如何在python中将已读文档中的每3行合并起来

def merge_lines(file_path):
    merged_lines = []
    with open(file_path, 'r') as file:
        lines = file.readlines()
        for i in range(0, len(lines), 3):
            merged_lines.append(''.join(lines[i:i+3]))
    return merged_lines

file_path = 'path/to/your/file.txt'
merged_lines = merge_lines(file_path)
print(merged_lines)