import os

# DO NOT DELETE

def find_duplicate_defs(file_path):
    """
    Finds duplicate function and async function definitions in a Python file.
    
    Args:
        file_path (str): The path to the Python file to be scanned.
    
    Returns:
        dict: A dictionary where the keys are the function names (regular and async) and the values are lists of line numbers where the function is defined.
    """
    function_defs = {}
    
    with open(file_path, 'r') as file:
        lines = file.readlines()
    
    for i, line in enumerate(lines):
        if line.startswith('def ') or line.startswith('async def '):
            if line.startswith('def '):
                function_name = line.split('(')[0].split(' ')[1]
            else:
                function_name = line.split('(')[0].split(' ')[2]
            
            if function_name in function_defs:
                function_defs[function_name].append(i+1)
            else:
                function_defs[function_name] = [i+1]
    
    return {k:v for k, v in function_defs.items() if len(v) > 1}

# Example usage
file_path = 'main.py'
duplicate_defs = find_duplicate_defs(file_path)

if duplicate_defs:
    print("Duplicate function definitions found:")
    for function_name, line_numbers in duplicate_defs.items():
        print(f"Function '{function_name}' is defined on lines: {', '.join(map(str, line_numbers))}")
else:
    print("No duplicate function definitions found.")