o Df. @srdZddlmZddlmZgdZddZddZd d Zd d Z dddZ ddZ ddZ ddZ ddZd S)zFunctional utilities.)Thenablepromise) maybe_promiseensure_promiseppartialpreplace ready_promise starpromise transformwrapcCs|r t|ts t|S|S)zBReturn None if p is undefined, otherwise make sure it's a promise.) isinstancerrprF/home/ubuntu/webapp/venv/lib/python3.10/site-packages/vine/funtools.pyr s rcCs|durtSt|S)zeEnsure p is a promise. If p is not a promise, a new promise is created with p' as callback. N)rrrrrrrsrcOs,t|}|r ||j|_|r|j||S)z-Create/modify promise with partial arguments.)rargskwargsupdate)rrrrrrrs   rcsfdd}t|S)zReplace promise arguments. This will force the promise to disregard any arguments the promise is fulfilled with, and to be called with the provided arguments instead. csiSNr)___rrrrr _replacer/szpreplace.._replacerr)rrrrrrrr(srNcGst|}|||S)z)Create promise that is already fulfilled.)r)callbackrrrrrr 4sr cOs t|||S)z%Create promise, using star arguments.r)funrrrrrr ;s r cOs.t|}tt||||f}|t|j|S)a?Filter final argument to a promise. E.g. to coerce callback argument to :class:`int`:: transform(int, callback) or a more complex example extracting something from a dict and coercing the value to :class:`float`: .. code-block:: python def filter_key_value(key, filter_, mapping): return filter_(mapping[key]) def get_page_expires(self, url, callback=None): return self.request( 'GET', url, callback=transform(get_key, callback, 'PageExpireValue', int), ) )rr _transbackthenthrow)filter_r filter_args filter_kwargsPrrrr @sr cCs<z|||fi|}W||Sty|YdSwr) Exceptionr)rrrrretrrrr\s  rcsfdd}|S)zWrap promise. This wraps the promise such that if the promise is called with a promise as argument, we attach ourselves to that promise instead. cs6t|dkrt|dtr|dS|i|S)Nr)lenr rr)rrrrron_callkszwrap..on_callr)rr'rrrr es r r)__doc__abstractrpromisesr__all__rrrrr r r rr rrrrs