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# -*- coding: utf-8 -*- |
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__all__ = ['Condition'] |
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class Condition(object): |
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''' |
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class Condition permits to reduce the size of the data to return |
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by applying a rule of filtering |
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''' |
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def __init__(self, **kwargs): |
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''' |
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set the 2 filters type : match and does_not_match |
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''' |
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if 'does_not_match' in kwargs: |
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self.does_not_match = kwargs['does_not_match'] |
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if 'match' in kwargs: |
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self.match = kwargs['match'] |
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def check(self, datas, *filers): |
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''' |
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this method permits to reduce the quantity of information to read |
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by applying some filtering |
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here '*filers' can receive a list of properties to be filtered |
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''' |
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# special case : no filter : want to read all the feed |
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if self.match == "" and self.does_not_match == '': |
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yield datas |
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# let's filtering : |
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else: |
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condition1 = False |
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condition2 = False |
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# arg contain the property from which we want to check the 'data' |
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for prop in filers: |
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# check if my datas contains my property |
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if prop in datas: |
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# filter to find only this data |
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if self.match != '' and condition1 is False: |
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condition1 = self.filter_that(self.match, |
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datas[prop]) |
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# filter to exclude this data, |
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# when found, continue to the next entry |
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if self.does_not_match != '' and condition2 is False: |
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condition2 = self.filter_that(self.does_not_match, |
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datas[prop]) |
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if condition2: |
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continue |
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if condition1 and condition2 is False: |
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yield datas |
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def filter_that(self, criteria, data): |
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''' |
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this method just use the module 're' to check if the data contain |
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the string to find |
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''' |
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import re |
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prog = re.compile(criteria) |
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return True if prog.match(data) else False |
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foxmask /
django-th
