How to use the thefuck.utils.eager function in thefuck

@eager
def _parse_apt_operations(help_text_lines):
    is_commands_list = False
    for line in help_text_lines:
        line = line.decode().strip()
        if is_commands_list and line:
            yield line.split()[0]
        elif line.startswith('Basic commands:') \
                or line.startswith('Most used commands:'):
            is_commands_list = True

@eager
def _get_cask_install_lines(output):
    for line in output.split('\n'):
        line = line.strip()
        if line.startswith('brew cask install'):
            yield line

@eager
def _get_available_commands(stdout):
    commands_listing = False
    for line in stdout.split('\n'):
        if line.startswith('where  is one of:'):
            commands_listing = True
        elif commands_listing:
            if not line:
                break

            for command in line.split(', '):
                stripped = command.strip()
                if stripped:
                    yield stripped

@eager
def _get_all_tasks(gradle):
    proc = Popen([gradle, 'tasks'], stdout=PIPE)
    should_yield = False
    for line in proc.stdout.readlines():
        line = line.decode().strip()
        if line.startswith('----'):
            should_yield = True
            continue

        if not line.strip():
            should_yield = False
            continue

        if should_yield and not line.startswith('All tasks runnable from root project'):
            yield line.split(' ')[0]

@eager
def _get_possible_interfaces():
    proc = subprocess.Popen(['ifconfig', '-a'], stdout=subprocess.PIPE)
    for line in proc.stdout.readlines():
        line = line.decode()
        if line and line != '\n' and not line.startswith(' '):
            yield line.split(' ')[0]

@eager
def _get_all_commands():
    proc = subprocess.Popen(['gem', 'help', 'commands'],
                            stdout=subprocess.PIPE)

    for line in proc.stdout.readlines():
        line = line.decode()

        if line.startswith('    '):
            yield line.strip().split(' ')[0]

@eager
def _get_between(content, start, end=None):
    should_yield = False
    for line in content.split('\n'):
        if start in line:
            should_yield = True
            continue

        if end and end in line:
            return

        if should_yield and line:
            yield line.strip().split(' ')[0]

@eager
def get_new_command(command):
    output = command.output.strip()
    if is_arg_url(command):
        yield command.script.replace('open ', 'open http://')
    elif output.startswith('The file ') and output.endswith(' does not exist.'):
        arg = command.script.split(' ', 1)[1]
        for option in ['touch', 'mkdir']:
            yield shell.and_(u'{} {}'.format(option, arg), command.script)

@eager
def _parse_apt_get_and_cache_operations(help_text_lines):
    is_commands_list = False
    for line in help_text_lines:
        line = line.decode().strip()
        if is_commands_list:
            if not line:
                return

            yield line.split()[0]
        elif line.startswith('Commands:'):
            is_commands_list = True

@eager
def _get_all_environments():
    root = Path('~/.virtualenvs').expanduser()
    if not root.is_dir():
        return

    for child in root.iterdir():
        if child.is_dir():
            yield child.name