Library

Everything you need to level up your coding skills.

YAML

YAML Error Did Not Find Expected Key and How to Fix It

Why a line indented between two levels raises did not find expected key, how PyYAML words it differently, and how to realign. Output from three parsers.

6 min read

YAML

YAML Error Found Character That Cannot Start Any Token

Which characters trigger this scanner error, a tab, at sign, backtick or percent sign, what each looks like in output and the fix that clears it.

6 min read

YAML

YAML Error Mapping Values Are Not Allowed Here Fixed

What mapping values are not allowed here means, three causes found in real files, an unquoted colon, a stray space and a double value, and the fix for each.

6 min read

YAMLGuide

Fixing YAML Errors That Make No Sense Step by Step

A YAML debugging guide: the error catalog across three parsers, a worked session through five stacked mistakes, silent failures and tools to prevent them.

20 min read

YAML

The Norway Problem and YAML Boolean Surprises Explained

Why the country code NO becomes False in YAML 1.1, how keys collide, which parsers are affected and three fixes: quote, use a 1.2 parser or a schema.

5 min read

YAMLGuide

YAML Syntax You Need to Stop Guessing At and Start Knowing

A complete guide to everyday YAML syntax: indentation, scalars, quoting, collections, block strings, anchors, null and versions, tested with real parsers.

19 min read

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