11 2018 档案
摘要：#!/usr/bin/env pythonimport tensorflow as tf# 每个批次的大小batch_size = 50# 计算一共有多少个批次#n_batch = mnist.train.num_examples // batch_sizeinput_num = 16output_
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摘要：#!/usr/bin/env pythonimport tensorflow as tfinput_num = 16output_num = 11def create_file(path,output_num): with open(path,'r') as file: lines = file.r
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摘要：#!/usr/bin/env pythonimport tensorflow as tfimport numpy as npdef read_and_decode(filename): # 读入dog_train.tfrecords filename_queue = tf.train.string_
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摘要：#!/usr/bin/env pythonimport tensorflow as tfimport numpy as np# write = tf.python_io.TFRecordWriter('train.tfrecords')# #img_raw = np.random.random_in
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摘要：tensorflow读取数据-tfrecord格式 https://blog.csdn.net/happyhorizion/article/details/77894055 Tensorflow第三课数据加载 非图片数据 https://blog.csdn.net/clever_wr/article
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摘要：https://github.com/fo40225/tensorflow-windows-wheel pip install tensorflow-1.5.0-cp36-cp36m-win_amd64.whl https://blog.csdn.net/z564359805/article/det
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摘要：Iter 4820, Testing Accuracy= 0.45184085Iter 4840, Testing Accuracy= 0.4525846Iter 4860, Testing Accuracy= 0.45332837Iter 4880, Testing Accuracy= 0.454
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摘要：#!/usr/bin/env pythonimport tensorflow as tfimport osimport numpy as npimport refrom PIL import Imageimport matplotlib.pyplot as plt# In[2]:class Node
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摘要：import tensorflow as tfimport osimport tarfileimport requests# In[2]:# inception模型下载地址inception_pretrain_model_url = 'http://download.tensorflow.org/m
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摘要：#!/usr/bin/env python# coding: utf-8# In[1]:import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data# In[2]:# 载入数据集mnist = in
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摘要：import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data# In[2]:# 载入数据集mnist = input_data.read_data_sets("MNIST_data/", one_h
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摘要：Iter 0, Testing Accuracy= 0.9366Iter 1, Testing Accuracy= 0.9602Iter 2, Testing Accuracy= 0.9677Iter 3, Testing Accuracy= 0.9735Iter 4, Testing Accura
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摘要：#!/usr/bin/env pythonimport tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data# In[2]:mnist = input_data.read_data_sets('MNIST
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摘要：#!/usr/bin/env pythonimport tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_datafrom tensorflow.contrib.tensorboard.plugins impo
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摘要：import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data# In[2]:#载入数据集mnist = input_data.read_data_sets("MNIST_data",one_hot=
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摘要：#C:\Users\mxf\venv\Scriptsimport tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data# In[2]:# 载入数据集mnist = input_data.read_data
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摘要：import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data#载入数据集mnist = input_data.read_data_sets("MNIST_data",one_hot=True)#每个
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摘要：import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data# 载入数据集mnist = input_data.read_data_sets("MNIST_data", one_hot=True)#
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摘要：# coding: utf-8# In[2]:import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data# In[3]:#载入数据集mnist = input_data.read_data_set
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摘要：# coding: utf-8# In[1]:import tensorflow as tfimport numpy as npimport matplotlib.pyplot as plt# In[6]:#使用numpy生成200个随机点x_data = np.linspace(-0.5,0.5,
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摘要：#示例import numpy as npimport tensorflow as tfx_data = np.random.rand(100)y_data = .1 * x_data +.2## 构造一个线性模型优化器#优化 $y = kx+b$#待优化的参数b = tf.Variable(0.)
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摘要：import tensorflow as tfc1 = tf.constant([[3,3]])c2 = tf.constant([[3],[2]])product = tf.matmul(c1 , c2)with tf.Session() as sess: reslut = sess.run(pr
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摘要：import tensorflow as tf# print('haha')# a = tf.add(2,3)# print(a)# sess = tf.Session()# print(sess.run(a))# sess.close()# x = 2# y = 3# op1 = tf.add(x,y)# op2 = tf.multiply(x,y)# op3 = tf.pow(op2,op1)...
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摘要：1、css重用 <style> 如果整个页面的宽度 > 900px时： { .c{ 共有 } .c1{ 独有 } } .c2{ 独有 } </style> <div class='c c1'></div> <div class='c c2'></div> 2、自适应 和 改变大小变形 左右滚动条的出
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摘要：CSS 在标签上设置style属性： background-color: #2459a2; height: 48px; ... 编写css样式： 1. 标签的style属性 2. 写在head里面 style标签中写样式 - id选择区 #i1{ background-color: #2459a2;
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摘要：HTML 1、一套规则，浏览器认识的规则。 2、开发者： 学习Html规则 开发后台程序： - 写Html文件（充当模板的作用） ****** - 数据库获取数据，然后替换到html文件的指定位置（Web框架） 3、本地测试 - 找到文件路径，直接浏览器打开 - pycharm打开测试 4、编写Ht
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摘要：import socketdef handle_request(client): buf = client.recv(1024) client.send(bytes("HTTP/1.1 200 OK\r\n\r\n",encoding='utf-8')) f = open('index.html',
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摘要：http://www.cnblogs.com/web-d/archive/2010/04/16/1713298.html
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摘要：import selectorsimport socketsel = selectors.DefaultSelector()def accept(sock, mask): conn, addr = sock.accept() # Should be ready print('accepted', c
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摘要：import selectimport socketimport queueserver = socket.socket()server.bind(('localhost',9000))server.listen(1000)server.setblocking(False) #不阻塞msg_dic
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摘要：import sysimport socketimport timeimport geventfrom gevent import socket, monkeymonkey.patch_all()def server(port): s = socket.socket() s.bind(('0.0.0
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摘要：GET: https://www.python.org/50114 bytes received from https://www.python.org/.GET: https://www.yahoo.com/505000 bytes received from https://www.yahoo.
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摘要：Running in fooExplicit精确的 context内容 to barrunning func3 running func3 again Implicit context switch back to barExplicit context switch to foo again
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摘要：import timeimport queuedef consumer(name): print(" >starting eating baozi...") while True: new_baozi = yield print("[%s] is eating baozi %s" % (name,
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摘要：from multiprocessing import Process, Pool,freeze_supportimport timeimport osdef Foo(i): time.sleep(2) print("in process",os.getpid()) return i + 100de
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摘要：from multiprocessing import Process, Lockdef f(l, i): #l.acquire() print('hello world', i) #l.release()if __name__ == '__main__': lock = Lock() for nu
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摘要：from multiprocessing import Process, Managerimport osdef f(d, l): d[os.getpid()] =os.getpid() l.append(os.getpid()) print(l)if __name__ == '__main__':
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摘要：from multiprocessing import Process, Pipedef f(conn): conn.send([42, None, 'hello from child']) conn.send([42, None, 'hello from child3']) print("",co
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摘要：from multiprocessing import Process, Queueimport threading#import queue# def f(q):# q.put([42, None, 'hello'])def f(qq): print("in child:",qq.qsize())
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摘要：main process linemodule name: __main__parent process: 2728process id: 25524 called from child process function fmodule name: __mp_main__parent process
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摘要：from multiprocessing import Process import time def f(name): time.sleep(2) print('hello', name) if __name__ == '__main__': p = Process(target=f, args=
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摘要：import threading,timeimport queueq = queue.Queue(maxsize=10)def Producer(name): count = 1 while True: q.put("骨头%s" % count) print("生产了骨头",count) count
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摘要：queue is especially useful in threaded programming when information must be exchanged safely between multiple threads.
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摘要：import timeimport threadingevent = threading.Event()def lighter(): count = 0 event.set() #先设置绿灯 while True: if count >5 and count < 10: #改成红灯 event.cl
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摘要：import threading, timedef run(n): semaphore.acquire() time.sleep(1) print("run the thread: %s\n" % n) semaphore.release()if __name__ == '__main__': se
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摘要：import threading, timedef run1(): print("grab the first part data") lock.acquire() global num num += 1 lock.release() return numdef run2(): print("gra
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摘要：import threadingimport timedef run(n): lock.acquire() global num num +=1 lock.release() time.sleep(1)lock = threading.Lock()num = 0t_objs = [] #存线程实例f
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摘要：import threadingimport timedef run(n): print("task ",n ) time.sleep(2) print("task done",n)start_time = time.time()t_objs = [] #存线程实例for i in range(50
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摘要：class BaseRequestHandler: """Base class for request handler classes. This class is instantiated for each request to be handled. The constructor sets t
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摘要：http://www.cnblogs.com/alex3714/articles/5830365.html
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摘要：import hashlibimport socket ,os,timeserver = socket.socket()server.bind(('0.0.0.0',9999) )server.listen()while True: conn, addr = server.accept() prin
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摘要：import hashlibm = hashlib.md5()m.update(b"test")m.update(b"abc")print(m.hexdigest())m2 = hashlib.md5()m2.update(b"testabc")print(m2.hexdigest())
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摘要：import socketclient = socket.socket()#client.connect(('192.168.16.200',9999))client.connect(('localhost',9999))while True: cmd = input(">>:").strip()
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摘要：静态方法 与类无关，不能访问类里的任何属性和方法类方法 只能访问类变量属性@property 把一个方法变成一个静态属性， flight.status @status.setter flight.status = 3 @status.delter反射 getattr(obj,str) setattr
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摘要：import importlib __import__('import_lib.metaclass') #这是解释器自己内部用的，到lib层#importlib.import_module('import_lib.metaclass') #与上面这句效果一样，官方建议用这个，到metaclass子层
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摘要：#客户端import socketclient = socket.socket() #声明socket类型，同时生成socket连接对象client.connect(('localhost',6969))while True: msg = input(">>:").strip() if len(ms
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摘要：class AlexError(Exception): def __init__(self, msg): self.message = msg # def __str__(self): # return 'sdfsf'try: raise AlexError('数据库连不上')except Alex
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摘要：http://www.cnblogs.com/wupeiqi/articles/5017742.html python中的异常种类非常多，每个异常专门用于处理某一项异常！！！ try: # 主代码块 passexcept KeyError,e: # 异常时，执行该块 passelse: # 主代码块
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摘要：def bulk(self): print("%s is yelling...." %self.name)class Dog(object): def __init__(self,name): self.name = name def eat(self,food): print("%s is eat
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摘要：class MyType(type): def __init__(self, what, bases=None, dict=None): print("--MyType init ") super(MyType, self).__init__(what, bases, dict) def __cal
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摘要：# class Foo(object):# def __init__(self, name):# self.name = name### f = Foo("alex")# print(type(f))# print(type(Foo))def func(self): print('hello %s'
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摘要：__setitem__ name alex__delitem__ sdfdsf
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摘要：ChenRonghua is eating ddChenRonghua is talking http://www.cnblogs.com/alex3714/articles/5213184.html
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摘要：info of Teacher : lian name:lian age: 33 sex: M salary: 20000 course: Linux info of Student : ChenRonghua name:ChenRonghua age: 22 sex: M stu_id: 2018
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摘要：lian born with 10000 moneylian is eattinglian is piao lian is sleepingman is sleepingChenRonghua is born a babylian is making friends with ChenRonghua
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摘要：常用正则表达式符号 '.' 默认匹配除\n之外的任意一个字符，若指定flag DOTALL,则匹配任意字符，包括换行'^' 匹配字符开头，若指定flags MULTILINE,这种也可以匹配上(r"^a","\nabc\neee",flags=re.MULTILINE)'$' 匹配字符结尾，或e.
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摘要：用于加密相关的操作，3.x里代替了md5模块和sha模块，主要提供 SHA1, SHA224, SHA256, SHA384, SHA512 ，MD5 算法
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摘要：用于生成和修改常见配置文档，当前模块的名称在 python 3.x 版本中变更为 configparser。 来看一个好多软件的常见文档格式如下
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摘要：<?xml version="1.0"?><data> <country name="Liechtenstein"> <rank updated="yes">2</rank> <year>2008</year> <gdppc>141100</gdppc> <neighbor name="Austri
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摘要：shelve模块是一个简单的k,v将内存数据通过文件持久化的模块，可以持久化任何pickle可支持的python数据格式import shelveimport datetimed = shelve.open('shelve_test') # 打开一个文件print(d.get("name"))pri
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摘要：#!/usr/bin/env pythonimport shutilf1 = open('本节笔记','r',encoding='utf-8')f2 = open('笔记2','w')shutil.copyfileobj(f1,f2)shutil.copyfile('本节笔记','笔记3')#shu
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摘要：sys.argv 命令行参数List，第一个元素是程序本身路径sys.exit(n) 退出程序，正常退出时exit(0)sys.version 获取Python解释程序的版本信息sys.maxint 最大的Int值sys.path 返回模块的搜索路径，初始化时使用PYTHONPATH环境变量的值sy
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摘要：F:\python\s14\dya5\timeNoneNonec:\NoneF:\python\s14\dya5\time...NoneNoneNoneNone['os1.py', 'random1.py', 'time1.py']\ ;environ({'ALLUSERSPROFILE': 'C:
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摘要：在Python中，通常有这几种方式来表示时间：1）时间戳 2）格式化的时间字符串 3）元组（struct_time）共九个元素。由于Python的time模块实现主要调用C库，所以各个平台可能有所不同。 UTC（Coordinated Universal Time，世界协调时）亦即格林威治天文时间，
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摘要：#!/usr/bin/env python#_*_encoding: utf-8_*_import randomprint (random.random()) #0.6445010863311293 #random.random()用于生成一个0到1的随机符点数: 0 <= n < 1.0print
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摘要：os.getcwd() 获取当前工作目录，即当前python脚本工作的目录路径os.chdir("dirname") 改变当前脚本工作目录；相当于shell下cdos.curdir 返回当前目录: ('.')os.pardir 获取当前目录的父目录字符串名：('..')os.makedirs('di
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摘要：#!/usr/bin/env pythonimport randomprint(random.random())print(random.randint(1,3))#0-3print(random.randrange(3))#0-2print(random.choice('abcdef'))#pri
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摘要：1541851708.6755588-28800None 123time.struct_time(tm_year=2018, tm_mon=11, tm_mday=10, tm_hour=10, tm_min=8, tm_sec=29, tm_wday=5, tm_yday=314, tm_isds
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摘要：#!/usr/bin/env pythonprint('welcome to my atm')print(__file__)#相对路径import osimport sysprint(os.path.abspath(__file__))#绝对路径print(os.path.dirname(os.path.abspath(__file__)))#上级目录print(os.path.dirname(o...
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摘要：#!/usr/bin/env python#import json#不同语言交互,只能存简单的字符，集合等，不能存函数'''info = { 'name':'lian', 'age':22,}''''''f = open("test.test",'w')f.write(str(info))f.clo
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摘要：TrueFalse<class 'str'> ["[1, 2, '\\u5f00\\u5916\\u6302\\u5f00\\u5916\\u6302']"]0b100111111011Falseb'Abcde' b'abcde'97bytearray(b'adcde')FalseW11901234
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摘要：内置参数详解 https://docs.python.org/3/library/functions.html?highlight=built#ascii
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摘要：A 准备吃包子啦!B 准备吃包子啦!老子开始准备做包子啦!做了1个包子,分两半!包子[0]来了,被[A]吃了!包子[0]来了,被[B]吃了!做了1个包子,分两半!包子[1]来了,被[A]吃了!包子[1]来了,被[B]吃了!做了1个包子,分两半!包子[2]来了,被[A]吃了!包子[2]来了,被[B]吃
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摘要：g: 1g: 1g: 2g: 3g: 5g: 8Generator return value: done start loop
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摘要：welcome to index pageUsername:lianPassword:abc123User has passed authenticationwelcome to home page welcomeldap++++++
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摘要：import timeuser,passwd = 'lian','abc123'def auth(func): def wrapper(*args,**kwargs): username = input("Username:").strip() password = input("Password:
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摘要：import timedef timer(func): def deco(*args,**kwargs): start_time=time.time() func(*args,**kwargs) stop_time=time.time() print('the func run time is %s
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摘要：变量可以指向函数，函数的参数能接收变量，那么一个函数就可以接收另一个函数作为参数，这种函数就称之为高阶函数。 1 2 3 4 5 6 def add(x,y,f): return f(x) + f(y) res = add(3,-6,abs) print(res) 1 2 3 4 5 6 def a
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摘要：在函数内部，可以调用其他函数。如果一个函数在内部调用自身本身，这个函数就是递归函数。 1 2 3 4 5 6 7 8 9 10 11 12 13 def calc(n): print(n) if int(n/2) ==0: return n return calc(int(n/2)) calc(10
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摘要：before change lian Oldboy edu.after change Lian YunNan Universitylian YunNan University
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摘要：(1, 2, 3, 4, 5, 5)(1, 2, 4, 5, 5)1(2, 3, 4, 5, 6){'name': 'lian', 'age': 8, 'sex': 'f'}lian8{'name': 'lian', 'age': 8}lian8Lian{'age': 18, 'sex': 'm'}
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摘要：in the test1in the test2in the test3None0(1, 'hello', ['alex', 'wupeiqi'], {'name': 'alex'})
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摘要：import timedef logger(): time_format = '%Y-%m-%d %X' time_current = time.strftime(time_format) with open('a.txt','a+') as f: f.write('%s end action\n'
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摘要：详细文章: http://www.cnblogs.com/yuanchenqi/articles/5956943.html http://www.diveintopython3.net/strings.html 需知: 1.在python2默认编码是ASCII, python3里默认是unicode
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摘要：为了避免打开文件后忘记关闭，可以通过管理上下文，即： 1 2 3 with open('log','r') as f: ... 1 2 3 with open('log','r') as f: ... 1 2 3 with open('log','r') as f: ... 1 2 3 with o
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摘要：#逐行读写f = open('yesterday','r',encoding='utf-8')f_new = open('yesterday3','w',encoding="utf-8")for line in f: if '等我享受' in line: line = line.replace('等
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摘要：#!/usr/bin/env python#data = open("yesterday",encoding="utf-8").read()f = open("yesterday",'r',encoding="utf-8")#文件句柄,参数w为创建一个文件，#参数r为读，参数a为追加，可写#参数r+
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摘要：#!/usr/bin/env pythonimport sys,timefor i in range(50): sys.stdout.write('#') sys.stdout.flush() time.sleep(0.1)
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摘要：{1, 3, 4, 5, 6, 7, 9} {0, 2, 66, 4, 6, 8, 22}{4, 6}{4, 6}{0, 1, 2, 3, 4, 5, 6, 7, 66, 9, 8, 22}{0, 1, 2, 3, 4, 5, 6, 7, 66, 9, 8, 22}{1, 3, 5, 7, 9}{1
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摘要：#!/usr/bin/env pythondata = { '北京':{ "昌平":{ "沙河":["oldboy","test"], "天通苑":["链家地产","我爱我家"] }, "朝阳":{ "望京":["奔驰","陌陌"], "国贸":{"CICC","HP"}, "东直门"
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摘要：#!/usr/bin/env pythoninfo = { 'stu1101': "TengLan Wu", 'stu1102': "LongZe Luola", 'stu1103': "XiaoZe Maliya",}print(info)print(info['stu1101'])info['s
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摘要：My name is {name} and my age is {year}5 my name is {name} and my age is {year} Falsemy name is {name} and my age is {year}3my name is lian and my age
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摘要：#!/usr/bin/env pythonproduct_list = [ ('Iphone',5800), ('Mac Pro',9800), ('Bike',800), ('Watch',10600), ('Coffee',31), ('Alex Python',120),]shopping_l
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摘要：元组其实跟列表差不多，也是存一组数，只不是它一旦创建，便不能再修改，所以又叫只读列表 语法 1 names = ("alex","jack","eric") 1 names = ("alex","jack","eric") 1 names = ("alex","jack","eric") 1 nam
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摘要：['alex', ['saving', 50]]['fengjie', ['saving', 50]]
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摘要：我爱北京b'\xe6\x88\x91\xe7\x88\xb1\xe5\x8c\x97\xe4\xba\xac'我爱北京
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摘要：1 result = 值1 if 条件 else 值2 1 result = 值1 if 条件 else 值2 1 result = 值1 if 条件 else 值2 1 result = 值1 if 条件 else 值2 result = 值1 if 条件 else 值2 如果条件为真：resul
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摘要：#!/usr/bin/env pythonimport sysprint(sys.path)#打印环境变量print(sys.argv)#打印['F:/python/s14/day2/sys.py']及输入参数import oscmd_res = os.system("dir")#调用系统命令,直接
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摘要：info1=''' info of %s age:%djob:%s''' %( name,int(age),job)print(info1) info2=''' info of {_name} age:{_age}job:{_job}'''.format( _name=name, _age=age,
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摘要：有一种循环叫死循环，一经触发，就运行个天荒地老、海枯石烂。 海枯石烂代码 1 2 3 4 5 count = 0 while True: print("你是风儿我是沙,缠缠绵绵到天涯...",count) count +=1 1 2 3 4 5 count = 0 while True: print
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摘要：最简单的循环10次 1 2 3 4 5 6 #_*_coding:utf-8_*_ __author__ = 'Alex Li' for i in range(10): print("loop:", i ) 1 2 3 4 5 6 #_*_coding:utf-8_*_ __author__ = '
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摘要：1 2 3 4 5 6 7 #!/usr/bin/env python #_*_coding:utf-8_*_ #name = raw_input("What is your name?") #only on python 2.x name = input("What is your name?")
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摘要：python解释器在加载 .py 文件中的代码时，会对内容进行编码（默认ascill） ASCII（American Standard Code for Information Interchange，美国标准信息交换代码）是基于拉丁字母的一套电脑编码系统，主要用于显示现代英语和其他西欧语言，其最多
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摘要：Variables are used to store information to be referenced and manipulated in a computer program. They also provide a way of labeling data with a descri
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摘要：windows 1 2 3 4 5 6 7 1、下载安装包 https://www.python.org/downloads/ 2、安装 默认安装路径：C:\python37 3、配置环境变量 【右键计算机】--》【属性】--》【高级系统设置】--》【高级】--》【环境变量】--》【在第二个内容框中
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摘要：In summary : Python 2.x is legacy, Python 3.x is the present and future of the language Python 3.0 was released in 2008. The final 2.x version 2.7 rel
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摘要：当我们编写Python代码时，我们得到的是一个包含Python代码的以.py为扩展名的文本文件。要运行代码，就需要Python解释器去执行.py文件。 由于整个Python语言从规范到解释器都是开源的，所以理论上，只要水平够高，任何人都可以编写Python解释器来执行Python代码（当然难度很大）
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