Question

附加我的代码段。

目标：我试图在一定时间间隔内对网站进行ping操作（用户定义）。如果该URL有效，它将在默认浏览器中打开该网页。如果没有，它将继续ping，直到用户定义的时间间隔到期为止。

问题：代码可正常运行，但需遵循指令

响应= os.system（“ ping” +网址）

它会在屏幕上弹出cmd窗口，我每次都需要将其最小化。一直手动进行很烦人。我有什么办法可以调整终端窗口的大小或使其最小化，直到代码到期？

对OS进行的一些手动研究使我进入了os.get_terminal_size（），但没什么。我还研究了其他一些可以解决此问题但没有任何信息的库

import os, time, webbrowser

#Enter URL that need to check. Add input()
url = "167.6.2.200"
input_time = float(input("How long ping should work: "))

current_time = time.time()   #note current time
actual_time = 0
isHostOn=0

#r = (os.get_terminal_size())
response =0 

#Execute the loop till the time expires entered by User
while((input_time + current_time) > actual_time): 
    response = os.system("ping " + url)
    if response ==0:
        webbrowser.open_new_tab("https://167.6.2.200:446/")
        break;
    else:
        #add Exception if any
        #print("no")
        pass # do nothing

    actual_time = time.time()
    #time.sleep(5)

是否有可能每次调整打开的cmd窗口的大小/最小化？在后台执行命令的任何更改。

P.S：我正在使用Windows 10操作系统

Answer 1

（对于Windows 10）

考虑使用subprocess模块，如下所示：

>>> import os, subprocess
>>> startupinfo = subprocess.STARTUPINFO()
>>> startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
>>> with subprocess.Popen("ping 192.168.1.1", startupinfo=startupinfo, text=True, stdout=subprocess.PIPE) as p:
    for line in p.stdout:
        print(line, end="")



Pinging 192.168.1.1 with 32 bytes of data:
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms
>>> with subprocess.Popen("ping 10.1.10.1", startupinfo=startupinfo, text=True, stdout=subprocess.PIPE) as p:
    for line in p.stdout:
        print(line, end="")



Pinging 10.1.10.1 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 10.1.10.1:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

遍历p.stdout，以字符串的形式获取结果的每一行。显然，您可以根据需要忽略此情况，在这种情况下，可以删除text和stdout参数。

使用p.returncode获取返回码。

在我的Windows 10计算机上，ping如果收到答复，则返回0，如果有错误，则返回1。请注意，在尝试对局域网上不存在的地址执行ping操作后收到目标主机不可达响应时，它返回0。尽管我怀疑这将是您的用例的问题。

如果在过程结束之前访问

p.returncode，则会返回None。

您可以通过调用p.wait()方法来等待该过程结束，如下所示：

with subprocess.Popen("ping 192.168.1.1", startupinfo=startupinfo, text=True, stdout=subprocess.PIPE) as p:
    p.wait()
    print("Return code for 192.168.1.1:", p.returncode)
    for line in p.stdout:
        print(line, end="") # This will now all print immediately, after waiting for the process to finish

输出：

Return code for 192.168.1.1: 0

Pinging 192.168.1.1 with 32 bytes of data:
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

或者您可以在p.returncode语句之后访问with，如下所示：

with subprocess.Popen("ping 10.1.10.1", startupinfo=startupinfo, text=True, stdout=subprocess.PIPE) as p:
    for line in p.stdout:
        print(line, end="")
print("Return code for 10.1.10.1:", p.returncode)

输出：

Pinging 10.1.10.1 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 10.1.10.1:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Return code for 10.1.10.1: 1

在我的局域网上ping不存在的地址会返回0：

with subprocess.Popen("ping 192.168.1.99", startupinfo=startupinfo, text=True, stdout=subprocess.PIPE) as p:
    for line in p.stdout:
        print(line, end="")
print("Return code for 192.168.1.99:", p.returncode)

输出：

Pinging 192.168.1.99 with 32 bytes of data:
Reply from 192.168.1.105: Destination host unreachable.
Reply from 192.168.1.105: Destination host unreachable.
Reply from 192.168.1.105: Destination host unreachable.
Reply from 192.168.1.105: Destination host unreachable.

Ping statistics for 192.168.1.99:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Return code for 192.168.1.99: 0

Ping无效的URL返回1：

with subprocess.Popen("ping www..com", startupinfo=startupinfo, text=True, stdout=subprocess.PIPE) as p:
    for line in p.stdout:
        print(line, end="")
print("Return code for www..com:", p.returncode)

输出：

Ping request could not find host www..com. Please check the name and try again.
Return code for www..com: 1

在代码执行期间最小化CMD窗口

1 个答案: