absrtact : When writing Python scripts, if we use Python to process Web page data or work with Chinese characters, this error message often occurs: syntaxerror:non-ascii character ' \ Xe6 ' in file./filename.py of Line 3, but no encoding declared. This article focuses on issues related to Unicode and Chinese, and special character encoding in Python. What rules should be followed for character encoding and decoding.
Objective:
If the password domain
Http://www.cnblogs.com/cy163/archive/2007/05/31/766886.htmlUnicode,gbk,utf-8 differencesIn simple terms, UNICODE,GBK and five yards are encoded values, and utf-8,uft-16 is the expression of this value. And the preceding three kinds of coding is a compatible, the same Chinese character, that three code value is completely different. such as "Han" Uncode value and GBK is not the same, assuming that Uncode is A040,GBK for b030, and Uft-8 code, that is, t
In the front-end development, in order to make Chinese in different environments can be very good display, is generally translated into Unicode format, that is, u4f60, such as: "Hello," The Unicode code for "u4f60u597du554a."
JS to convert Chinese to Unicode encoding is very simple.
JS Code:function Convert2unicode (str) {Return Str.replace (/[u0080-uffff]/g,Fu
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The biggest advantage of Unicode is that there is only one character set. In other words, a program using Unicode character encoding can be compiled in any country's compiling environment without being considered garbled, it can also display characters normally in the editing environment of any language, rather than garbled characters. Does
Introduction
If you live in Eastern Europe, Japan or the Middle East, and you write computer programs, you are probably familiar with Unicode. if you are writing programs in Visual C ++/MFC, then you probably have experienced some of the problems with trying to write code that runs under Unicode and ASCII. this article shocould help clear up some of the confusion. the principles here will work for any
The first thing to figure out is that in Python, string object and Unicode object are two different types.String object is a sequence consisting of characters, and Unicode object is a sequence of Unicode code units.Character in string are encoded in a variety of ways, such as Single-byte ASCII, Double-byte GB2312, and so on, such as UTF-8. Obviously to interpret
Brief introduction
If you are writing programs that target non-English-speaking users, such as China, Japan, Eastern Europe, and the Middle East, then you must be familiar with the UNICODE character set. Especially if you are writing a program for users in these countries and regions with Visual C++/MFC, if you want your application to have a wider audience, you must consider code UNICODE compatibility, wh
Character encoding notes: ASCII, Unicode and UTF-8
I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online.
As a result, this problem is more complicated than I thought. After lunch, we can see that the problem is fixed at AM.
Below are my notes, mainly used to sort out my own ideas. However, I try to make it easy to understand and hope it can b
At noon today, I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online.
As a result, this problem is more complicated than I thought. After lunch, we can see that the problem is fixed at AM.
Below are my notes, mainly used to sort out my own ideas. However, I try to make it easy to understand and hope it can be useful to other friends. After all, character encoding is the cornerstone of comp
The representation of a string inside Python is Unicode encoding, so in encoding conversion, it is usually necessary to use Unicode as the intermediate encoding, that is, decoding the other encoded string (decode) into Unicode first. From Unicode encoding (encode) to another encoding.The default encoding of the string
Today, using Unicode as a string is a common sense, but it's still a headache for some programming languages with a long history. Without the support of a third-party library, C + + does not actually support Unicode effectively, even if it is UTF8. (Note: This article discusses the encoding scheme of strings in memory, not file or network traffic.) )When the STL's string template is born,
Unicode strings can be encoded in a number of ways as normal strings, according to the encoding you choose (encoding):Toggle Line Numbers1#将Unicode转换成普通的Python字符串:"encoding (encode)" 2unicodestring = u"Hello World" 3utf8string = Unicodestring.encode ("Utf-8") 4asciistring = Unicodestring.encode ("ASCII") 5isostring = Unicodestring.encode ("iso-8859-1") 6utf16string = Unicodestring.encode ("utf-16"
1. How to obtain the number of characters in a string that contains both single-byte and double-byte characters?
You can call the Runtime Library of Microsoft Visual C ++ to contain the function _ mbslen to operate multi-byte strings (including single-byte and dual-byte strings.Calling the strlen function does not really know how many characters are in the string. It only tells you how many bytes are before the end of 0.
2. How to operate on DBCS strings?
Function DescriptionPtstr charnext (lpct
At noon today, I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online.
As a result, this problem is more complicated than I thought. After lunch, we can see that the problem is fixed at AM.
Below are my notes, mainly used to sort out my own ideas. However, I try to make it easy to understand and hope it can be useful to other friends. After all, character encoding is the cornerstone of comp
Unicode: Wide-Byte Character Set1. How to obtain the number of characters in a string that contains both single-byte and double-byte characters?You can call the Runtime Library of Microsoft Visual C ++ to contain the function _ mbslen to operate multi-byte strings (including single-byte and dual-byte strings.Calling the strlen function does not really know how many characters are in the string. It only tells you how many bytes are before the end of 0.
A very practical articleArticleFor character encoding, reprinted as a favorites.
-=== Reference original content ===-Author: Ruan YifengLink: http://www.ruanyifeng.com/blog/2007/10/ascii_unicode_and_utf-8.html
At noon today, I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online.As a result, this problem is more complicated than I thought. After lunch, we can see that the problem is fix
>
Unicode is commonly used in the UCS-2, it uses two bytes to encode a character, such as the Chinese character "warp" encoding is 0X7ECF, 0X7ECF converted to decimal is 32463,ucs-2 with two bytes to encode characters, 2 16 is equal to 65536, so ucs- 2 can encode a maximum of 65,536 characters. Encoding from 0 to 127 characters like ASCII-encoded characters, such as the letter "a" Unicode encoding is 0x006
theoretically represent a maximum of 256x256 = 65536 characters.
The issue of Chinese encoding needs to be discussed in a specific article. This note does not cover this issue. It is only pointed out that although multiple bytes are used to represent a symbol, the Chinese character encoding of the GB class has nothing to do with the Unicode and UTF-8 of the subsequent text.
3. Unicode
As mentioned in the p
Character-coded notes: Ascii,unicode and UTF-8Today at noon, I suddenly want to understand the relationship between Unicode and UTF-8, so I began to search the Internet information.As a result, the problem was more complicated than I thought, and it was only after lunch that I saw 9 o'clock at night.Here is my notes, mainly used to organize their own ideas. But I try to be easy to write and I hope to be use
NanyiDate: October 28, 2007Today at noon, I suddenly want to understand the relationship between Unicode and UTF-8, so I began to search the Internet information.As a result, the problem was more complicated than I thought, and it was only after lunch that I saw 9 o'clock at night.Here is my notes, mainly used to organize their own ideas. But I try to be easy to write and I hope to be useful to other friends. After all, character coding is the corners
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