import re

def extract_o_option(file_path):
    pattern = re.compile(r'o\s+(\S+)')
    with open(file_path, 'r') as file:
        for line in file:
            match = pattern.search(line)
            if match:
                return match.group(1)
    return None

# 使用示例
file_path = 'C:/Users/Administrator/Desktop/29282/29282_9cm_x1.obj'
result = extract_o_option(file_path)
if result:
    print(f'Found -o option with value: {result}')
else:
    print('No -o option found')