How to use Python basics Spyder

What is Spyder

Spyder is an integrated development environment (IDE) for scientific computing using the Python programming language.
It combines the advanced editing, analysis, and debugging functions of comprehensive development tools with the visualization functions of data exploration, interactive execution, in-depth inspection, and scientific packages, bringing great convenience to users.

Open Spyder

In the start menu, find Anaconda3-Spyder and click to enter; you can also send "Spyder" to the desktop shortcut, and then click the "Spyder" icon on the desktop Enter

Modify the display theme

After entering Spyder, the page is as shown in the picture

Although the program Members generally prefer black backgrounds (I don’t know why, maybe it looks more classy), but we can also choose the background we like.

We can click Tools-Preference-Appearance, select the display theme we like, click on different themes and then click the preview button on the right to see the renderings.

After selecting the display theme, click Apply. The system prompts that Spyder needs to be restarted. Click Yes.

Modify language

We can click Tools-Preference-Application-Advanced settings, select "Simplified Chinese" and click "Apply" to switch to Chinese.

The core building blocks of Spyder

What we use most often is thecode editing area and variable browsing These three windows are the server and IPython console.

• Code editing area: By default, it is located on the left side of the Spyder interface. It is mainly used for writing code files.

• Variable Browser: By default, it is located in the upper right corner of the Spyder interface. As long as it is a structural variable in Python memory, such as a data frame, list, dictionary, etc., it can be displayed here, each line Displays information about a variable, including variable name, variable type, variable length, and variable value. Double-click the corresponding variable row to view all the data in the variable by popping up a new window.

• IPython console: Located in the lower right corner of the Spyder interface by default, it is the core execution unit of Spyder and performs file-based programming and interactive programming. The most important function is to interact with users, who can quickly verify whether the code running results are as expected.

Basic operations in the code editing area

File operations

Common file operations mainly include new, open, and save

(1 ) New

Click "File" - "New File" in the menu bar, and a new file named "Unnamed 0.py" is created. We write print('Hello, world'), then we have compiled our first program.

(2) Save

After the program is compiled, we can click "File"-"Save" in the menu bar ", you can save the file

# You can choose to save the folder and rename the file, for example, name it "First python file".

(3) Open

We click "File"-"Open" in the menu bar to open the file

Run operation

After we edit the code in the code editing area, click the shortcut key of "Run File" to run it.

Basic operations of IPython console

Perform file-based programming

After we edit the code in the code editing area, click "Run File " shortcut key to run, and the running results are displayed in the Ipython console.

Execute interactive programming

We can also edit the code directly in the Ipython console. After editing is completed, enter the "Enter" key to run.

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