Code Runner For Python

Run code snippet or code file for multiple languages: C, C++, Java, JavaScript, PHP, Python, Perl, Perl 6, Ruby, Go, Lua, Groovy, PowerShell, BAT/CMD, BASH/SH, F# Script, F# (.NET Core), C# Script, C# (.NET Core), VBScript, TypeScript, CoffeeScript, Scala, Swift, Julia, Crystal, OCaml Script, R, AppleScript, Elixir, Visual Basic .NET, Clojure, Haxe, Objective-C, Rust, Racket, Scheme, AutoHotkey, AutoIt, Kotlin, Dart, Free Pascal, Haskell, Nim, D, Lisp, Kit, V, SCSS, Sass, CUDA, Less, Fortran, and custom command

When I select the option to run Code Runner in integrated terminal, it runs Python 2, but when using only Code Runner or Run in Terminal, it runs Python 3. Build, Run & Share Python code online using online-python's compiler for free. It's one of the quick, robust, powerful online compilers for python language. Don't worry about setting up python environment in your local. Now Run the python code in your favorite browser instantly. Getting started with this Python editor is easy and fast. Python Runner is a handy tool for learning Python or running Python script for daily tasks. Simply type Python code and press 'Command-R' to run it, that is all! You don't event need to save the file first!. Type and run Python code instantly. Display output as plain text or HTML. Python genpassword. Py 15 python genpassword. Py -no-digits 15 python genpassword. Py -no-digits -no-special-chars 15 Conclusion. In this article, you've gone through the implementation of python code examples as command line tools for everyday use. You've seen Argparse is very handy to implement several kinds of command line tools.

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Donation

If you like this extension, you could become a backer or sponsor via Patreon, donate via PayPal, or scan below QR code to donate via Alipay. Any amount is welcome. It will encourage me to make this extension better and better!

Features

Run code file of current active Text Editor
Run code file through context menu of file explorer
Run selected code snippet in Text Editor
Run code per Shebang
Run code per filename glob
Run custom command
Stop code running
View output in Output Window
Set default language to run
Select language to run
Support REPL by running code in Integrated Terminal

Usages

To run code:
- use shortcut Ctrl+Alt+N
- or press F1 and then select/type Run Code,
- or right click the Text Editor and then click Run Code in editor context menu
- or click Run Code button in editor title menu
- or click Run Code button in context menu of file explorer
To stop the running code:
- use shortcut Ctrl+Alt+M
- or press F1 and then select/type Stop Code Run
- or click Stop Code Run button in editor title menu
- or right click the Output Channel and then click Stop Code Run in context menu

To select language to run, use shortcut Ctrl+Alt+J, or press F1 and then select/type Run By Language, then type or select the language to run: e.g php, javascript, bat, shellscript...

To run custom command, then use shortcut Ctrl+Alt+K, or press F1 and then select/type Run Custom Command

Configuration

Make sure the executor PATH of each language is set in the environment variable.You could also add entry into code-runner.executorMap to set the executor PATH.e.g. To set the executor PATH for ruby, php and html:

Supported customized parameters

$workspaceRoot: The path of the folder opened in VS Code
$dir: The directory of the code file being run
$dirWithoutTrailingSlash: The directory of the code file being run without a trailing slash
$fullFileName: The full name of the code file being run
$fileName: The base name of the code file being run, that is the file without the directory
$fileNameWithoutExt: The base name of the code file being run without its extension
$driveLetter: The drive letter of the code file being run (Windows only)
$pythonPath: The path of Python interpreter (set by Python: Select Interpreter command)

Please take care of the back slash and the space in file path of the executor

Back slash: please use
If there ares spaces in file path, please use ' to surround your file path

You could set the executor per filename glob:

Besides, you could set the default language to run:

For the default language: It should be set with language id defined in VS Code. The languages you could set are java, c, cpp, javascript, php, python, perl, ruby, go, lua, groovy, powershell, bat, shellscript, fsharp, csharp, vbscript, typescript, coffeescript, swift, r, clojure, haxe, objective-c, rust, racket, ahk, autoit, kotlin, dart, pascal, haskell, nim, d, lisp

Also, you could set the executor per file extension:

To set the custom command to run:

To set the the working directory:

To set whether to clear previous output before each run (default is false):

To set whether to save all files before running (default is false):

To set whether to save the current file before running (default is false):

To set whether to show extra execution message like [Running] ... and [Done] ... (default is true):

[REPL support] To set whether to run code in Integrated Terminal (only support to run whole file in Integrated Terminal, neither untitled file nor code snippet) (default is false):

To set whether to preserve focus on code editor after code run is triggered (default is true, the code editor will keep focus; when it is false, Terminal or Output Channel will take focus):

code-runner.ignoreSelection: Whether to ignore selection to always run entire file. (Default is false)

code-runner.showRunIconInEditorTitleMenu: Whether to show 'Run Code' icon in editor title menu. (Default is true)

code-runner.showRunCommandInEditorContextMenu: Whether to show 'Run Code' command in editor context menu. (Default is true)

code-runner.showRunCommandInExplorerContextMenu: Whether to show 'Run Code' command in explorer context menu. (Default is true)

code-runner.showStopIconInEditorTitleMenu: Whether to show 'Stop Code Run' icon in editor title menu when code is running. (Default is true)

code-runner.terminalRoot: For Windows system, replaces the Windows style drive letter in the command with a Unix style root when using a custom shell as the terminal, like Bash or Cgywin. Example: Setting this to /mnt/ will replace C:path with /mnt/c/path (Default is ')

code-runner.temporaryFileName: Temporary file name used in running selected code snippet. When it is set as empty, the file name will be random. (Default is 'tempCodeRunnerFile')

code-runner.respectShebang: Whether to respect Shebang to run code. (Default is true)

About CWD Setting (current working directory)

By default, use the code-runner.cwd setting
If code-runner.cwd is not set and code-runner.fileDirectoryAsCwd is true, use the directory of the file to be executed
If code-runner.cwd is not set and code-runner.fileDirectoryAsCwd is false, use the path of root folder that is open in VS Code
If no folder is open, use the os temp folder

Note

For Objective-C, it is only supported on macOS
To run C# script, you need to install scriptcs
To run TypeScript, you need to install ts-node
To run Clojure, you need to install Leiningen and lein-exec

Telemetry data

By default, telemetry data collection is turned on to understand user behavior to improve this extension. To disable it, update the settings.json as below:

Change Log

See Change Log here

Code Runner For Python Free

Issues

Submit the issues if you find any bug or have any suggestion.

Contribution

Fork the repo and submit pull requests.

Your Python code can be up on a code editor, IDE or a file. And, it won’t work unless you know how to execute your Python script.

In this blog post, we will take a look at 7 ways to execute Python code and scripts. No matter what your operating system is, your Python environment or the location of your code – we will show you how to execute that piece of code!

Running Python Code Interactively
How are Python Script is Executed
How to Run Python Scripts
How to Run Python Scripts using Command Line
How to Run Python Code Interactively
Running Python Code from a Text Editor
Running Python Code from an IDE
How to Run Python Scripts from a File Manager
How to Run Python Scripts from Another Python Script

Where to run Python scripts and how?

You can run a Python script from:

OS Command line (also known as shell or Terminal)
Run Python scripts with a specific Python Version on Anaconda
Using a Crontab
Run a Python script using another Python script
Using FileManager
Using Python Interactive Mode
Using IDE or Code Editor

Running Python Code Interactively

To start an interactive session for Python code, simply open your Terminal or Command line and type in Python(or Python 3 depending on your Python version). And, as soon as you hit enter, you’ll be in the interactive mode.

Here’s how you enter interactive mode in Windows, Linux and MacOS.

Interactive Python Scripting Mode On Linux

Open up your Terminal.

It should look something like

Enter the Python script interactive mode after pressing “Enter”.

Interactive Python Scripting Mode On Mac OSX

Launching interactive Python script mode on Mac OS is pretty similar to Linux. The image below shows the interactive mode on Mac OS.

Interactive Python Scripting Mode On Windows

On Windows, go to your Command Prompt and write “python”. Once you hit enter you should see something like this:

Running Python Scripts Interactively

With interactive Python script mode, you can write code snippets and execute them to see if they give desired output or whether they fail.

Take an example of the for loop below.

Our code snippet was written to print everything including 0 and upto 5. So, what you see after print(i) is the output here.

To exit interactive Python script mode, write the following:

And, hit Enter. You should be back to the command line screen that you started with initially.

There are other ways to exit the interactive Python script mode too. With Linux you can simply to Ctrl + D and on Windows you need to press Ctrl + Z + Enter to exit.

Note that when you exit interactive mode, your Python scripts won’t be saved to a local file.

How are Python scripts executed?

A nice way to visualize what happens when you execute a Python script is by using the diagram below. The block represents a Python script (or function) we wrote, and each block within it, represents a line of code.

When you run this Python script, Python interpreter goes from top to bottom executing each line.

And, that’s how Python interpreter executes a Python script.

But that’s not it! There’s a lot more that happens.

Flow Chart of How Python Interpreter Runs Codes

Step 1: Your script or .py file is compiled and a binary format is generated. This new format is in either .pyc or .pyo.

Step 2: The binary file generated, is now read by the interpreter to execute instructions.

Think of them as a bunch of instructions that leads to the final outcome.

There are some benefits of inspecting bytecode. And, if you aim to turn yourself into a pro level Pythonista, you may want to learn and understand bytecode to write highly optimized Python scripts.

You can also use it to understand and guide your Python script’s design decisions. You can look at certain factors and understand why some functions/data structures are faster than others.

How to run Python scripts?

To run a Python script using command line, you need to first save your code as a local file.

Let’s take the case of our local Python file again. If you were to save it to a local .py file named python_script.py.

There are many ways to do that:

Create a Python script from command line and save it
Create a Python script using a text editor or IDE and save it

Saving a Python script from a code editor is pretty easy. Basically as simple as saving a text file.

But, to do it via Command line, there are a couple of steps involved.

First, head to your command line, and change your working directory to where you wish to save the Python script.

Once you are in the right directory, execute the following command in Terminal:

Once you hit enter, you’ll get into a command line interface that looks something like this:

Now, you can write a Python code here and easily run it using command line.

How to run Python scripts using command line?

Python scripts can be run using Python command over a command line interface. Make sure you specify the path to the script or have the same working directory. To execute your Python script(python_script.py) open command line and write python3 python_script.py

Replace python3 with python if your Python version is Python2.x.

Here’s what we saved in our python_script.py

And, the output on your command line looks something like this

Let’s say, we want to save the output of the Python code which is 0, 1, 2, 3, 4 – we use something called a pipe operator.

In our case, all we have to do is:

And, a file named “newfile.txt” would be created with our output saved in it.

How to run Python code interactively

There are more than 4 ways to run a Python script interactively. And, in the next few sections we will see all major ways to execute Python scripts.

Using Import to run your Python Scripts

Code Runner For Python Online

We all use import module to load scripts and libraries extremely frequently. You can write your own Python script(let’s say code1.py) and import it into another code without writing the whole code in the new script again.

Here’s how you can import code1.py in your new Python script.

But, doing so would mean that you import everything that’s in code1.py to your Python code. That isn’t an issue till you start working in situations where your code has to be well optimized for performance, scalability and maintainability.

So, let’s say, we had a small function inside code1 that draws a beautiful chart e.g. chart_code1(). And, that function is the only reason why we wish to import the entire code1.py script. Rather than having to call the entire Python script, we can simply call the function instead.

Here’s how you would typically do it

And, you should be able to use chart_code1 in your new Python script as if it were present in your current Python code.

Next, let’s look at other ways to import Python code.

Using and importlib to run Python code

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import_module() of importlib allows you to import and execute other Python scripts.

The way it works is pretty simple. For our Python script code1.py, all we have to do is:

There’s no need to add .py in import_module().

Let’s go through a case where we have complex directory structures and we wish to use importlib. Directory structure of the Python code we want to run is below:

level1

+ – __init__.py

– level2

+ – __init__.py

– level3.py

In this case if you think you can do importlib.import_module(“level3”), you’ll get an error. This is called relative import, and the way you do it is by using a relative name with anchor explicit.

So, to run Python script level3.py, you can either do

or you can do

Run Python code using runpy

Runpy module locates and executes a Python script without importing it. Usage is pretty simple as you can easily call the module name inside of run_module().

To execute our code1.py module using runpy. Here’s what we will do.

Run Python Code Dynamically

We are going to take a look at exec() function to execute Python scripts dynamically. In Python 2, exec function was actually a statement.

Here’s how it helps you execute a Python code dynamically in case of a string.

Dynamic Code Was Executed

However, using exec() should be a last resort. As it is slow and unpredictable, try to see if there are any other better alternatives available.

Running Python Scripts from a Text Editor

To run Python script using a Python Text Editor you can use the default “run” command or use hot keys like Function + F5 or simply F5(depending on your OS).

Here’s an example of Python script being executed in IDLE.

Source: pitt.edu

However, note that you do not control the virtual environment like how you typically would from a command line interface execution.

That’s where IDEs and Advanced text editors are far better than Code Editors.

Running Python Scripts from an IDE

When it comes to executing scripts from an IDE, you can not only run your Python code, but also debug it and select the Python environment you would like to run it on.

While the IDE’s UI interface may vary, the process would be pretty much similar to save, run and edit a code.

How to run Python scripts from a File Manager

What if there was a way to run a Python script just by double clicking on it? You can actually do that by creating executable files of your code. For example, in the case of Windows OS, you can simply create a .exe extension of your Python script and run it by double clicking on it.

How to run Python scripts from another Python script

Although we haven’t already stated this, but, if you go back up and read, you’ll notice that you can:

Run a Python script via a command line that calls another Python script in it
Use a module like import to load a Python script

That’s it!

Key Takeaway

Code Runner For Python Programming

You can write a Python code in interactive and non interactive modes. Once you exit interactive mode, you lose the data. So, sudo nano your_python_filename.py it!
You can also run your Python Code via IDE, Code Editors or Command line
There are different ways to import a Python code and use it for another script. Pick wisely and look at the advantages and disadvantages.
Python reads the code you write, translates it into bytecodes, which are then used as instructions – all of that happen when you run a Python script. So, learn how to use bytecode to optimize your Python code.

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