Core_EDA

# Python Training

## what is a python module?

A module is a file containing Python definitions and statements. 

The file name is the module name with the suffix .py appended. 

Within a module, the module's name (as a string) is available as the value of the global variable name

## what is a python package?

A Python module which can contain submodules or recursively, subpackages. Technically, a package is a Python module with an path attribute.

A traditional package, such as a directory containing an init.py file

Namespace packages may have no physical representation, and specifically are not like a regula r package because they have no init.py file.

in Vesper, each sub module is a package, please remember add init.py to the submodule and submodule/python, submodule/export.

in the __init__.py, you could export some class to this package

## Recommend way to import a module in Vesper

In release version, we will encrypt the python code which may cause some unexpected issues, so we  recommend to import a vesper module by:

```

from xxx.yyy.zzz import aaa

```

xxx is the submodule name, yyy could be python or export, zzz is the script under xxx/yyy

## Reference:

Python Decorator: https://www.geeksforgeeks.org/decorators-in-python/

Python Coroutines: https://docs.python.org/3/library/asyncio-task.html

Python C++ interaction by pybind:   https://pybind11.readthedocs.io/en/stable/basics.html