如何将一个文本文件拆分成多个片段，每个片段中有特定的行数？

def split_text_file(file_path, lines_per_segment):
    with open(file_path, 'r') as file:
        segment_lines = []
        segment_count = 1
        for line in file:
            segment_lines.append(line)
            if len(segment_lines) == lines_per_segment:
                segment_file_path = f'segment_{segment_count}.txt'
                with open(segment_file_path, 'w') as segment_file:
                    segment_file.writelines(segment_lines)
                segment_lines = []
                segment_count += 1
        if segment_lines:
            segment_file_path = f'segment_{segment_count}.txt'
            with open(segment_file_path, 'w') as segment_file:
                segment_file.writelines(segment_lines)

# 调用示例
split_text_file('input.txt', 5)