如何发送字典类型python

import json
import os

# 如何发送字典类型python
filename = ''
share_dict = ''
header = {
    'filename': 'a.txt',
    'md5': 'aidjgflsdhjg',
    'size': os.path.getsize(r'%s/%s' %(share_dict, filename))
}
# 2.将字典转换成json格式的字符串
header_json = json.dumps(header)
# 3.将字符串转换成二进制数据流
send_data = header_json.encode('utf-8')
# 4.将二进制数据流转换成字符串
recv_hear_json = send_data.decode('utf-8')
# 5.将json格式字符串转换成字典
recv_hear = json.loads(recv_hear_json)
print(recv_hear)

size = recv_hear['size']
print(size)