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tree-sitter-fortran

library0.6.0pypypi✓ verified 85d ago

Fortran grammar for tree-sitter, providing a parser and syntax tree generation for Fortran code (versions 0.6.0). Released as a Python package; also available as an npm package for language bindings. Maintained community grammar with occasional releases.

devops

pip install tree-sitter-fortran

github ↗homepage ↗

INSTALL

IMPORT

SIG · TREE-SITTER-FORTRA

tree-sitter-fortran

devopspythonv0.6.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

language

✓ from tree_sitter_fortran import language

✗ from tree_sitter import Language

Do not import Language from tree-sitter; use the language function from the grammar package. Also ensure tree_sitter is installed first.

Parser

✓ from tree_sitter import Parser

✗ from tree_sitter_fortran import Parser

Parser is from the core tree-sitter package, not from the grammar package.

Parse a simple Fortran program and print the syntax tree.

from tree_sitter import Parser from tree_sitter_fortran import language FORTURN_LANG = language() parser = Parser() parser.set_language(FORTURN_LANG) tree = parser.parse(b"""program hello print *, 'Hello, World!' end program hello""") print(tree.root_node.sexp())

Debug

Known issues

gotchaThe language object is created by calling `language()` (a function), not by importing a constant. This is different from some other tree-sitter grammars that expose a `LANGUAGE` constant.

fix

Use `from tree_sitter_fortran import language` and then `lang = language()`.

affects: all

deprecatedTree-sitter Python package changed import paths for grammars around v0.20. Older code may use `Language('build/my-languages.so', 'fortran')` which is deprecated.

fix

Use the grammar-specific package (`tree-sitter-fortran`) and import `language` directly.

affects: 0.6.0 (library)

gotchaThe grammar package (0.6.0) requires Python >=3.9 and tree-sitter >=0.20. Installing on older Python or tree-sitter versions will fail.

fix

Ensure your environment uses Python 3.9+ and run `pip install 'tree-sitter>=0.20'` before or alongside the grammar.

affects: 0.6.0

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'tree_sitter_fortran'

The grammar package is not installed or installed in the wrong environment.

fix

Run `pip install tree-sitter-fortran` in the correct Python environment.

ImportError: cannot import name 'LANGUAGE' from 'tree_sitter_fortran'

The grammar used to have a LANGUAGE constant (or user expected one) but now exposes a `language()` function.

fix

Replace `from tree_sitter_fortran import LANGUAGE` with `from tree_sitter_fortran import language` and call `language()`.

TypeError: Parser.set_language() argument must be a Language object, not function

Forgot to call the `language()` function, passing the function itself instead.

fix

Use `parser.set_language(language())` (with parentheses).

Upgrade

Version history

0.6.0latest on PyPI · released Apr 24, 2026

Audit

Dependencies

tree-sitterrequiredCore Tree-sitter Python bindings required for all versions

Agent activity

5 hits · last 30 days

node

Amazon

Resources

githubhttps://github.com/stadelmanma/tree-sitter-fortran ↗

homepagehttps://github.com/stadelmanma/tree-sitter-fortran ↗