Python defines two types of packages, regular packages and namespace packages. Regular packages are traditional packages as they existed in Python 3.2 and earlier. A regular package is typically implemented as a directory containing an __init__.py
file. When a regular package is imported, this __init__.py
file is implicitly executed, and the objects it defines are bound to names in the package’s namespace. The __init__.py
file can contain the same Python code that any other module can contain, and Python will add some additional attributes to the module when it is imported.
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