INI vs TOML vs YAML: what to use for configs
Compare INI, TOML, and YAML for configuration: types, comments, nesting, readability, and when conversion to JSON is safer for automation.
YAML comments (#) pitfalls Playbook
YAML comments (#) pitfalls. Practical troubleshooting runbook for repeatable fixes and safer conversions.
TL;DR: Validate -> locate exact failing spot -> fix the minimal part -> re-validate.
Execution steps
- Validate input locally. Start with a validator or parser-friendly converter.
- Locate root cause. Use line/position/error token to isolate one failing place.
- Apply a minimal fix. Do not refactor all content at once.
- Re-validate and continue. Once clean, convert/export safely.
Recommended tools
Relevant guides
Auto-selected from existing guides for this topic. Need more: search by keyword.
yaml: line 2: did not find expected '-' indicator: what it means and how to fix it
Fix "yaml: line 2: did not find expected '-' indicator": Go/Kubernetes YAML error. What it means and the fastest fixes (indentation, tabs, lists) without uploading data.
yaml.reader.ReaderError: unacceptable character #x0000: what it means and how to fix it
Fix PyYAML error (unacceptable character #x0000): why it happens and the quickest fixes (indentation/tabs/duplicate keys) + local validation (no upload).
yaml.scanner.ScannerError: found character '\t' that cannot start any token: what it means and how to fix it
Fix PyYAML error (found character '\t' that cannot start any token): why it happens and the quickest fixes (indentation/tabs/duplicate keys) + local validation (no upload).
yaml.parser.ParserError: expected <block end>, but found '<block mapping start>': what it means and how to fix it
Fix PyYAML error (expected <block end>, but found '<block mapping start>'): why it happens and the quickest fixes (indentation/tabs/duplicate keys) + local validation (no upload).
org.yaml.snakeyaml.parser.ParserException: expected <block end>, but found '<block mapping start>': what it means and how to fix it
Fix SnakeYAML error (expected <block end>, but found '<block mapping start>'): common causes and quick fixes (indentation, tabs, lists) + validate locally (no upload).
Guides by topic
Browse troubleshooting and conversion guides grouped by topic (JSON, CSV, XML, YAML, encoding, config formats, privacy).
INI file format explained: sections, keys, comments
Understand INI sections ([...]), key/value rules, comment styles (; and #), duplicate keys, and how to convert INI to strict JSON safely.
Related actions
- Deep topic hub: YAML comments (#) pitfalls
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Related playbooks
- YAML merge keys (<<:)
- YAML to JSON: safe no-upload workflow
- YAML validator workflow
- YAML anchors and aliases (& * )
- Unicode/encoding issues in YAML
- Trailing spaces in YAML
Related by intent
- Intent hub for YAML comments (#) pitfalls
- Execution playbook
- Method comparison
- Alternative flows
- Migration path
- Benchmark baseline
- Case study
- Trend report
- Cluster pillar
- Cross-cluster pillar: JSON
- Linkable data asset
Expert signal
Expert note: YAML comments (#) pitfalls usually resolves fastest when triage starts from strict validation and then branches to comparison/alternative paths based on input quality.
Data snapshot 2026
| Metric | Value |
|---|---|
| Intent confidence score | 81/100 |
| Predicted CTR uplift potential | 24% |
| Target crawl depth | < 4 clicks |
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