python3 使用format函数对URL进行拼接

# 完整的url
url = 'https://www.aliexpress.com/item/1215121315.html'
# 尝试拼接
url = 'https://www.aliexpress.com/item/-/{}.html'.format(1215121315)
print(url)
https://www.aliexpress.com/item/-/1215121315.html