如何根据Python中的字符数拆分文本文件

def split_text_file(file_path, chunk_size):
    with open(file_path, 'r') as file:
        text = file.read()

    chunks = [text[i:i+chunk_size] for i in range(0, len(text), chunk_size)]

    for i, chunk in enumerate(chunks):
        new_file_path = f"chunk_{i+1}.txt"
        with open(new_file_path, 'w') as new_file:
            new_file.write(chunk)

        print(f"Chunk {i+1} written to {new_file_path}")

# 示例用法
split_text_file('input.txt', 1000)