human
Solve the following python programming problem given the following code:
def execute(self) : 
    if (not os.path.isfile (self.default_config_location)) : 
        self.setup_default_config (self.default_config_location) 
targets = self.context.targets (self.is_signtarget) 
    with self.invalidated (targets) as invalidation_check : 
        invalid_targets = [] 
        for vt in invalidation_check.invalid_vts : 
            invalid_targets.extend (vt.targets) 
for target in invalid_targets : 
            def get_products_path(target) : 
                "Get path of target's unsigned apks as created by AaptBuilder." 
                unsigned_apks = self.context.products.get ('apk') 
                packages = unsigned_apks.get (target) 
                if packages : 
                    for (tgts, products) in packages.items () : 
                        for prod in products : 
                            (yield os.path.join (tgts, prod)) 
packages = list (get_products_path (target)) 
            for unsigned_apk in packages : 
                keystores = KeystoreResolver.resolve (self.config_file) 
                for key in keystores : 
                    outdir = self.sign_apk_out (release_apk, keystores [key].build_type) 
                    safe_mkdir (outdir) 
                    args = self._render_args (target, keystores [key], unsigned_apk, outdir) 
                    with self.context.new_workunit (name = 'sign_apk', labels = [WorkUnitLabel.MULTITOOL]) as workunit : 
                        returncode = subprocess.call (args, stdout = workunit.output ('stdout'), stderr = workunit.output ('stderr')) 
                        if returncode : 
                            raise TaskError ('The SignApk jarsigner process exited non-zero: {0}'.format (returncode)) 
for target in targets : 
        release_path = self.sign_apk_out (target, 'release') 
        release_apk = self.signed_package_name (target, 'release') 
        if os.path.isfile (os.path.join (release_path, release_apk)) : 
            self.context.products.get ('release_apk').add (target, release_path).append...

    
    

    Fix the buggy line: outdir = self.sign_apk_out (release_apk, keystores [key].build_type)
assistant
#Here is Python program to fix the buggy line: outdir = self.

outdir = self.sign_apk_out (target, keystores [key].build_type)