To run a Python script using command line, you need to first save your code as a local file. You can look at certain factors and understand why some functions/data structures are faster than others. You can also use it to understand and guide your Python script’s design decisions. 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. There are some benefits of inspecting bytecode. Think of them as a bunch of instructions that leads to the final outcome. Step 2: The binary file generated, is now read by the interpreter to execute instructions.

py file is compiled and a binary format is generated. Flow Chart of How Python Interpreter Runs Codes When you run this Python script, Python interpreter goes from top to bottom executing each line.Īnd, that’s how Python interpreter executes a Python script.īut that’s not it! There’s a lot more that happens. The block represents a Python script (or function) we wrote, and each block within it, represents a line of code. How are Python scripts executed?Ī nice way to visualize what happens when you execute a Python script is by using the diagram below. Note that when you exit interactive mode, your Python scripts won’t be saved to a local file. With Linux you can simply to Ctrl + D and on Windows you need to press Ctrl + Z + Enter to exit. There are other ways to exit the interactive Python script mode too. You should be back to the command line screen that you started with initially. To exit interactive Python script mode, write the following: >exit()Īnd, hit Enter. So, what you see after print(i) is the output here. Our code snippet was written to print everything including 0 and upto 5. With interactive Python script mode, you can write code snippets and execute them to see if they give desired output or whether they fail. Once you hit enter you should see something like this:

On Windows, go to your Command Prompt and write “python”. Interactive Python Scripting Mode On Windows The image below shows the interactive mode on Mac OS. Launching interactive Python script mode on Mac OS is pretty similar to Linux. Interactive Python Scripting Mode On Mac OSX Type 'help', 'copyright', 'credits' or 'license' for more information.Įnter the Python script interactive mode after pressing “Enter”. Interactive Python Scripting Mode On Linux Here’s how you enter interactive mode in Windows, Linux and MacOS. And, as soon as you hit enter, you’ll be in the interactive mode. 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).

Run a Python script using another Python script.

Run Python scripts with a specific Python Version on Anaconda.

OS Command line (also known as shell or Terminal).

How to run a python script on mac