如何在txt文件中找到某个字符串/名称？

def search_string_in_file(file_path, target_string):
    try:
        with open(file_path, 'r') as file:
            line_number = 1
            for line in file:
                if target_string in line:
                    print(f"Found '{target_string}' in line {line_number}: {line}")
                line_number += 1
    except FileNotFoundError:
        print(f"File '{file_path}' not found.")

# 调用示例
file_path = 'example.txt'  # 替换为实际的txt文件路径
target_string = '某个字符串'  # 替换为实际要搜索的字符串
search_string_in_file(file_path, target_string)