hw.py

class File:
    def __init__(self, id, name) -> None:
        self.id = id
        self.name = name

    def __eq__(self, other):
        return self.id == other

    def __repr__(self):
        return f"Name: {self.name} ID: {self.id}"


class Folder:
    def __init__(self, id, name) -> None:
        self.id = id
        self.name = name
        self.files = []

    def __eq__(self, other):
        return self.id == other.id

    def __repr__(self):
        return f"Name: {self.name} ID: {self.id} files: {self.files}\n\n"


def move(folders, source_file: int, destination_folder: int):
    file = None
    for folder in folders:
        if folder.id == source_file:
            raise Exception("Source File ID cannot be a folder ID")
        if destination_folder in folder.files:
            raise Exception("Dest Folder ID cannot be a file ID")

        if source_file in folder.files:
            file = folder.files[folder.files.index(source_file)]
            folder.files.remove(file)
            break

    if not file:
        raise Exception("File specified cannot be found")
    temp_folder = Folder(destination_folder, "")
    folder_index = folders.index(temp_folder)
    folders[folder_index].files.append(file)
    return folders


if __name__ == "__main__":
    folder1 = Folder(1, "folder 1")
    folder1.files.append(File(2, "File 1"))
    folder1.files.append(File(3, "File 2"))
    folder1.files.append(File(4, "File 3"))

    folder2 = Folder(15, "folder 2")
    folder2.files.append(File(5, "File 4"))

    list_folders = [folder1, folder2]
    res = move(list_folders, 3, 15)
    print(res)