what is py in python
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in python, the _pycache_ directory is a special directory that is automatically created by the python interpreter to store compiled bytecode files (.pyc) generated from python source files (.py). these compiled bytecode files are created to improve the execution performance of python programs.
when a python source file is executed, the python interpreter first compiles the source code into bytecode. this compilation step is performed to speed up the execution of the program, as bytecode is faster to interpret than the original source code.
the compiled bytecode is stored in files with a .pyc extension. these files are saved in the _pycache_ directory, which is created in the same directory as the source file. the presence of these compiled files allows the interpreter to skip the compilation step if the source file hasn't changed since the last execution.
automatic creation: the _pycache_ directory is automatically created by the python interpreter when a python script is executed.
file naming: the bytecode files within _pycache_ are named based on the python version and the source file's name. for example, if your source file is example.py, the corresponding bytecode file might be something like __pycache__/example.cpython-38.pyc, where 38 represents the python version.
timestamp checking: when a python script is executed, the interpreter checks the modification timestamp of the source file. if the source file has been modified since the last execution, the interpreter recompiles the source code and updates the bytecode file in __pycache__.
let's consider a simple python script named example.py:
when you run this script, the _pycache_ directory will be created in the same location, and a bytecode file will be generated within it.
to observe the _pycache_ directory and the generated bytecode, you can follow these steps:
remember that the _pycache_ directory is typically safe to ignore when version-controlling your code, as it can be regenerated by the ...
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