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"""Provides a function to report all internal modules for using freezing 
tools.""" 
import types 
from typing import Iterator 
from typing import List 
from typing import Union 


def freeze_includes() -> List[str]: 
    """Return a list of module names used by pytest that should be 
    included by cx_freeze.""" 
    import py
    import _pytest

    result = list(_iter_all_modules(py))
    result += list(_iter_all_modules(_pytest))
    return result


def _iter_all_modules( 
    package: Union[str, types.ModuleType], prefix: str = "", 
) -> Iterator[str]: 
    """Iterate over the names of all modules that can be found in the given 
    package, recursively.
 
        >>> import _pytest 
        >>> list(_iter_all_modules(_pytest)) 
        ['_pytest._argcomplete', '_pytest._code.code', ...] 
    """
    import os
    import pkgutil

    if isinstance(package, str): 
        path = package 
    else:
        # Type ignored because typeshed doesn't define ModuleType.__path__ 
        # (only defined on packages). 
        package_path = package.__path__  # type: ignore[attr-defined] 
        path, prefix = package_path[0], package.__name__ + "." 
    for _, name, is_package in pkgutil.iter_modules([path]):
        if is_package:
            for m in _iter_all_modules(os.path.join(path, name), prefix=name + "."):
                yield prefix + m
        else:
            yield prefix + name