x:11:0:operator:/root:/sbin/nologin games:x:12:100:games:/usr/games:/sbin/nologin gopher:x:13:30:gopher:/var/gopher:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin nobody:x:99:99:Nobody:/:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin rpc:x:32:32:Rpcbind Daemon:/var/cache/rpcbind:/sbin/nologin saslauth:x:499:76:Saslauthd user:/var/empty/saslauth:/sbin/nologin postfix:x:89:89::/var/spool/postfix:/sbin/nologin rpcuser:x:29:29:RPC Service User:/var/lib/nfs:/sbin/nologin nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin haldaemon:x:68:68:HAL daemon:/:/sbin/nologin