Any folder having .py files is a Python package.

A folder having .py files along with a special file i.e, __init__.py in it is an importable Python package.

Assertion. The documentation for a Python module should be written in triple-quoted strings.

Reason. The docstrings are triple-quoted strings in Python that are displayed as documentation when help <module> command is issued.

Assertion. After importing a module through import statement, all its function definitions, variables, constants etc. are made available in the program.

Reason. Imported module's definitions do not become part of the program's namespace if imported through an import <module> statement.