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What is Python Interpreter?

The program that reads and executes Python code, translating it into machine instructions at runtime.

The Python interpreter (CPython is the reference implementation) reads Python source code, compiles it to bytecode, and executes it on the Python Virtual Machine (PVM). This happens transparently each time you run a script.

Other implementations include PyPy (JIT-compiled for speed), Jython (Java platform), and IronPython (.NET platform).

Related Terms

Virtual Environment
An isolated Python environment that maintains its own set of packages, independent of the system Python installation.
Python Wheel
A built distribution format (.whl) that allows faster installation of Python packages by avoiding the need for compilation.
Docstring
A string literal placed as the first statement in a module, class, or function to document its purpose and usage.
Type Hints
Optional annotations that indicate the expected types of variables, function parameters, and return values.
Poetry
A modern Python dependency management and packaging tool that handles virtual environments, locking, and publishing.
Python Iterator Protocol
The interface requiring __iter__() and __next__() methods, enabling objects to be used in for loops and other iteration contexts.
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