- May 2025
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pythononline.io pythononline.io
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Welcome to Python Online Compiler!Key features:• Run Python code directly in your browser• Install packages with pip• Share your code with others• Multiple tabs for different files• Light and dark themes
Say goodbye to Python setup hassles! Code directly in your browser with zero installation needed. Write your code, hit RUN, and see results instantly. Our clean, powerful editor gives you syntax highlighting, multiple tabs, and easy package installation with pip.
Need to share your work? One click generates a link anyone can use to view and run your code. Switch between light and dark themes, customize your layout, and code Python anywhere, anytime. Try our random code examples to get started quickly.
Python Online - the simplest way to write, run, and share Python code!
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- Dec 2023
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eddieantonio.ca eddieantonio.ca
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When you run your Python program using [CPython], the code is parsed and converted to an internal bytecode format, which is then executed inside the VM. From the user’s perspective, this is clearly an interpreter—they run their program from source. But if you look under CPython’s scaly skin, you’ll see that there is definitely some compiling going on. The answer is that it is both. CPython is an interpreter, and it has a compiler.
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You can actually compile all of your Python code beforehand using the compileall module on the command line:
$ python3 -m compileall .This will place the compiled bytecode of all Python files in the current directory in pycache/ and show you any compiler errors.
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mathspp.com mathspp.com
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Recap
In this article you started implementing your own version of Python. To do so, you needed to create four main components:
A tokenizer: * accepts strings as input (supposedly, source code); * chunks the input into atomic pieces called tokens; * produces tokens regardless of their sequence making sense or not.
A parser: * accepts tokens as input; * consumes the tokens one at a time, while making sense they come in an order that makes sense; * produces a tree that represents the syntax of the original code.
A compiler: * accepts a tree as input; * traverses the tree to produce bytecode operations.
An interpreter: * accepts bytecode as input; * traverses the bytecode and performs the operation that each one represents; * uses a stack to help with the computations.
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To write our compiler, we'll just create a class with a method compile. The method compile will mimic the method parse in its structure. However, the method parse produces tree nodes and the method compile will produce bytecode operations.
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The compiler is the part of our program that will take a tree (an AST, to be more precise) and it will produce a sequence of instructions that are simple and easy to follow.
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Instead of interpreting the tree directly, we'll use a compiler to create an intermediate layer.
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