Python 1. Parsing a document
1.1. Providing the source
1.2. Localized errors
1.3. Error formats
1.4. Cursor lookup
2. Querying content
2.1. Field values
2.2. List values
2.3. Keys and Comments
2.4. Predefined Types
2.5. Custom Types
3. Querying elements
3.1. Optional/required
3.2. Dynamic layouts
3.3. Requiring all elements
4. Touching elements
4.1. Assert all touched
4.2. Manual touching
5. Error Metadata
5.1. Message
5.2. Text
5.3. Snippet
5.4. Cursor
5.5. Selection
6. Addendum
6.1. A complete example
6.2. AST inspection
6.3. FAQ

Text

Returns a one-liner that describes the error in human language.

>>> try:
...   # ...
... except Error as e:
...   return e.message
"In line 4 'a' is copied into itself."

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