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a/arcanist/linter/PythonMutableDefaultLinter.php b/arcanist/linter/PythonMutableDefaultLinter.php new file mode 100644 --- /dev/null +++ b/arcanist/linter/PythonMutableDefaultLinter.php @@ -0,0 +1,62 @@ + ArcanistLintSeverity::SEVERITY_WARNING, + ); + } + + public function getLintNameMap() { + return array( + self::MUTABLE_DEFAULT_FOUND => pht('Mutable default arguments should '. + 'generally not be used in python.'), + ); + } + + public function lintPath($path) { + $path = Filesystem::resolvePath($path, $this->getProjectRoot()); + $fileContent = Filesystem::readFile($path); + + // Match all function definitions containing list, dict or set literals + // used as default arguments. + $pattern = "/[ ]*def \w+\([\w, \n=\(\)\"']+=\s*(\[|\{)[^:]+:/"; + if (preg_match_all($pattern, $fileContent, $matches, + PREG_OFFSET_CAPTURE)) { + foreach ($matches[1] as $match) { + list($fullLine, $offset) = $match; + + $this->raiseLintAtOffset( + $offset, + self::MUTABLE_DEFAULT_FOUND, + pht('Found mutable default argument in function.'), + $fullLine, + null); + } + } + } +} diff --git a/test/functional/test_framework/messages.py b/test/functional/test_framework/messages.py --- a/test/functional/test_framework/messages.py +++ b/test/functional/test_framework/messages.py @@ -690,7 +690,9 @@ return [key0, key1] # Version 2 compact blocks use wtxid in shortids (rather than txid) - def initialize_from_block(self, block, nonce=0, prefill_list=[0]): + def initialize_from_block(self, block, nonce=0, prefill_list=None): + if prefill_list is None: + prefill_list = [0] self.header = CBlockHeader(block) self.nonce = nonce self.prefilled_txn = [PrefilledTransaction(i, block.vtx[i]) diff --git a/test/functional/wallet_importmulti.py b/test/functional/wallet_importmulti.py --- a/test/functional/wallet_importmulti.py +++ b/test/functional/wallet_importmulti.py @@ -45,8 +45,10 @@ self.setup_nodes() def test_importmulti(self, req, success, error_code=None, - error_message=None, warnings=[]): + error_message=None, warnings=None): """Run importmulti and assert success""" + if warnings is None: + warnings = [] result = self.nodes[1].importmulti([req]) observed_warnings = [] if 'warnings' in result[0]: