优化并改编以下代码，使其和原来有部分出入但实现效果相同： 1. import socket 2. 3. 4. def client(): 5. # 创建套接字 6. sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 7. # 连接服务器 8. ip = input("Please input the receiver's ipv4 address:") 9. sock.connect((ip, 14000)) 10. # 发送文件名 11. filename = input("Please input the filename:") 12. sock.send(filename.encode()) 13. # 接收服务器返回的消息 14. data = sock.recv(1024) 15. print(data.decode()) 16. # 发送文件内容 17. with open(filename, 'rb') as f: 18. for line in f: 19. sock.send(line)20. print('File has sent successfully') 21. # 关闭套接字 22. sock.close() 23. 24. 25.def server(): 26. # 创建套接字 27. sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 28. # 绑定地址和端口号 29. 30. sock.bind(('', 14000)) 31. # 监听连接请求 32. sock.listen(5) 33. while True: 34. # 接受连接请求 35. conn, addr = sock.accept() 36. print('The connection has been established') 37. # 接收文件名 38. filename = conn.recv(1024).decode() 39. print(filename) 40. # 发送消息到客户端 41. conn.send('Got the file name'.encode()) 42. # 接收文件内容并写入文件 43. with open(filename, 'wb') as f: 44. while True: 45. data = conn.recv(1024) 46. if not data: 47. break 48. f.write(data) 49. print('File has received successfully') 50. # 关闭连接套接字 51. conn.close() 52. 53. 54.if name == 'main': 55. while True: 56. answer = input("This is a simple program relying on the Tc p protocol, \n if you want to send the file," 57. "please input 1, \n if you want to receive the file, please input 2, \n if you want exit, " 58. "please input 0: \n") 59. if answer == '0': 60. break 61. if answer == '1': 4162. client() 63. if answer == '2': 64. server()

改编后的代码如下：

1. import socket

2.

3.

4. def send_file():

5. # 创建套接字

6. sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

7. # 连接服务器

8. ip = input("Please input the receiver's ipv4 address:")

9. sock.connect((ip, 14000))

10. # 发送文件名

11. filename = input("Please input the filename:")

12. sock.send(filename.encode())

13. # 接收服务器返回的消息

14. data = sock.recv(1024)

15. print(data.decode())

16. # 发送文件内容

17. with open(filename, 'rb') as f:

18. file_bytes = f.read()

19. sock.sendall(file_bytes)

20. print('File has sent successfully')

21. # 关闭套接字

22. sock.close()

23.

24.

25. def receive_file():

26. # 创建套接字

27. sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

28. # 绑定地址和端口号

29. sock.bind(('', 14000))

30. # 监听连接请求

31. sock.listen(5)

32. while True:

33. # 接受连接请求

34. conn, addr = sock.accept()

35. print('The connection has been established')

36. # 接收文件名

37. filename = conn.recv(1024).decode()

38. print(filename)

39. # 发送消息到客户端

40. conn.send('Got the file name'.encode())

41. # 接收文件内容并写入文件

42. with open(filename, 'wb') as f:

43. while True:

44. data = conn.recv(1024)

45. if not data:

46. break

47. f.write(data)

48. print('File has received successfully')

49. # 关闭连接套接字

50. conn.close()

51.

52.

53. if __name__ == '__main__':

54. while True:

55. answer = input("This is a simple program relying on the TCP protocol,\nif you want to send the file, please input 1,\nif you want to receive the file, please input 2,\nif you want exit, please input 0:\n")

56. if answer == '0':

57. break

58. if answer == '1':

59. send_file()

60. if answer == '2':

61. receive_file()

相较于原来的代码，改编后的代码主要改动如下：

1. 将两个函数命名为send_file和receive_file，使其更加明确功能。

2. 在发送文件内容时，使用read()函数读取整个文件，然后使用sendall()函数一次性发送所有内容，而不是使用for循环逐行发送。

3. 在主函数中，将if name == 'main': 改为if __name__ == '__main__':，使其更加规范。

4. 在用户输入时，将提示信息分行，并修正了一些错别字和标点符号错误。