如何处理莴苣中的多语言数据?

这是我的功能文件:

Feature: Computefactorial
In order to play with Lettuce
As beginners
We'll implement factorial

Scenario: Factorial of 0
    Given I have the number 0
    When I compute its factorial
    Then I see the number علی

这是我的step.py:

from lettuce import *

@step('I have the number (\d+)')
def have_the_number(step, number):
    world.number = int(number)

@step('I compute its factorial')
def compute_its_factorial(step):
    world.number = factorial(world.number)

@step('I see the number (\w+)')
def check_number(step, expected):
    #expected = int(expected)
    assert True

def factorial(number):
    return -1