Get active project root path in Sublime Text

get_active_project_path.py

def get_active_project_path():
    import os
    window = sublime.active_window()
    folders = window.folders()
    if len(folders) == 1:
        return folders[0]
    else:
        active_view = window.active_view()
        active_file_name = active_view.file_name() if active_view else None
        if not active_file_name:
            return folders[0] if len(folders) else os.path.expanduser("~")
        for folder in folders:
            if active_file_name.startswith(folder):
                return folder
        return os.path.dirname(active_file_name)