def get_signature_names(self):
        signature_expr = re.compile("^(META-INF/)(.*)(\.RSA|\.EC|\.DSA)$")
        signatures = []

        for i in self.get_files():
            if signature_expr.search(i):
                signatures.append(i)

        if len(signatures) > 0:
            return signatures

        return None
Extract pool attributes from arbitary dict.
dataset/ETHPy150Open androguard/androguard/androguard/core/bytecodes/apk.py/APK.get_signature_names--crossover with--dataset/ETHPy150Open SpriteLink/NIPAP/nipap-www/nipapwww/controllers/xhr.py/XhrController.extract_pool_attr