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?

You are missing a ```#!/usr/bin/env python``` on the top of your ```tests02-server.py``` file. — accdias, Apr 13 '19 at 02:49
Can you show us the exact command line that you are using to run your script? - oops..there it is at the top of the output. Thanks @CarlNorum — CryptoFool, Apr 13 '19 at 02:53

score 1 · Accepted Answer · answered Apr 13 '19 at 02:50

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

answered Apr 13 '19 at 02:50

Carl Norum

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I don't believe you - can you show output from your attempt after making that change? – Carl Norum Apr 13 '19 at 02:55
Yeah. That should definitely have fixed the problem. Make sure that your shebang (#!) line is the first line of the file. – CryptoFool Apr 13 '19 at 02:56
From your edit, it does fix the problem with your original question. You just have python bugs now. – Carl Norum Apr 13 '19 at 03:00

score 0 · Answer 2 · answered Apr 13 '19 at 03:09

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.

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

2 Answers2