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def remove_empty_fields(data_):
    """
        Recursively remove all empty fields from a nested
        dict structure. Note, a non-empty field could turn
        into an empty one after its children deleted.
        
        E.g,
        
        {
            "location": {

tianchu

/*
 * Authenticate Django users in node.js.
 *
 * Django is great for many projects, while node.js does some fantastic
 * jobs that Django couldn't. For example, you may have a Django app
 * managing your user accounts and another real-time service or application
 * running on Node, then you probably will need to read Django user session
 * to authenticate users in the Node project.
 *
 * This gist is not production ready yet, but it demonstrates how could it

tianchu

URL_REGEX = re.compile(r"^(http|https)://.+$")

IP_ADDRESS_V4_REGEX = re.compile(r"^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}"
                                 r"(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$")

US_ZIP_REGEX = re.compile(r"\d{5}(\-\d{4})?$")

UK_ZIP_REGEX = re.compile(r"^((GIR ?0AA)|((([A-PR-UWYZ][A-HK-Y]?[0-9][0-9]?)"
   r"|(([A-PR-UWYZ][0-9][A-HJKSTUW])"
   r"|([A-PR-UWYZ][A-HK-Y][0-9][ABEHMNPRV-Y]))) ?"