編寫一個 Python 腳本來 ping 一個 IP 地址列表並返回主機是 UP 還是 DOWN 並且它只是打印我的 IP

Question

我編寫了腳本來 ping 列表中的 IP 地址列表。 但是，當我運行腳本時，它只會打印我所有的 IP 地址，但實際上並沒有根據我的判斷來 ping 它們。

誰能告訴我我錯過了什么，我將不勝感激。

#!/usr/bin/env python3

import os

ip_list = ['8.8.8.8'
'8.8.4.4'
'1.1.1.1'
'4.4.4.4']
for ip in ip_list:
    response = os.popen(f"ping {ip}").read()
    if "Received = 4" in response:
        print(f"UP {ip} Ping Successful, Host is UP!")
    else:
        print(f"DOWN {ip} Ping Unsuccessful, Host is DOWN.")

我按如下方式重新編寫了代碼，但它仍然不喜歡我正在做的事情。 我在 macOS 上的 bash shell 中運行。

#!/usr/bin/env python3

import subprocess

ip_list = ['8.8.8.8', '8.8.4.4', '1.1.1.1']
for ip in ip_list:
    p = subprocess.run(['ping '+ip])
    p.wait()
    if p.poll():
        print (ip+" is down")
    else:
        print (ip+" is up")

我從該代碼中得到的輸出在這里：

matt$ python3 Python_Ping_Public3.py
Traceback (most recent call last):
  File "/Users/matt/Desktop/Python_Ping_Public3.py", line 7, in <module>
    p = subprocess.run(['ping '+ip])
  File "/usr/local/Cellar/python@3.9/3.9.13_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 505, in run
    with Popen(*popenargs, **kwargs) as process:
  File "/usr/local/Cellar/python@3.9/3.9.13_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/local/Cellar/python@3.9/3.9.13_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 1821, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'ping 8.8.8.8'

Answer 1

考慮一下：

letters = ['A'
'B'
'C']
print(letters)

這會打印ABC ，因為這三個文字之間沒有逗號。

這更有意義：

letters = ['A',
'B',
'C']
print(letters)

空格在 Python 中是有意義的，但行尾不能代替列表分隔符，它仍然是, 。

這更清楚：

#!/usr/bin/env python3

import os

ip_list = ['8.8.8.8', '8.8.4.4', '1.1.1.1', '4.4.4.4']
for ip in ip_list:
    response = os.popen(f"ping {ip}").read()
    if "Received = 4" in response:
        print(f"UP {ip} Ping Successful, Host is UP!")
    else:
        print(f"DOWN {ip} Ping Unsuccessful, Host is DOWN.")