Parso is a Python parser that supports error recovery and round-trip parsing for different Python versions (in multiple Python versions). Parso is also able to list multiple syntax errors in your Python file.

Parso has been battle-tested by jedi. It was pulled out of jedi to be useful for other projects as well.

Parso consists of a small API to parse Python and analyse the syntax tree.

A simple example:

>>> import parso >>> module = parso.parse('hello + 1', version="3.6") >>> expr = module.children[0] >>> expr PythonNode(arith_expr, [, , ]) >>> print(expr.get_code()) hello + 1 >>> name = expr.children[0] >>> name >>> name.end_pos (1, 5) >>> expr.end_pos (1, 9)

To list multiple issues:

>>> grammar = parso.load_grammar() >>> module = grammar.parse('foo +\nbar\ncontinue') >>> error1, error2 = grammar.iter_errors(module) >>> error1.message 'SyntaxError: invalid syntax' >>> error2.message "SyntaxError: 'continue' not properly in loop"