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# parser.py
import ast
def get_category(node):
"""Determine the category of an AST node."""
if isinstance(node, (ast.Import, ast.ImportFrom)):
return 'import'
elif isinstance(node, (ast.Assign, ast.AnnAssign, ast.AugAssign)):
return 'assignment'
elif isinstance(node, ast.FunctionDef):
return 'function'
elif isinstance(node, ast.AsyncFunctionDef):
return 'async_function'
elif isinstance(node, ast.ClassDef):
return 'class'
elif isinstance(node, ast.If):
return 'if'
elif isinstance(node, ast.While):
return 'while'
elif isinstance(node, ast.For):
return 'for'
elif isinstance(node, ast.Try):
return 'try'
elif isinstance(node, ast.Return):
return 'return'
elif isinstance(node, ast.Expr):
return 'expression'
else:
return 'other'
def create_vector(category, level, location, total_lines, parent_path):
"""Create a vector optimized for role similarity."""
category_map = {
'import': 1, 'assignment': 2, 'function': 3, 'async_function': 4, 'class': 5,
'if': 6, 'while': 7, 'for': 8, 'try': 9, 'expression': 10, 'spacer': 11,
'other': 12, 'elif': 13, 'else': 14, 'except': 15, 'finally': 16, 'return': 17
}
category_id = category_map.get(category, 0)
start_line, end_line = location
span = (end_line - start_line + 1) / total_lines
center_pos = ((start_line + end_line) / 2) / total_lines
parent_depth = len(parent_path)
parent_weight = 0
for i, parent in enumerate(parent_path):
parent_category = parent.split('[')[0].lower()
parent_weight += category_map.get(parent_category, 0) * (1 / (i + 1))
parent_weight = parent_weight / max(1, len(category_map))
return [category_id, level, center_pos, span, parent_depth, parent_weight]
def parse_node(node, lines, prev_end, level=0, total_lines=None, parent_path=None, counters=None):
if total_lines is None:
total_lines = len(lines)
if parent_path is None:
parent_path = []
if counters is None:
counters = {cat: 0 for cat in ['import', 'assignment', 'function', 'async_function', 'class', 'if', 'while', 'for', 'try', 'return', 'expression', 'other', 'spacer', 'elif', 'else', 'except', 'finally']}
parts = []
start_line = getattr(node, 'lineno', prev_end + 1)
end_line = getattr(node, 'end_lineno', start_line)
category = get_category(node)
counters[category] += 1
node_id = f"{category.capitalize()}[{counters[category]}]"
if start_line > prev_end + 1:
spacer_lines = lines[prev_end:start_line - 1]
counters['spacer'] += 1
spacer_node_id = f"Spacer[{counters['spacer']}]"
spacer_vector = create_vector('spacer', level, (prev_end + 1, start_line - 1), total_lines, parent_path)
parts.append({
'category': 'spacer',
'source': ''.join(spacer_lines),
'location': (prev_end + 1, start_line - 1),
'level': level,
'vector': spacer_vector,
'parent_path': ' -> '.join(parent_path) if parent_path else 'Top-Level',
'node_id': spacer_node_id
})
stmt_lines = lines[start_line - 1:end_line]
current_path = parent_path + [node_id]
node_vector = create_vector(category, level, (start_line, end_line), total_lines, current_path)
parts.append({
'category': category,
'source': ''.join(stmt_lines),
'location': (start_line, end_line),
'level': level,
'vector': node_vector,
'parent_path': ' -> '.join(parent_path) if parent_path else 'Top-Level',
'node_id': node_id
})
nested_prev_end = end_line - 1
for attr in ('body', 'orelse', 'handlers', 'finalbody'):
if hasattr(node, attr) and getattr(node, attr):
sub_parts = []
for child in getattr(node, attr):
if attr == 'orelse' and isinstance(node, ast.If) and child.lineno != start_line:
sub_category = 'elif' if child.lineno != end_line else 'else'
counters[sub_category] += 1
sub_node_id = f"{sub_category.capitalize()}[{counters[sub_category]}]"
sub_vector = create_vector(sub_category, level, (child.lineno, getattr(child, 'end_lineno', child.lineno)), total_lines, current_path)
sub_parts.append({
'category': sub_category,
'source': ''.join(lines[child.lineno - 1:getattr(child, 'end_lineno', child.lineno)]),
'location': (child.lineno, getattr(child, 'end_lineno', child.lineno)),
'level': level,
'vector': sub_vector,
'parent_path': ' -> '.join(parent_path) if parent_path else 'Top-Level',
'node_id': node_id
})
child_parts = parse_node(child, lines, child.lineno - 1, level + 1, total_lines, current_path, counters)
sub_parts.extend(child_parts)
elif attr == 'handlers' and isinstance(child, ast.ExceptHandler):
counters['except'] += 1
sub_node_id = f"Except[{counters['except']}]"
sub_vector = create_vector('except', level, (child.lineno, getattr(child, 'end_lineno', child.lineno)), total_lines, current_path)
sub_parts.append({
'category': 'except',
'source': ''.join(lines[child.lineno - 1:getattr(child, 'end_lineno', child.lineno)]),
'location': (child.lineno, getattr(child, 'end_lineno', child.lineno)),
'level': level,
'vector': sub_vector,
'parent_path': ' -> '.join(parent_path) if parent_path else 'Top-Level',
'node_id': node_id
})
child_parts = parse_node(child, lines, child.lineno - 1, level + 1, total_lines, current_path, counters)
sub_parts.extend(child_parts)
elif attr == 'finalbody':
counters['finally'] += 1
sub_node_id = f"Finally[{counters['finally']}]"
sub_vector = create_vector('finally', level, (child.lineno, getattr(child, 'end_lineno', child.lineno)), total_lines, current_path)
sub_parts.append({
'category': 'finally',
'source': ''.join(lines[child.lineno - 1:getattr(child, 'end_lineno', child.lineno)]),
'location': (child.lineno, getattr(child, 'end_lineno', child.lineno)),
'level': level,
'vector': sub_vector,
'parent_path': ' -> '.join(parent_path) if parent_path else 'Top-Level',
'node_id': node_id
})
child_parts = parse_node(child, lines, child.lineno - 1, level + 1, total_lines, current_path, counters)
sub_parts.extend(child_parts)
else:
child_parts = parse_node(child, lines, nested_prev_end, level + 1, total_lines, current_path, counters)
sub_parts.extend(child_parts)
nested_prev_end = sub_parts[-1]['location'][1] if sub_parts else nested_prev_end
parts.extend(sub_parts)
return parts
def parse_python_code(code):
lines = code.splitlines(keepends=True)
total_lines = len(lines)
try:
tree = ast.parse(code)
except SyntaxError:
return [{'category': 'error', 'source': 'Invalid Python code', 'location': (1, 1), 'level': 0, 'vector': [0, 0, 1.0, 0.0, 0, 0], 'parent_path': 'Top-Level', 'node_id': 'Error[1]'}]
parts = []
prev_end = 0
for stmt in tree.body:
stmt_parts = parse_node(stmt, lines, prev_end, total_lines=total_lines)
parts.extend(stmt_parts)
prev_end = stmt_parts[-1]['location'][1]
if prev_end < total_lines:
remaining_lines = lines[prev_end:]
counters = {'spacer': 0}
counters['spacer'] += 1
spacer_node_id = f"Spacer[{counters['spacer']}]"
spacer_vector = create_vector('spacer', 0, (prev_end + 1, total_lines + 1), total_lines, [])
parts.append({
'category': 'spacer',
'source': ''.join(remaining_lines),
'location': (prev_end + 1, total_lines + 1),
'level': 0,
'vector': spacer_vector,
'parent_path': 'Top-Level',
'node_id': spacer_node_id
})
return parts |