我想在 Django 中使用 .py 文件，但遇到了一些问题我是全新的，需要一些解决方案

Question

我制作了一个 python 脚本来查找给定数量的主机的子网掩码。但我希望它在单击按钮时接受 HTML 输入，并将其作为用户输入传递到 python 脚本中，并在同一 HTML 页面上提供输出。我已经尝试向你们提供该程序的最大详细信息我无法理解这个问题。它显示在 url 中输入，就像这里一样，终端输出用于输入 500

urls.py

path('findSM_H', views.findSM_H, name='findSM_H'),
   path('findSM_Houtput', views.findSM_Hexecution, name='findSM_Houtput')

findSM_H.html

<form method="GET" action="/findSM_H">
    {% csrf_token %}
    <table>
        <tbody>
            <tr>
                <td width="450">
                    <table width="450">
                        <tbody>
                            <tr>
                                \TAKING INPUT FROM THE USER
                                <td width="250" height="50">
                                    <label for="noofhostinput"> Number of host </label>
                                </td>
                                <td width="250" height="50">
                                    //ON CLICKING THE BUTTON IT TAKES TO 'findSM_Houtput' FUNCTION
                                    <input id="noofhostinput" type="text" name="noofhostinput" />
                                        <input type="submit" onclick="location.href ='{%url 'findSM_Houtput'%}'" >
                                </td>
                            </tr>
                        </tbody>
                    </table>
                </td>
                <td width="30"></td>
                <td width="450">
                    <table width="450">
                        <tbody>
                            <tr>
                                <td width="250" height="50">
                                    //OUTPUT OF THE USER INPUT
                                    <label for="subnetmask"> Subnet mask </label>
                                </td>
                                <td width="200" height="50">
                                    <div  id="subnetmask" style="background-color: ddb(39, 6, 39)" type="text">
                                       00{{noofhost_op}}
                                    </div>
                                    <h3>0.{{noofhost_op}}</h3>
                                </td>
                            </tr>
                            
                                </td>
                            </tr>
                        </tbody>
                    </table>
                </td>
            </tr>
        </tbody>
    </table>
    </form>

views.py

def findSM_H(request):
    return render(request, 'findSM_H.html')

def findSM_Hexecution(request):
    noofhost_input = request.GET.get("noofhostinput")
    noofhost_output = run([sys.executable, 'D:\Network_Project\NetworkTools\use_host_to_find_subnet_Mask_with_value.py',
                          noofhost_input], shell=False, stdout=PIPE)
    print(noofhost_output)

    return render(request, 'findSM_H.html', {'noofhost_op': noofhost_output})

use_host_to_find_subnet_Mask_with_value.py

import sys


noofhostinput="%s" % (sys.argv[1])
usr = int(noofhostinput)

table = [1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,
32768,65536,131072,262144,524288,1048576,2097152,4194304,8388608,16777216]

for i in table:
    if usr < i:
        n = table.index(i)
        break       
csm = 32- n
if csm >=8 or csm<33:
    sm={'8':'255.0.0.0',
        '9':'255.128.0.0',
        '10':'255.192.0.0',
        '11':'255.224.0.0',
        '12':'255.240.0.0',
        '13':'255.248.0.0',
        '14':'255.252.0.0',
        '15':'255.254.0.0',
        '16':'255.255.0.0',
        '17':'255.255.128.0',
        '18':'255.255.192.0',
        '19':'255.255.224.0',
        '20':'255.255.240.0',
        '21':'255.255.248.0',
        '22':'255.255.252.0',
        '23':'255.255.254.0',
        '24':'255.255.255.0',
        '25':'255.255.255.128',
        '26':'255.255.255.192',
        '27':'255.255.255.224',
        '28':'255.255.255.240',
        '29':'255.255.255.248',
        '30':'255.255.255.252',
        '31':'255.255.255.254',
        '32':'255.255.255.255'}
    for i in range(8,33):
        if i == csm:
            j= str(i)
            output = f'your subnet mask for {usr} Host is {sm[j]}/{csm}'
            print(output)
else:

    output="your value is out of range of valid subnet mask."
    print(output)

终端日志

[14/Feb/2022 05:45:30] "GET /findSM_H?csrfmiddlewaretoken=4SK8zRYZkwzVYb8RP80A8Wu3tILyhJGejbsAfKTHUAh9VgjGMfDdFjtSVFLexTlD&noofhostinput=500 HTTP/1.1" 200 4868Internal Server Error: /findSM_Houtput
Traceback (most recent call last):
  File "C:\Users\NIRMAL\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "C:\Users\NIRMAL\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "D:\Network_Project\NetworkTools\NetworkApps\views.py", line 24, in findSM_Hexecution
    noofhost_output = run([sys.executable, 'D:\Network_Project\NetworkTools\use_host_to_find_subnet_Mask_with_value.py',
  File "C:\Users\NIRMAL\AppData\Local\Programs\Python\Python39\lib\subprocess.py", line 505, in run
    with Popen(*popenargs, **kwargs) as process:
  File "C:\Users\NIRMAL\AppData\Local\Programs\Python\Python39\lib\subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "C:\Users\NIRMAL\AppData\Local\Programs\Python\Python39\lib\subprocess.py", line 1360, in _execute_child
    args = list2cmdline(args)
  File "C:\Users\NIRMAL\AppData\Local\Programs\Python\Python39\lib\subprocess.py", line 565, in list2cmdline
    for arg in map(os.fsdecode, seq):
  File "C:\Users\NIRMAL\AppData\Local\Programs\Python\Python39\lib\os.py", line 822, in fsdecode
    filename = fspath(filename)  # Does type-checking of `filename`.
TypeError: expected str, bytes or os.PathLike object, not NoneType
[14/Feb/2022 05:45:30,806] - Broken pipe from ('127.0.0.1', 49451)

伙计们，这里出了什么问题，django 想说什么？任何建议都会有所帮助

Answer 1

您可以在从浏览器提交时检查 noofhost_input 是否为空，因为我认为您的表单输入提交操作已被覆盖（见下文）：

def findSM_Hexecution(request):
    noofhost_input = request.GET.get("noofhostinput")
    print("******",noffhost_input,"*****")
    noofhost_output = run([sys.executable, 'D:\Network_Project\NetworkTools\use_host_to_find_subnet_Mask_with_value.py',
                          noofhost_input], shell=False, stdout=PIPE)
    print(noofhost_output)

我想 noffhost_input 是空的，因为 onclick 定义覆盖了表单操作但没有提交表单的输入字段值。

<input type="submit" onclick="location.href ='{%url 'findSM_Houtput'%}'"

顺便说一句：表单操作指向另一个地址。解决方案是删除 onclick... 并将表单操作指向 findSM_Houtput.

我想在 Django 中使用 .py 文件，但遇到了一些问题我是全新的，需要一些解决方案

I want to use the .py file in Django but faced some issues I'm totally new and need some solution

python

django

django-templates

django-forms

django-views