What symbol does a python comment start with?

There are many kinds of comments in python, including single-line comments, multi-line comments, batch comments, and Chinese comments are also commonly used. Python annotations also have their own specifications, which will be introduced in the article. Comments can serve as notes. When working in a team, code written by individuals is often called by multiple people. In order to make it easier for others to understand the flow of the code, using comments is very effective.

1. python single-line comment symbol (#) (recommended learning: Python video tutorial)

The pound sign (#) is often used as a single-line comment symbol. When # is used in code, any data to the right of it will be ignored and treated as a comment. The content to the right of

print 1 #输出1

# will not be output during execution.

2. Batch and multi-line comment symbols

In python, there will also be comments with many lines. In this case, batch multi-line comment symbols are needed. . Multi-line comments are enclosed in triple quotes ''' ''', for example:

Some people may say that this is not confused with multi-line strings. But I see many programmers using it this way, so just pay attention to the distinction when using it.

3. python Chinese comment method

When writing code in python, it is inevitable that Chinese will appear or be used. At this time, you need to add at the beginning of the file Chinese annotation. For example, create a python list and comment its purpose on the code. If you do not declare the format for saving the encoding at the beginning, then it will use ASKII code to save the file by default. At this time, if there is Chinese in your code, an error will occur. Even if your Chinese is included in the comments. So it is important to add Chinese comments.

#coding=utf-8

Or:

#coding=gbk

Tip: Both of the above can represent Chinese comments. I have seen more people using urf-8.

A good programmer must comment on the code. But make sure that the comments are all important. You can tell what it does at a glance. Useless code does not need to be commented.

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