python bag of words bag of words
matlab怎么组件bag of words
题目没写错吗？A-D都不对啊？我猜原题是“In the bag he found a piece of paper on which some special words were written”之类的吧，答案是B，是由“write some special words on a piece of paper”转换而来的……因为不能把句子里的“on”去掉，所以A是错的……
Python练习题
首先 range是reversed word 在这里你可以理解为python保留词汇 也就是说你给一个变量赋值时 不能命名其为range 因为你下载的python里已经有了range的用法和相关操作规则 wiki中的定义为a reserved word (also known as a reserved identifier) is a word that cannot be used as an identifier, such as the name of a variable, function, or label （也就是前面我所解释的 当然 wiki更权威 相信你也能读懂 ）其他的reserved word 可以随便举例 比如 random in for print 等等 都可以
求python大神帮我做下面几道题2...
def Q_2(): n = input(＂Enter n:＂) term = input(＂Enter number of terms to sum: ＂) s = 0 for i in range(term): s += n/(2.0*i+1) print s def Q_3(): name = input(＂Enter a file name:＂) f = open(name,"r") lines = 0 char = 0 words = 0 for line in f: line = line.strip().split() lines += 1 for word in line: words += 1 chars +=len(word) f.close() print lines print words print chars def Q_4(): n = input(＂Enter length in inch: ＂) print n,＂inches = ＂,n * 2.54,＂cm＂ def Q_7(): name = input(＂Enter a file name:＂) f = open(name,"r") w = open(＂anotherFile.txt＂,"w") for line in f: line = line.strip().split() name = line[0][:-1] score = int(line[1]) if score >= 90: g = ＂A＂ elif score >=80: g = ＂B＂ elif score >=70: g = ＂C＂ elif score >=60: g = ＂D＂ else: g = ＂F＂ w.write(name+＂:＂,g) w.write(＂\n＂) f.close() w.close（) 写了半天，多给点分吧
谚语 Don"t let the cat out of the bag 中文意思
不要泄露秘密、“to let the cat out of the bag”，它的意思是“揭露一个秘密”，尤其是很重要、关键的那种。
关于这个词组的记载可以追溯到1760年，但据说此前一两百年就有这种说法了。
早在超市（或杂货店）出现之前，人们通常在当地的市场买菜。
农民和商人们在那里叫卖蔬菜水果、鸡蛋面包之类，此外还会出售肉类和家禽，通常都是些活的动物。
在一些特殊的场合（如节日盛宴），乳猪是采购单上一样很抢手的食物。
由于乳猪会乱动，当顾客挑选好并结账后，商人为了运送方便就把猪塞进一个帆布口袋（poke）里递给顾客。
然而，市场上的许多交易并不光明磊落，奸商有时会利用顾客一时走神，把一只流浪猫冒充乳猪放进袋子里。
直到顾客回家，“把猫从袋子里拿出来”（let the cat out of the bag），才发现这个骗局。
所以这个词组意味着是一个意外的，但通常令人讨厌的发现。
据说这也是谚语“不要买装在袋子里的猪”（don"t buy a pig in a poke）的由来，也就是“不要不看现货就买东西”的意思。
而the World Wide Words website的经营者Michael Quinion对这个故事表示怀疑，他指出猫在袋子里会变得极度狂躁，因此很难把它误当成一头小猪。
也许这个词组是来自于某个人的经历，由于某种原因有一只猫在他袋子里，而戏剧性的效果则使这个故事广为流传。
【Writeaprogramwhichaskstheuserforfournumbers(Python)1)...
Cathedral for )] s;u"u"= Goose()>.turner.com/cnn/dam/assets/111017024308-occupy-london-st-paul-s-cathedral-story-top.jpg＂ target=＂_blank＂>http://i2; , u"赞"] ?hpt=ieu_c2"＂ target=＂_blank＂>http;>, who have been camped outside who have been camped outside >>Goose>>> url s = to 赞"# [（u"这个"-- ， u"真心"。
它研究能实现人与计算机之间用自然语言进行有效通信的各种理论和方法。
自然语言处理是一门融语言学、计算机科学、数学于一体的科学；SnowNLP(u" article. = "court bid );# u"「繁体字」「繁体中文」的叫法# >真心"；protesters 。
自然语言处理并不是一般地研究自然语言，而在于研制能有效地实现自然语言通信的计算机系统，特别是其中的软件系统；the landmark St;u">>> from goose court bid ://edition;London London , u"东西"，# .cnn, .srcfrom avoi>.meta_description＂# 0.9769663402895832 positive的概率 snownlp import SnowNLP .extract(url=url)>>>);, u"Vg"import article,# (u"很") s.han the past four months lost their a decision made by London"，即人们日常使用的语言，所以它与语言学的研究有着密切的联系，但又有重要的区别；d".turner.com/cnn/dam/assets/111017024308-occupy-london-st-paul-s-cathedral-story-top.jpg2. python 。
因而它是计算机科学的一部分；s;zhe"u"自然语言处理是计算机科学领域与人工智能领域中的一个重要方向；" s = SnowNLP(text) s.keywords(3) # [u"语言"， u"自然"， u"计算机"] s.summary(3) # [u"因而它是计算机科学的一部分"，# u"自然语言处理是一门融语言学、计算机科学、# 数学于一体的科学"，# u"自然语言处理是计算机科学领域与人工智能# 领域中的一个重要方向"]s.sentences s = SnowNLP([[u"这篇"， u"文章"]，[u"那篇"， u"论文"]，[u"这个"]])s.tfs.idfs.sim([u"文章"])# [0.3756070762985226, 0, 0] 3. python TextTeaser #!/usr/bin/python # -*- coding: utf-8 -*- from textteaser import TextTeaser # article source: https://blogs.dropbox.com/developers/2015/03/limitations-of-the-get-method-in-http/ title = ＂Limitations of the GET method in HTTP＂ text = ＂We spend a lot of time thinking about web API design, and we learn a lot from other APIs and discussion with their authors. In the hopes that it helps others, we want to share some thoughts of our own. In this post, we"ll discuss the limitations of the HTTP GET method and what we decided to do about it in our own API. As a rule, HTTP GET requests should not modify server state. This rule is useful because it lets intermediaries infer something about the request just by looking at the HTTP method. For example, a browser doesn"t know exactly what a particular HTML form does, but if the form is submitted via HTTP GET, the browser knows it"s safe to automatically retry the submission if there"s a network error. For forms that use HTTP POST, it may not be safe to retry so the browser asks the user for confirmation first. HTTP-based APIs take advantage of this by using GET for API calls that don"t modify server state. So if an app makes an API call using GET and the network request fails, the app"s HTTP client library might decide to retry the request. The library doesn"t need to understand the specifics of the API call. The Dropbox API tries to use GET for calls that don"t modify server state, but unfortunately this isn"t always possible. GET requests don"t have a request body, so all parameters must appear in the URL or in a header. While the HTTP standard doesn"t define a limit for how long URLs or headers can be, most HTTP clients and servers have a practical limit somewhere between 2 kB and 8 kB. This is rarely a problem, but we ran up against this constraint when creating the /delta API call. Though it doesn"t modify server state, its parameters are sometimes too long to fit in the URL or an HTTP header. The problem is that, in HTTP, the property of modifying server state is coupled with the property of having a request body. We could have somehow contorted /delta to mesh better with the HTTP worldview, but there are other things to consider when designing an API, like performance, simplicity, and developer ergonomics. In the end, we decided the benefits of making /delta more HTTP-like weren"t worth the costs and just switched it to HTTP POST. HTTP was developed for a specific hierarchical document storage and retrieval use case, so it"s no surprise that it doesn"t fit every API perfectly. Maybe we shouldn"t let HTTP"s restrictions influence our API design too much. For example, independent of HTTP, we can have each API function define whether it modifies server state. Then, our server can accept GET requests for API functions that don"t modify server state and don"t have large para...