AI Slop Code RIsk Monitor

google/yapf

A formatter for Python files

8.1 Moderate pattern signal View on GitHub

Maintenance and Governance Review

This report summarizes scanner evidence for google/yapf, a Python project with 13,993 GitHub stars. SynthScan examined 30,418 lines of code across 93 source files, recording 208 pattern matches distributed across 14 syntactic categories. The legacy adjusted pattern signal is 8.1 (Moderate pattern signal); it is not an authorship estimate.

Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.

8.1
Adjusted Signal
8.1
Raw Pattern Score
100%
Time Factor
2026-10-02
Last Push
14.0K
Stars
Python
Language
30.4K
Lines of Code
93
Files
208
Pattern Hits
2026-10-12
Scan Date
0.08
HC Hit Rate

Risk Review · v3

Use each vector to guide manual verification of the underlying findings.

Cognitive Ownership Risk 26.1/100 · MEDIUM

Can maintainers explain intent, assumptions, and trade-offs? 170 finding(s).

Hallucinated Dependency & Supply Chain Risk 4.0/100 · LOW

Are imports declared and package/API names verified? 25 finding(s).

Agent Over-Engineering Ratio 14.6/100 · LOW

Are wrappers, guards, and repeated structures necessary? 64 finding(s).

PR Review Velocity Impact 33.6/100 · MEDIUM

Which changes need focused human review? 208 finding(s).

What These Metrics Mean

Adjusted Signal
Legacy pattern score normalized per 1,000 scanned lines and multiplied by the repository-level time factor. It is not an estimate of AI authorship.
Raw Pattern Score
Sum of severity- and context-weighted pattern findings before applying the time factor.
Time Factor
A coarse multiplier based on repository last-push metadata. It does not identify when individual code was written.
Pattern Hits
Count of configured pattern findings. Review each location and surrounding code before acting.
HC Hit Rate
High- and critical-severity findings per scanned file. Severity is a configured detector weight, not proof of a vulnerability or authorship.
Lines / Files
Scan coverage denominators used by the legacy normalized score.

Pattern-Signal History

This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.

Severity Breakdown

Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.

CRITICAL 0HIGH 7MEDIUM 3LOW 198

Directory Score Breakdown

This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.

Pattern Findings

The scanner identified 208 distinct pattern matches across 14 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.

Over-Commented Block70 hits · 70 pts
SeverityFileLineSnippetContext
LOWplugins/pre-commit.sh1#!/usr/bin/env bashCOMMENT
LOWyapftests/comment_splicer_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/logical_line_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/pytree_utils_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/reformatter_python3_test.py1# Copyright 2016 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/reformatter_basic_test.py1# Copyright 2016 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/blank_line_calculator_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/reformatter_style_config_test.py1# Copyright 2016 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/__init__.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/reformatter_facebook_test.py1# Copyright 2016 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/pytree_unwrapper_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/format_token_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/utils.py1# -*- coding: utf-8 -*-COMMENT
LOWyapftests/subtype_assigner_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/pytree_visitor_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/main_test.py1# -*- coding: utf-8 -*-COMMENT
LOWyapftests/reformatter_buganizer_test.py1# Copyright 2016 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/split_penalty_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/style_test.py1# -*- coding: utf-8 -*-COMMENT
LOWyapftests/yapf_test.py1# -*- coding: utf-8 -*-COMMENT
LOWyapftests/line_joiner_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/yapf_test_helper.py1# Copyright 2016 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/reformatter_pep8_test.py1# Copyright 2016 Google Inc. All Rights Reserved.COMMENT
LOWyapftests/file_resources_test.py1# -*- coding: utf-8 -*-COMMENT
LOWyapftests/format_decision_state_test.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/__init__.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/__main__.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/pytree_visitor.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/pytree_utils.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/comment_splicer.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/comment_splicer.py81 standalone=False), prev_leaf[0])COMMENT
LOWyapf/pytree/__init__.py1# Copyright 2021 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/blank_line_calculator.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/split_penalty.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/pytree_unwrapper.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/subtype_assigner.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pytree/continuation_splicer.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pyparser/pyparser_utils.py1# Copyright 2022 Bill Wendling, All Rights Reserved.COMMENT
LOWyapf/pyparser/pyparser.py1# Copyright 2022 Bill Wendling, All Rights Reserved.COMMENT
LOWyapf/pyparser/__init__.py1# Copyright 2022 Google Inc. All Rights Reserved.COMMENT
LOWyapf/pyparser/split_penalty_visitor.py1# Copyright 2022 Bill Wendling, All Rights Reserved.COMMENT
LOWyapf/pyparser/split_penalty_visitor.py41 ############################################################################COMMENT
LOWyapf/pyparser/split_penalty_visitor.py81 # AsyncFunctionDef(name=Name,COMMENT
LOWyapf/pyparser/split_penalty_visitor.py141 # AnnAssign(target=Expr,COMMENT
LOWyapf/pyparser/split_penalty_visitor.py181 return self.generic_visit(node)COMMENT
LOWyapf/pyparser/split_penalty_visitor.py201 # orelse=[...],COMMENT
LOWyapf/pyparser/split_penalty_visitor.py841COMMENT
LOWyapf/yapflib/object_state.py1# Copyright 2017 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/yapf_api.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/format_decision_state.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/format_decision_state.py481 _IsFunctionCallWithArguments(current)):COMMENT
LOWyapf/yapflib/style.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/logical_line.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/logical_line.py241COMMENT
LOWyapf/yapflib/__init__.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/reformatter.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/line_joiner.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/split_penalty.py1# Copyright 2022 Bill Wendling, All Rights Reserved.COMMENT
LOWyapf/yapflib/file_resources.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
LOWyapf/yapflib/format_token.py1# Copyright 2015 Google Inc. All Rights Reserved.COMMENT
10 more matches not shown…
Hyper-Verbose Identifiers49 hits · 57 pts
SeverityFileLineSnippetContext
LOWyapftests/reformatter_python3_test.py260 async def run_sync_in_worker_thread(sync_fn, *args, cancellable=False, limiter=None):CODE
LOWyapftests/reformatter_python3_test.py266 def run_sync_in_worker_thread(sync_fn, *args, cancellable=False, limiter=None):CODE
LOWyapftests/reformatter_python3_test.py283 async def run_sync_in_worker_thread(CODE
LOWyapftests/reformatter_python3_test.py302 def run_sync_in_worker_thread(sync_fn, *args, cancellable=False, limiter=None):CODE
LOWyapftests/reformatter_basic_test.py2312 def _pack_results_for_constraint_or(cls, combination, constraints):CODE
LOWyapftests/reformatter_basic_test.py2326 def _pack_results_for_constraint_or(cls, combination, constraints):CODE
LOWyapftests/blank_line_calculator_test.py250 def test_unicode_filename_in_sdist(self, sdist_unicode, tmpdir, monkeypatch):STRING
LOW⚡yapftests/reformatter_facebook_test.py33 def overly_long_function_name(CODE
LOW⚡yapftests/reformatter_facebook_test.py38 def overly_long_function_name(just_one_arg, **kwargs):CODE
LOW⚡yapftests/reformatter_facebook_test.py46 def overly_long_function_name(CODE
LOW⚡yapftests/reformatter_facebook_test.py52 def overly_long_function_name(CODE
LOW⚡yapftests/reformatter_facebook_test.py62 def overly_long_function_name(a, b, c, d, e, f, g, h, i, j, k, l, m,CODE
LOW⚡yapftests/reformatter_facebook_test.py67 def overly_long_function_name(CODE
LOW⚡yapftests/reformatter_facebook_test.py77 def overly_long_function_name(CODE
LOW⚡yapftests/reformatter_facebook_test.py85 def overly_long_function_name(CODE
LOWyapftests/reformatter_facebook_test.py250 def _pack_results_for_constraint_or():CODE
LOWyapftests/reformatter_facebook_test.py288 def _pack_results_for_constraint_or():CODE
LOWyapftests/reformatter_facebook_test.py371 def _pack_results_for_constraint_or(cls, combination, constraints):CODE
LOWyapftests/reformatter_buganizer_test.py33 def _create_testing_simulator_and_sink(CODE
LOWyapftests/reformatter_buganizer_test.py221 def xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(CODE
LOWyapftests/yapf_test.py1116 def overly_long_function_name(first_argument_on_the_same_line,CODE
LOWyapftests/yapf_test.py1121 def overly_long_function_name(first_argument_on_the_same_line,CODE
LOW⚡yapftests/yapf_test.py1139 def overly_long_function_name(CODE
LOW⚡yapftests/yapf_test.py1145 # def overly_long_function_name(COMMENT
LOW⚡yapftests/yapf_test.py1151 def overly_long_function_name(CODE
LOWyapftests/reformatter_pep8_test.py627 def simple_pass_function_with_an_extremely_long_name_and_some_arguments(STRING
LOW⚡yapftests/file_resources_test.py59 def test_get_exclude_file_patterns_from_yapfignore(self):CODE
LOW⚡yapftests/file_resources_test.py69 def test_get_exclude_file_patterns_from_yapfignore_with_wrong_syntax(self):CODE
LOW⚡yapftests/file_resources_test.py78 def test_get_exclude_file_patterns_from_pyproject(self):CODE
LOW⚡yapftests/file_resources_test.py91 def test_get_exclude_file_patterns_from_pyproject_no_ignore_section(self):CODE
LOW⚡yapftests/file_resources_test.py100 def test_get_exclude_file_patterns_from_pyproject_ignore_section_empty(self):CODE
LOW⚡yapftests/file_resources_test.py110 def test_get_exclude_file_patterns_with_no_config_files(self):CODE
LOW⚡yapftests/file_resources_test.py505 def test_line_ending_linefeed(self):CODE
LOW⚡yapftests/file_resources_test.py510 def test_line_ending_carriage_return(self):CODE
LOW⚡yapftests/file_resources_test.py520 def test_line_ending_weighted(self):CODE
LOWyapftests/file_resources_test.py131 def test_no_local_style_custom_default(self):CODE
LOWyapftests/file_resources_test.py188 def mock_exists_implementation(path):CODE
LOWyapftests/file_resources_test.py238 def test_nonrecursive_find_in_dir(self):CODE
LOWyapftests/file_resources_test.py252 def test_recursive_find_in_dir(self):CODE
LOWyapftests/file_resources_test.py269 def test_recursive_find_in_dir_with_exclude(self):CODE
LOWyapftests/file_resources_test.py290 def test_find_with_excluded_hidden_dirs(self):CODE
LOWyapftests/file_resources_test.py312 def test_find_with_excluded_hidden_dirs_relative(self):CODE
LOWyapftests/file_resources_test.py354 def test_find_with_excluded_dirs(self):CODE
LOWyapftests/file_resources_test.py389 def test_find_with_excluded_current_dir(self):CODE
LOWyapftests/file_resources_test.py406 def test_empty_without_py_extension(self):CODE
LOWyapftests/file_resources_test.py429 def test_with_invalid_encoding(self):CODE
LOWyapftests/file_resources_test.py494 def test_write_encoded_to_stdout(self):CODE
LOWyapftests/file_resources_test.py535 def test_line_ending_no_newline(self):CODE
LOWyapf/yapflib/format_token.py129 def formatted_whitespace_prefix(self):CODE
Deep Nesting43 hits · 43 pts
SeverityFileLineSnippetContext
LOWyapf/pytree/comment_splicer.py31CODE
LOWyapf/pytree/comment_splicer.py46CODE
LOWyapf/pytree/split_penalty.py120CODE
LOWyapf/pytree/split_penalty.py208CODE
LOWyapf/pytree/split_penalty.py274CODE
LOWyapf/pytree/split_penalty.py477CODE
LOWyapf/pytree/pytree_unwrapper.py408CODE
LOWyapf/pytree/subtype_assigner.py62CODE
LOWyapf/pytree/subtype_assigner.py139CODE
LOWyapf/pytree/subtype_assigner.py294CODE
LOWyapf/pyparser/pyparser.py84CODE
LOWyapf/yapflib/yapf_api.py281CODE
LOWyapf/yapflib/format_decision_state.py1162CODE
LOWyapf/yapflib/format_decision_state.py168CODE
LOWyapf/yapflib/format_decision_state.py852CODE
LOWyapf/yapflib/format_decision_state.py1012CODE
LOWyapf/yapflib/logical_line.py543CODE
LOWyapf/yapflib/reformatter.py36CODE
LOWyapf/yapflib/reformatter.py269CODE
LOWyapf/yapflib/reformatter.py398CODE
LOWyapf/yapflib/reformatter.py607CODE
LOWyapf/yapflib/reformatter.py718CODE
LOWyapf/yapflib/file_resources.py41CODE
LOWyapf/yapflib/file_resources.py96CODE
LOWyapf/yapflib/file_resources.py182CODE
LOWyapf/yapflib/file_resources.py195CODE
LOWthird_party/yapf_third_party/_ylib2to3/patcomp.py70CODE
LOWthird_party/yapf_third_party/_ylib2to3/patcomp.py141CODE
LOWthird_party/yapf_third_party/_ylib2to3/fixer_util.py393CODE
LOWthird_party/yapf_third_party/_ylib2to3/fixer_util.py454CODE
LOWthird_party/yapf_third_party/_ylib2to3/pytree.py836CODE
LOWthird_party/yapf_third_party/_ylib2to3/pytree.py588CODE
LOWthird_party/yapf_third_party/_ylib2to3/pytree.py685CODE
LOWthird_party/yapf_third_party/_ylib2to3/pytree.py696CODE
LOWthird_party/yapf_third_party/_ylib2to3/pytree.py741CODE
LOWthird_party/yapf_third_party/_ylib2to3/pytree.py786CODE
LOWthird_party/yapf_third_party/_ylib2to3/pgen2/pgen.py129CODE
LOWthird_party/yapf_third_party/_ylib2to3/pgen2/pgen.py181CODE
LOWthird_party/yapf_third_party/_ylib2to3/pgen2/pgen.py243CODE
LOWthird_party/yapf_third_party/_ylib2to3/pgen2/conv.py83CODE
LOWthird_party/yapf_third_party/_ylib2to3/pgen2/parse.py269CODE
LOW…ird_party/yapf_third_party/_ylib2to3/pgen2/tokenize.py375CODE
LOW…ird_party/yapf_third_party/_ylib2to3/pgen2/tokenize.py233CODE
Empty Error Handlers6 hits · 30 pts
SeverityFileLineSnippetContext
HIGHyapf/yapflib/file_resources.py121except IOError:CODE
HIGHyapf/yapflib/file_resources.py134except IOError:CODE
HIGHthird_party/yapf_third_party/_ylib2to3/pgen2/grammar.py121except OSError:CODE
HIGHthird_party/yapf_third_party/_ylib2to3/pgen2/conv.py241except StopIteration:CODE
HIGHthird_party/yapf_third_party/_ylib2to3/pgen2/driver.py243except OSError:CODE
HIGH…ird_party/yapf_third_party/_ylib2to3/pgen2/tokenize.py195except StopTokenizing:CODE
Unused Imports12 hits · 12 pts
SeverityFileLineSnippetContext
LOWyapftests/reformatter_python3_test.py16CODE
LOWyapftests/reformatter_basic_test.py16CODE
LOWyapftests/subtype_assigner_test.py20CODE
LOWyapftests/main_test.py18CODE
LOWyapftests/yapf_test.py18CODE
LOWyapftests/yapf_test.py19CODE
LOWyapftests/yapf_test.py26CODE
LOWyapftests/yapf_test.py28CODE
LOWyapf/pyparser/pyparser.py36CODE
LOWyapf/pyparser/split_penalty_visitor.py20CODE
LOWyapf/yapflib/logical_line.py26CODE
LOWyapf/yapflib/split_penalty.py15CODE
Self-Referential Comments3 hits · 9 pts
SeverityFileLineSnippetContext
MEDIUMyapftests/file_resources_test.py138 # Create an empty .style.yapf file in test_tmpdirCOMMENT
MEDIUMyapf/pytree/pytree_utils.py106 # This function is tiny, but the incantation for invoking the parser correctlyCOMMENT
MEDIUMthird_party/yapf_third_party/_ylib2to3/fixer_util.py305# The following functions are to find bindings in a suiteCOMMENT
Fake / Example Data12 hits · 8 pts
SeverityFileLineSnippetContext
LOW⚡yapftests/reformatter_basic_test.py1547 text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec a diam lectus. "\\STRING
LOW⚡yapftests/reformatter_basic_test.py1547 text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec a diam lectus. "\\STRING
LOW⚡yapftests/reformatter_basic_test.py1551 "Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet"STRING
LOW⚡yapftests/reformatter_basic_test.py1551 "Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet"STRING
LOWyapftests/reformatter_basic_test.py1604 'Lorem ipsum dolor sit amet, consetetur adipiscing elit. Donec a diam lectus. 'STRING
LOWyapftests/reformatter_basic_test.py1604 'Lorem ipsum dolor sit amet, consetetur adipiscing elit. Donec a diam lectus. 'STRING
LOW⚡yapftests/reformatter_basic_test.py2111 ('lorem ipsum', 'dolor sit amet'):STRING
LOW⚡yapftests/reformatter_basic_test.py2111 ('lorem ipsum', 'dolor sit amet'):STRING
LOW⚡yapftests/reformatter_basic_test.py2121 ('lorem ipsum', 'dolor sit amet'):STRING
LOW⚡yapftests/reformatter_basic_test.py2121 ('lorem ipsum', 'dolor sit amet'):STRING
LOWyapftests/reformatter_pep8_test.py389 'description': _("Lorem ipsum dolor met sit amet elit, si vis pacem para bellum "STRING
LOWyapftests/reformatter_pep8_test.py397 "Lorem ipsum dolor met sit amet elit, si vis pacem para bellum "STRING
Excessive Try-Catch Wrapping5 hits · 5 pts
SeverityFileLineSnippetContext
LOWyapf/__init__.py120 except Exception as e:CODE
LOWyapf/__init__.py247 except Exception as e:CODE
LOWyapf/pyparser/pyparser.py73 except Exception:CODE
LOWyapf/yapflib/yapf_api.py199 except Exception as e:CODE
LOWthird_party/yapf_third_party/_ylib2to3/pgen2/pgen.py346 except Exception:CODE
Cross-Language Confusion1 hit · 5 pts
SeverityFileLineSnippetContext
HIGHthird_party/yapf_third_party/_ylib2to3/pgen2/parse.py285 self.push(t, itsdfa, newstate, context)CODE
AI Structural Patterns2 hits · 2 pts
SeverityFileLineSnippetContext
LOWyapftests/utils.py45CODE
LOWyapf/__init__.py167CODE
Modern Structural Boilerplate2 hits · 2 pts
SeverityFileLineSnippetContext
LOWthird_party/yapf_third_party/_ylib2to3/pgen2/driver.py15__all__ = ['Driver', 'load_grammar']CODE
LOW…ird_party/yapf_third_party/_ylib2to3/pgen2/tokenize.py52__all__ = [x for x in dir(token) if x[0] != '_'CODE
Redundant / Tautological Comments1 hit · 2 pts
SeverityFileLineSnippetContext
LOWyapf/yapflib/format_decision_state.py785 # Check if the token terminates the current comprehension.COMMENT
AI Slop Vocabulary1 hit · 2 pts
SeverityFileLineSnippetContext
LOWthird_party/yapf_third_party/_ylib2to3/pgen2/pgen.py388 # Can't just return self.arcs == other.arcs, because thatCOMMENT
Slop Phrases1 hit · 0 pts
SeverityFileLineSnippetContext
LOWyapf/pytree/pytree_visitor.py53 methods can be overridden. Don't forget to invoke DefaultNodeVisit for nodesSTRING