如何在其子文件中的第2列包含值范围(-6到-7)的文件名？

import os

def find_files_with_range(folder_path):
    target_files = []
    
    for filename in os.listdir(folder_path):
        file_path = os.path.join(folder_path, filename)
        
        if os.path.isfile(file_path):
            with open(file_path, 'r') as file:
                lines = file.readlines()
                
                for line in lines:
                    columns = line.split()
                    
                    if len(columns) >= 2:
                        value = float(columns[1])
                        
                        if -7 <= value <= -6:
                            target_files.append(filename)
                            break
    
    return target_files