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They are imported
- The reason some files get compiled automatically is because they are imported; for instance, if you use import mylib.py, Python will compile mylib.py so that future import statements run a little faster. If you later change mylib.py, then it will get re-compiled next time it is imported (Python uses the file date to see that this happens.)
stackoverflow.com/questions/471191/why-compile-python-code
The reason some files get compiled automatically is because they are imported; for instance, if you use import mylib.py, Python will compile mylib.py so that future import statements run a little faster.
Compiling Python code is accomplished using the compile() function, which takes three arguments: the Python code, a filename, and a mode. The filename and mode are optional parameters, but specifying a filename can be useful for debugging.
May 16, 2024 · Compiled Python modules can only run on matching interpreter versions. The solution is to create multiple built distributions, one for each of the targeted Python versions, with matching compiled modules.
- Charles Coggins
Mar 20, 2022 · Files with .pyc extension are the result of compiling files with .py extension. A .pyc file for a given Python module gets automatically created when that module is imported. Note: as a Python developer you will only make code changes to .py files.
The Python implementation compiles the files as needed. This is different than Java, for example, where you have to run the Java compiler to turn Java source code into compiled class files. For this reason, Java is often called a compiled language, while Python is called an interpreted language.
2 days ago · The py_compile module provides a function to generate a byte-code file from a source file, and another function used when the module source file is invoked as a script.
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Dec 7, 2021 · When compiling a Python script (.py), you’ll end up with a compiled Python (.pyc, .pyo). The file is not as readable as its predecessor, since it is a bytecode sequence. Don’t worry, if you know the way, you can revert it to a readable Python script. Our case study. In this writeup, we will analyze a short script named demo_script.py: