canonicalize_url()方法格式化 url

示例代码：

from w3lib.url import canonicalize_url

url1 = 'http://www.baidu.com?id=123&name=python'
url2 = 'http://www.baidu.com?name=python&id=123'
result1 = canonicalize_url(url1)
result2 = canonicalize_url(url2)
print(result1)
print(result2)

运行结果：