实现1-100的所有的和
sum1 = 0
while sum1 < 100:
sum1 += 1
print sum1
print ('-----' * 10)
实现1-500所有奇数的和
sum1 = 0 for i in xrange(1,501,2): sum1 += i print sum1
求1+ 2! + 3! + 4! + ……20！的和
a = 1 b = 0 for i in range(1,21): a = a*i b = b + a print(b)
对指定一个list进行排序[2,32,43,453,54,6,576,5,7,6,8,78,7,89]
a = [2,32,43,453,54,6,576,5,7,6,8,78,7,89] a.sort() print(a)
把一个数字的list从小到大排序，然后写入文件，然后从文件中读取出来文件内容，然后反序，在追加到文件的下一行中
import ast
import codecs
a = [2,32,43,453,54,6,576,5,7,6,8,78,7,89]
with codecs.open('1.txt','w') as f:
a.sort()
f.write(str(a))
with codecs.open('1.txt','r') as ff:
c = ast.literal_eval(ff.read())
c.reverse()
with codecs.open('1.txt','a') as fff:
fff.write(str(c))
分别把 string， list， tuple， dict写入到文件中
import codecs
a = 'abc'
b = [1, 2,]
c = ('a', 'b', 'c',)
d = {'Q':7, 'W':8, 'E':9,}
print(type(a))
print(type(b))
print(type(c))
print(type(d))
with codecs.open('2.txt', 'w') as f:
f.write(str(a))
f.write(str(b))
f.write(str(c))
f.write(str(d))
ABCD*9 = DCBA，使用Python计算abcd分别是哪些数字：
class CountNumber(object):
'''ABCD * 9 = DCBA
通过计算机的方法，给我们计算出A = ? B = ? C = ? D = ?
A: 1-9
B: 0-9
C: 0-9
D: 1-9
A != B != C !=D
'''
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 = {4}{5}{6}{7}".format(A,B,C,D,D,C,B,A))
print("A = {0}, B = {1}, C = {2}, D = {3}".format(A,B, C, D))
def main():
countNumber = CountNumber()
countNumber.numAbcd()
if __name__ == '__main__':
main()
使用Python计算九宫格
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()
passwd文件按uid正序排序 生成一个新的passwd文件，用Python实现
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()
线程练习题：
定义线程类
import codecs
from queue import Queue
from threading import Thread
import time
class Produce(Thread):
def __init__(self, queue):
super(Produce, self).__init__()
self.fileName = "../firstlession/passwd"
self.fileList = list()
self.queue = queue
def run(self):
with codecs.open(self.fileName) as f:
self.fileList += f.readlines()
for line in self.fileList:
self.queue.put(line)
class Consumer(Thread):
def __init__(self, queue):
self.queue = queue
super(Consumer, self).__init__()
self.newPasswd = "newpasswd.txt"
self.fileList = list()
self.stat = 1
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)
调用类，并写入主函数
from queue import Queue
from onlive.secondlesson.threadtest import Produce, Consumer
def main():
q = Queue()
produce = Produce(q)
consumer = Consumer(q)
produce.start()
consumer.start()
if __name__ == '__main__':
main()
socket编程
服务端：
from onlive.sockettest.util import SocketServerTest
if __name__ == '__main__':
socketServer = SocketServerTest(host="0.0.0.0", port=9999, type="tcp", backlog=5)
socketServer.run()
客户端：
from onlive.sockettest.util import ClientSocketTest
if __name__ == '__main__':
socketClient = ClientSocketTest(host="127.0.0.1", port=9999, type="tcp")
socketClient.run()
主函数：
import socket
import time
class InitSocketTest(object):
def __init__(self, host, port, type):
self.host = host
self.port = port
self.address = (host, port)
self.type = type
self.s = None
self.creatsocket()
def creatsocket(self):
if self.type.upper() == "TCP":
self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
elif self.type.upper == "UDP":
self.s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
else:
print("you must input the InitSocket(type) is 'UDP|TCP' ")
class SocketServerTest(InitSocketTest):
def __init__(self, host, port, type, backlog):
self.backlog = backlog
super(SocketServerTest, self).__init__(host, port, type)
self.clientAddress = None
def run(self):
self.s.bind(self.address)
self.s.listen(self.backlog)
print("server starting…………")
conn, self.clientAddress = self.s.accept()
print("accept connect from {0}".format(self.clientAddress))
for i in range(1, 10):
conn.sendall("i = {0}".format(str(i)).encode("utf-8"))
self.s.close()
class ClientSocketTest(InitSocketTest):
def run(self):
self.s.connect(self.address)
stat = 1
while 1:
data = self.s.recv(2048)
if len(data)>0:
stat = 1
print(data.decode("utf-8"))
else:
stat += 1
time.sleep(1)
if stat == 5:
break
用Python实现ssh客户端
server端
import paramiko
import time
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
# 上面是用来设置known-host
host = "192.168.48.131"
port = 22
username = "root"
passwd = "123456"
client.connect(hostname=host, port=port, username=username, password=passwd)
stat = 1
while 1:
cmd = input("{0}>> ".format(host))
if cmd:
stat = 1
stdin, stdout, stderr = client.exec_command(cmd)
for std in stdout.readlines():
print(std)
else:
stat += 1
time.sleep(1)
if stat == 5:
break
client端
import socket
import time
if __name__ == '__main__':
host = "192.168.48.131"
port = 12345
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((host, port))
stat = 1
while 1:
cmd = input("{0}>>> ".format(host))
if cmd.lower() == "exit":
exit()
if not cmd:
continue
s.sendall(cmd.encode("utf-8"))
data = s.recv(2048)
redata = data.decode("utf-8").replace("\n", "\r\n")
# print(type(data))
if len(data)>0:
stat = 1
print("{0}".format(redata))
else:
stat += 1
time.sleep(1)
if stat == 5:
break