environment.exceptions

Searchable error codes for Kida template errors.

Format: K-{CATEGORY}-{NUMBER} Categories: LEX (lexer), PAR (parser), RUN (runtime), TPL (template loading)

Each code maps to a documentation URL for quick lookup: https://lbliii.github.io/kida/docs/errors/#k-run-001

Template source context around an error line.

Provides surrounding lines of template source for display in error messages. Used by TemplateRuntimeError and UndefinedError to show the template line where the error occurred.

Base exception for all Kida template errors.

All template-related exceptions inherit from this class, enabling broad exception handling:

>>> try:
...     template.render()
... except TemplateError as e:
...     log.error(f"Template error: {e}")

Template not found by any configured loader.

Raised whenEnvironment.get_template(name)cannot locate the template in any of the loader's search paths.

Parse-time syntax error in template source.

Raised by the Parser when template syntax is invalid. Includes source location for error reporting.

Whensource and linenoare provided, the error message includes a source snippet with the offending line. Ifcol_offsetis also given, a caret (^) points at the exact column.

Render-time error with rich debugging context.

Raised during template rendering when an operation fails. Provides detailed information to help diagnose the issue:

• Template name and line number
• The expression that caused the error
• Actual values and their types
• Actionable suggestion for fixing

Output Format:

        Runtime Error: 'NoneType' object has no attribute 'title'
          Location: article.html:15
          Expression: {{ post.title }}
          Values:
            post = None (NoneType)
          Suggestion: Check if 'post' is defined, or use {{ post.title | default('') }}
        ```

A required value was None or missing.

Raised by the| requirefilter when a value that must be present is None or missing. Useful for validating required context variables.

Attempted to compare None values, typically during sorting.

Raised when| sortor similar operations encounter None values that cannot be compared. Provides information about which items have None values for the sort attribute.

Raised when accessing an undefined variable.

Strict mode is enabled by default in Kida. When a template references a variable that doesn't exist in the context, this error is raised instead of silently returning None.

Ifavailable_namesis provided, a "Did you mean?" suggestion is included when a close match is found (usingdifflib.get_close_matches).

To fix:

• Pass the variable in render(): template.render(undefined_var="value")
• Use the default filter: {{ undefined_var | default("fallback") }}