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Python 2 assumes different source code encodings

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问题 I noticed that without source code encoding declaration, the Python 2 interpreter assumes the source code is encoded in ASCII with scripts and standard input : $ python test.py # where test.py holds the line: print u'é' File "test.py", line 1 SyntaxError: Non-ASCII character '\xc3' in file test.py on line 1, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details $ echo "print u'é'" | python File "/dev/fd/63", line 1 SyntaxError: Non-ASCII character '\xc3' in file /dev

Character set that is not a superset of ASCII

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问题 Is there a character set other than EBCDIC that is not a superset of 7-bit ASCII? 回答1: Yes. JIS X 0208 is not a superset of ASCII. Some versions of this standard include most of the ASCII characters, but not all of them. A related fact is that a file encoded with UTF-16 or UTF-32 is not byte-equivalent to an ASCII file of the same characters, but since those are not character sets, and since Unicode is certainly a superset of ASCII, they do not qualify as answers to your question. 回答2: There

Character set that is not a superset of ASCII

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Convert Mainframe Binary to Ascii Using any Open Source Code or Tool

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问题 How can I convert a mainframe binary file (EBCDIC) having cobol copybook as record layout information to ASCII file by keeping in mind regarding the packed and zoned decimal format using any Java API or Open source tool? 回答1: Reading in Java If you want to Read Mainframe Cobol Files in java, have a look at JRecord - You will have to specify the charset (font). For US EBCDIC use CP037. Legstar - Have variety of Mainframe - Cobol Tools CB2java - Has not been updated in a while (not supported

How to convert a Java String to an ASCII byte array?

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问题 How to convert a Java String to an ASCII byte array? 回答1: Using the getBytes method, giving it the appropriate Charset (or Charset name). Example: String s = "Hello, there."; byte[] b = s.getBytes(StandardCharsets.US_ASCII); (Before Java 7: byte[] b = s.getBytes("US-ASCII"); ) 回答2: If you are a guava user there is a handy Charsets class: String s = "Hello, world!"; byte[] b = s.getBytes(Charsets.US_ASCII); Apart from not hard-coding arbitrary charset name in your source code it has a much

How do I distinguish between 'binary' and 'text' files?

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问题 Informally, most of us understand that there are 'binary' files (object files, images, movies, executables, proprietary document formats, etc) and 'text' files (source code, XML files, HTML files, email, etc). In general, you need to know the contents of a file to be able to do anything useful with it, and form that point of view if the encoding is 'binary' or 'text', it doesn't really matter. And of course files just store bytes of data so they are all 'binary' and 'text' doesn't mean

Getting The ASCII Value of a character in a C# string

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问题 Consider the string: string str="A C# string"; What would be most efficient way to printout the ASCII value of each character in str using C#. 回答1: Here's an alternative since you don't like the cast to int: foreach(byte b in System.Text.Encoding.UTF8.GetBytes(str.ToCharArray())) Console.Write(b.ToString()); 回答2: Just cast each character to an int: for (int i = 0; i < str.length; i++) Console.Write(((int)str[i]).ToString()); 回答3: This example might help you. by using simple casting you can

Python入妖3-----Urllib库的基本使用

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什么是Urllib Urllib是python内置的HTTP请求库包括以下模块 urllib.request 请求模块 urllib.error 异常处理模块 urllib.parse url解析模块 urllib.robotparser robots.txt解析模块 urlopen 关于urllib.request.urlopen参数的介绍： urllib.request.urlopen(url, data=None, [timeout, ]*, cafile=None, capath=None, cadefault=False, context=None) url参数的使用先写一个简单的例子： import urllib.request ''''' Urllib 模块提供了读取web页面数据的接口，我们可以像读取本地文件一样读取www和ftp上的数据 urlopen 方法用来打开一个url read方法用于读取Url上的数据 ''' response = urllib.request.urlopen('http://www.baidu.com') print(response.read().decode('utf-8')) urlopen一般常用的有三个参数，它的参数如下： urllib.requeset.urlopen(url,data,timeout)

How do I remove extended ASCII characters from a string in T-SQL?

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问题 I need to filter out (remove) extended ASCII characters from a SELECT statement in T-SQL. I'm using a stored procedure to do so. Expected input: ËËËËeeeeËËËË Expected output: eeee All that I've found is for MySQL. I'm using : Microsoft SQL Server Management Studio 11.0.2100.60 Microsoft .NET Framework 4.0.30319.17929 回答1: OK, give this a try. It seems the same issue they have. Anyway you need to modify it based on your requirements. CREATE FUNCTION RemoveNonASCII ( @nstring nvarchar(255) )

Python基础第十天---对象持久化与字符串处理机制

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文章目录一、对象持久化对象持久化必要性使用格式化文本文件 1文本文件操作内置函数eval，它可以将读到的字符串转换为Python的表达式，此时可以将他当作Python语句来运行了。 2使用常见的pickle进行对象持久化序列化到字符串中，再反序列化为原来类型序列化到二进制文件中，再反序列化为原来类型 3使用常见的shelve进行对象持久化二、字符串的本质字符串类型分类三种类型的转换 bytes字节类型 bytearray字节数组类型，支持原位改变，类似列表类型概述三、UTF-8、ASCII常用字符串编码 ASCII 0-127代码点之间 latin-1为拉丁1字符码 UTF-16 UTF-32 通用可变字长UTF-8，通用性好。四、字符的编码与解码编码解码字符串默认编码解码文件读取的编码与解码字符串BOM处理（字节顺序标记）一、对象持久化对象持久化必要性概论：所有程序运行过程，就是使用我们编写的指令，来调度运算我们特定的数据或数据结构，但这个运算过程在内存里边；我们知道内存不是永久性存储，当我们断电，内存中的状态或数据就会丢失，当然在实际计算可能需要将当前需要计算的某个数据结果永久存储起来，就要用到对象的持久化。如：玩游戏过关时，这个状态是在内存中表现的，若想明天接着玩，我们可以把当前进度保存一下