如何在python中将任意长度的位串写入二进制文件？

import struct

def write_bitstring_to_binary_file(bitstring, filename):
    # 将位串转换为字节串
    byte_string = int(bitstring, 2).to_bytes((len(bitstring) + 7) // 8, byteorder='big')
    
    # 写入二进制文件
    with open(filename, 'wb') as file:
        file.write(byte_string)

# 示例用法
bitstring = '1010101010101010101010101010101010101010101010101010101010101010'
filename = 'output.bin'
write_bitstring_to_binary_file(bitstring, filename)