When I run my socket program, there get: `import: command not found`

Question

I write a socket server programmer:

#-*- coding:utf-8 -*-
# Author:sele

import socket

HOST = '127.0.0.1'
PORT = 65432

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT))
    s.listen()
    conn, addr = s.accept()
    with conn:
        print('Connected by', addr)
        while True:
            data = conn.recv(1024)
            if not data:
                break

            conn.sendall(data)

when I run it in my command, there gets error:

sele-MacBook-Pro:test01 ldl$ ./tests02-server.py
./tests02-server.py: line 5: import: command not found
;; connection timed out; no servers could be reached
Error: Current platform "darwin 18" does not match expected platform "darwin 16"
Error: If you upgraded your OS, please follow the migration instructions: https://trac.macports.org/wiki/Migration
OS platform mismatch
while executing
"mportinit ui_options global_options global_variations"
Error: /opt/local/bin/PORT: Failed to initialize MacPorts, OS platform mismatch
./tests02-server.py: line 10: syntax error near unexpected token ('
./tests02-server.py: line 10:with socket.socket(socket.AF_INET,
socket.SOCK_STREAM) as s:'

why there can not find the import?

---

EDIT-01

I inserted this line to my first line.

#!/usr/bin/env python

when I run the script, there gets this error:

sele-MacBook-Pro:test01 ldl$ ./tests02-server.py 
Traceback (most recent call last):
  File "./tests02-server.py", line 11, in <module>
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
AttributeError: __exit__
aircrafts-MacBook-Pro:test01 ldl$ ./tests02-server.py 
Traceback (most recent call last):
  File "./tests02-server.py", line 11, in <module>
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
AttributeError: __exit__

Answer 1

You're running your program as a shell script, not a python program. Add an appropriate #! line:

#!/usr/bin/env python 

to the top of your program, or run it explicitly from the command line:

$ python tests02-server.py

Answer 2

The answer to your new question is that you can't use socket.socket(socket.AF_INET, socket.SOCK_STREAM) with with. So that a with statement can clean up the resource it is working with, that resource's object has to have an __exit__ method. What socket.socket(socket.AF_INET, socket.SOCK_STREAM) returns obviously has no __exit__ method for with to call, hence this error.