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1. Variable naming rules 1. Variable names can only be any combination of letters, numbers, and underscores 2. Variable names cannot start with numbers 3. Some reserved fields cannot be used as custom variable names 4. Variable names need to have a clear meaning. For example, a variable that saves a name is best defined as a variable name such as name. 2. Character encoding The function of character encoding is to convert input characters into machine codes. ASCII code is the earliest character encoding in the world. The earliest character encoding in China is GB2312, which contains more than 7,000 Chinese characters and symbols. After the first expansion, more than 20,000 Chinese characters were included. The character encoding is GBK1.0. The second After this expansion, a total of more than 27,000 Chinese characters were included, and the character encoding is GB18030. In order to unify character encoding internationally, Unicode character encoding was introduced because this encoding requires more storage space than the original ASCII encoding when storing English. Later, After compression optimization, UTF-8 character encoding was introduced. This encoding is still one character per byte when storing English, and three bytes when storing a Chinese character. 3. Python user interactive program Python has a variety of interactive programs, which can also be called interpreters. The most commonly used interactive program is CPython
1. Detailed explanation of python basic knowledge
Introduction: python has a variety of interactive programs, which can also be called interpreters. The most commonly used interactive program is CPython, and the fastest code running speed is PyPy.
2. Summary of learning python basic knowledge string
Introduction: This article introduces a summary of the basic knowledge of strings in learning python
3. Basic knowledge of Python functions
#Introduction: This article starts from the internal functions provided by the system, the function library provided by the third party + the simple crawling out of the code and the process of installing the httplib2 module and user customization The function is described in three aspects. Has very good reference value. Let’s take a look with the editor below
4. Collection of summary of basic python knowledge
Introduction: This article I will give you a summary of the basic knowledge of collections in Python. It is very simple and easy to understand. Friends who need it can refer to it.
5. Python basic introductory study notes (Python environment construction)
Introduction: This article mainly introduces the basic introductory study notes of python. This is the first article to start learning the basic knowledge of python. Only by consolidating the Python basics can you go further. Interested friends can Please refer to
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