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Dir : ~/snap/core24/1055/lib/python3.12/test/support/

Edit File: ast_helper.py

import ast

class ASTTestMixin:
    """Test mixing to have basic assertions for AST nodes."""

def assertASTEqual(self, ast1, ast2):
        # Ensure the comparisons start at an AST node
        self.assertIsInstance(ast1, ast.AST)
        self.assertIsInstance(ast2, ast.AST)

# An AST comparison routine modeled after ast.dump(), but
        # instead of string building, it traverses the two trees
        # in lock-step.
        def traverse_compare(a, b, missing=object()):
            if type(a) is not type(b):
                self.fail(f"{type(a)!r} is not {type(b)!r}")
            if isinstance(a, ast.AST):
                for field in a._fields:
                    value1 = getattr(a, field, missing)
                    value2 = getattr(b, field, missing)
                    # Singletons are equal by definition, so further
                    # testing can be skipped.
                    if value1 is not value2:
                        traverse_compare(value1, value2)
            elif isinstance(a, list):
                try:
                    for node1, node2 in zip(a, b, strict=True):
                        traverse_compare(node1, node2)
                except ValueError:
                    # Attempt a "pretty" error ala assertSequenceEqual()
                    len1 = len(a)
                    len2 = len(b)
                    if len1 > len2:
                        what = "First"
                        diff = len1 - len2
                    else:
                        what = "Second"
                        diff = len2 - len1
                    msg = f"{what} list contains {diff} additional elements."
                    raise self.failureException(msg) from None
            elif a != b:
                self.fail(f"{a!r} != {b!r}")
        traverse_compare(ast1, ast2)