廢話少說，直接上程式碼

 1 # 傳送端
 2 import socket
 3 
 4 def send_file(file_name,file_socket:socket.socket):
 5     try:
 6         f = open(file_name,'rb')
 7         while True:
 8             data = f.read(1024)
 9             if not data:
10                 break
11             file_socket.send(data)
12         f.close()
 
13     except FileNotFoundError:
14         print(f'沒有找到{file_name}')
15 
16 if __name__ == '__main__':
17     try:
18         file_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
19         file_socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,True)
20         ip = str(input('請輸入接收端IP：
 
'))
21         port = int(input('請輸入接收端埠號：'))
22         file_socket.connect((ip,port))
23         path = r'%s' % input('請輸入檔案所在資料夾：')
24         print(file_socket.recv(1024).decode('gbk'))
25         file_name = str(input())
26         file_socket.send(file_name.encode('gbk'))
27         send_file(path + file_name,file_socket)
 
28     except ConnectionResetError:
29         print('接收端斷開連線')

 1 # 接收端
 2 import socket,os
 3 
 4 def dowload(file_name,file_socket:socket.socket):
 5     os.chdir('D:/Python檔案傳輸/')
 6     f = open(file_name,'wb')
 7     while True:
 8         data = file_socket.recv(1024)
 9         if not data:
10             print('接收完畢！')
11             break
12         f.write(data)
13     f.close()
14 
15 if __name__ == '__main__':
16     try:
17         file_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
18         file_socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,True)
19         file_socket_port = int(input('請輸入埠號：'))
20         file_socket.bind(('',file_socket_port))
21         print('成功啟動，等待連線。。。')
22         file_socket.listen(1)
23         f_socket, f_addr = file_socket.accept()
24         print(f'建立連線{f_addr}')
25 
26         f_socket.send('請輸入檔名'.encode('gbk'))
27         file_name = f_socket.recv(1024)
28         dowload(file_name,f_socket)
29         f_socket.close()
30         file_socket.close()
31     except ConnectionResetError:
32         print('傳送端已斷開連線')
33     except UnicodeDecodeError:
34         print('檔案編碼錯誤，請檢查檔案格式是否正確（暫不支援exe檔案）')