installed installed module-attribute installed: Installed = Installed() Installed Check if a package is installed. PySide6 class-attribute instance-attribute PySide6: bool = _version('PySide6') is not None docstring_inheritance class-attribute instance-attribute docstring_inheritance: bool = _version('docstring-inheritance') is not None matplotlib class-attribute instance-attribute matplotlib: bool = _version('matplotlib') is not None numba class-attribute instance-attribute numba: bool = _version('numba') is not None numpy class-attribute instance-attribute numpy: bool = _version('numpy') is not None scipy class-attribute instance-attribute scipy: bool = _version('scipy') is not None __getattr__ __getattr__(package: str) -> bool __getitem__ __getitem__(package: str) -> bool _version _version(package: str) -> str | None Get version of a package, return None if not installed.