pymodule

pymodule is a Python module, used here as a representative name to illustrate the common characteristics of Python modules. In Python, a module is a file containing Python definitions and statements. The code in the module is executed the first time it is imported, and the resulting namespace is exposed through a module object whose name matches the file name without the .py extension. Thus, if a file named pymodule.py exists, it becomes accessible as the module pymodule after import.

A typical module contains functions, classes, and variables that are meant to be reused across a program. When you import pymodule, the interpreter creates a module object and binds it to the name pymodule in your current namespace. You can access the module’s attributes, such as functions and variables, using the dot notation (for example, pymodule.some_function). The module object also exposes metadata such as __name__, __file__, and __package__, and its name is stored in __name__ while its global namespace is stored in __dict__.

Modules can be created alongside packages or as standalone files. If pymodule.py defines a function or class, you can import it in another script and use it without redefining it. It is common to place a small, runnable test under a guard like if __name__ == "__main__": to ensure code runs only when the module is executed as a script, not when it is imported.

In practice, modules are organized into packages with directories containing __init__.py, which can expose a curated public interface via __all__ and enable relative imports. Python’s import system supports dynamic loading, reloading, and name resolution through sys.modules and importlib, enabling flexible use of pymodule across projects.