Tuesday, February 1, 2022

Re: how to Display images other than from static folder.

still, I'm confused, Guide me what to write in views.py to display images on my HTML page. 
the main problem is how to set this path in views.py file to get image from this path. I jst want to display this tree.pdf file on my html page. 
Any one tell me what to write in views.py?
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    filename = 'Tree.pdf'
    filepath = BASE_DIR + '//' + filename
    path = open(filepath, 'rb')

On Mon, Jan 31, 2022 at 9:00 PM ramsha azhar <ramshaazhar12@gmail.com> wrote:
yes, I set check the attached settings.py file
 just want to know In template page how I set the path od back directory folder where tree.png is placed.

On Mon, Jan 31, 2022 at 8:55 PM DJANGO DEVELOPER <abubakarbryar@gmail.com> wrote:
have you set up the static files in settings.py ?

On Mon, Jan 31, 2022 at 8:49 PM ramsha azhar <ramshaazhar12@gmail.com> wrote:
I just want to display the attached Tree.png image on the HTML page but this image is created each time new according to the user input file. guide me how to set the path of this mage on an HTML page or how to display this tree.png as a user output image.

On Mon, Jan 31, 2022 at 8:36 PM DJANGO DEVELOPER <abubakarbryar@gmail.com> wrote:
tell me what you want to get as a result? do you want to display multiple images on HTML template?

On Mon, Jan 31, 2022 at 8:27 PM ramsha azhar <ramshaazhar12@gmail.com> wrote:
So guide me the write way ... 

On Mon, 31 Jan 2022, 7:45 pm DJANGO DEVELOPER, <abubakarbryar@gmail.com> wrote:
you are doing it the wrong way. totally the wrong way. I am not being rude.

On Mon, Jan 31, 2022 at 7:42 PM ramsha azhar <ramshaazhar12@gmail.com> wrote:
Gide me Django develpers. I just want to display my pictures that are created each time new.
My mages are created in my project folder, not in the static folder.
how I display images on the HTML page by using the path of my project folder.

views.py

def Image_display(request):
  BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
  filename = 'Tree.jpg'
  filepath = BASE_DIR + '//' + filename
  images = Image.objects.all('filepath')
  return render(request, "xyz.html", {'images': images})

url.py
path('Image_display/', views.Image_display, name="Image_display"),

HTML page
<img src="/Image_display/" alt="" class="img">
<img src="/Image_display/" alt="" class="img">
<img src="/Image_display/" alt="" class="img">
<img src="/Image_display/" alt="" class="img">

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Re: Barcode


On Wed, 2 Feb 2022, 01:08 Alen Zuvic, <punakapa32@gmail.com> wrote:

On Wed, 2 Feb 2022, 01:05 Andres Quilindo, <andres.quilindo@uaiinpebi-cric.edu.co> wrote:
Does anyone have experience with UCC/EAN-128 barcodes? I am using a javascript barcode js library with django to implement the barcode but it is generating errors when reading if anyone knows any library or api that can be used that complies with the UCC/EAN-128 parameters that can provide me with information

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Barcode

Does anyone have experience with UCC/EAN-128 barcodes? I am using a javascript barcode js library with django to implement the barcode but it is generating errors when reading if anyone knows any library or api that can be used that complies with the UCC/EAN-128 parameters that can provide me with information

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Resource leaks from FieldFile's implicit open?

Dear group,

despite a lot of reading and searching I still don't understand how FieldFiles work.

The documentation at https://docs.djangoproject.com/en/4.0/ref/models/fields/#django.db.models.fields.files.FieldFile says:

> The API of FieldFile mirrors that of File, with one key difference: The object wrapped by the class is not necessarily a wrapper around Python's built-in file object. Instead, it is a wrapper around *** the result of the Storage.open() method ***, which may be a File object, or it may be a custom storage's implementation of the File API.

(I added markers to indicate the portion that I have trouble with.)

As far as I understand this, whenever a `FieldFile` is instantiated, `Storage.open()` is called. Thus, if the underlying storage is the `FileSystemStorage`, a Python file object is opened.

However, how is this file handle closed again?

It looks as if it stays open until garbage collected, that is, possibly for a very long time.

Another consequence besides the potential resource leak seems to be that the implicit open will raise an exception if the file that the `FieldFile` refers to doesn't exist. As I don't exactly understand when this opening occurs, a lot of code must be wrapped in try-except blocks to handle this?

Best regards,
Carsten

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Re: Downloading html as pdf using popen, headless chrome option

@Jisson Varghese Thank you very much it worked completely fine now

On Tuesday, February 1, 2022 at 11:39:22 PM UTC+5:30 jis...@gmail.com wrote:
Check whether FileResponse instead of StreamingHttpResponse helps to solve the issue , https://docs.djangoproject.com/en/4.0/ref/request-response/#fileresponse-objects

On Tue, Feb 1, 2022 at 11:26 PM Aadil Rashid <aadil1...@gmail.com> wrote:
I am trying to generating pdf from webpages, using popen , but when i call this
view it generates UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd3 in position 10: invalid continuation byte

This is my view
from projName.settings import BASE_DIR
from subprocess import Popen, PIPE, STDOUT
from wsgiref.util import FileWrapper
from django.http import StreamingHttpResponse

class DownloadAsPDF(View):
def post(self, request, *args, **kwargs):
base = str(BASE_DIR)
file_name = str( base + '/testreport.pdf')
post_url = request.POST.get("page_url")
url = str('http://' + request.get_host() + post_url)
chrome_args = ['/path/google-chrome', '--headless', '--virtual-time-buget=20000',
'--print-to-pdf=/path/testreport.pdf', url]
external_process = Popen(chrome_args, stdout=PIPE, stderr=STDOUT)
external_process.wait()
return_file = FileWrapper(open('{}'.format(file_name), 'r'))
download_file_name = 'report'
response = StreamingHttpResponse(return_file, content_type='application/force-download')
response['Content-Disposition'] = f'attachment; filename= {download_file_name}.pdf'
return response


Can please anybody, tell me why is it generating this error and what is the possible solution
this problem, Thanks you very much

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Re: Downloading html as pdf using popen, headless chrome option

Check whether FileResponse instead of StreamingHttpResponse helps to solve the issue , https://docs.djangoproject.com/en/4.0/ref/request-response/#fileresponse-objects

On Tue, Feb 1, 2022 at 11:26 PM Aadil Rashid <aadil10121998@gmail.com> wrote:
I am trying to generating pdf from webpages, using popen , but when i call this
view it generates UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd3 in position 10: invalid continuation byte

This is my view
from projName.settings import BASE_DIR
from subprocess import Popen, PIPE, STDOUT
from wsgiref.util import FileWrapper
from django.http import StreamingHttpResponse

class DownloadAsPDF(View):
def post(self, request, *args, **kwargs):
base = str(BASE_DIR)
file_name = str( base + '/testreport.pdf')
post_url = request.POST.get("page_url")
url = str('http://' + request.get_host() + post_url)
chrome_args = ['/path/google-chrome', '--headless', '--virtual-time-buget=20000',
'--print-to-pdf=/path/testreport.pdf', url]
external_process = Popen(chrome_args, stdout=PIPE, stderr=STDOUT)
external_process.wait()
return_file = FileWrapper(open('{}'.format(file_name), 'r'))
download_file_name = 'report'
response = StreamingHttpResponse(return_file, content_type='application/force-download')
response['Content-Disposition'] = f'attachment; filename= {download_file_name}.pdf'
return response


Can please anybody, tell me why is it generating this error and what is the possible solution
this problem, Thanks you very much

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--
Jisson Varghese

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Re: TypeError: 'module' object is not iterable - django 4

Issue was sorted..
Here is the link.

On Monday, January 31, 2022 at 11:53:03 AM UTC+3 muwaga micheal wrote:
Hi 
Team,
 I am getting the above error, it has persisted long enough than at this point i really need help.
I am using pickle to load an ML model, POST to get user input. Below is the error, my urls.py file and the views.py file. 
Any Help will be highly appreciated.

******* Error Message *******

(python10_env) D:\Online Drives\MDigital\CIT-Letures\python10_env\smart_health_consult>python manage.py runserver
Watching for file changes with StatReloader
Performing system checks...

Exception in thread django-main-thread:
Traceback (most recent call last):
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\urls\resolvers.py", line 634, in url_patterns
    iter(patterns)
TypeError: 'module' object is not iterable

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\USER\AppData\Local\Programs\Python\Python310\lib\threading.py", line 1009, in _bootstrap_inner
    self.run()
  File "C:\Users\USER\AppData\Local\Programs\Python\Python310\lib\threading.py", line 946, in run
    self._target(*self._args, **self._kwargs)
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
    fn(*args, **kwargs)
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\core\management\commands\runserver.py", line 124, in inner_run
    self.check(display_num_errors=True)
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\core\management\base.py", line 438, in check
    all_issues = checks.run_checks(
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\core\checks\registry.py", line 77, in run_checks
    new_errors = check(app_configs=app_configs, databases=databases)
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\core\checks\urls.py", line 40, in check_url_namespaces_unique
    all_namespaces = _load_all_namespaces(resolver)
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\core\checks\urls.py", line 67, in _load_all_namespaces
    namespaces.extend(_load_all_namespaces(pattern, current))
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\core\checks\urls.py", line 57, in _load_all_namespaces
    url_patterns = getattr(resolver, 'url_patterns', [])
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "D:\Online Drives\MDigital\CIT-Letures\python10_env\lib\site-packages\django\urls\resolvers.py", line 642, in url_patterns
    raise ImproperlyConfigured(msg.format(name=self.urlconf_name)) from e
django.core.exceptions.ImproperlyConfigured: The included URLconf '<module 'ml_dp_model.urls' from 'D:\\Online Drives\\MDigital\\CIT-Letures\\python10_env\\smart_health_consult\\ml_dp_model\\urls.py'>' does not appear to have any patterns in it. If you see the 'urlpatterns' variable with valid patterns in the file then the issue is probably caused by a circular import.

******************************

****  urls.py  *****
from django.urls import path
from . import views

#from .views import index
#from .views import predict

urlpartterns = [
    path('', views.index, name='index'),    
    path('result.html', views.predict, name='predict')
   
]
******************

********* views.py *********
from django.shortcuts import render
# Testing if context can solve circular refference issue.
from django.template import context
# Model related imports
import pandas as pd #install pandas
import pickle
import numpy as np #  helps to manipulate the data

# Create your views here.
def index(request):
    return render(request, 'index.html')

# importing the models using pickle.
    #Loading Naive Bayes Pickle  Model load method 1
nb_pickle = open('./models_store/final_nb_model.pickel','rb+')
nb_model = pickle.load(nb_pickle)
    #Loading RandomForest Pickle Modal load method 1
rf_pickle = open('./models_store/final_rf_model.pickel', 'rb+')
rf_model = pickle.load(rf_pickle)
    #Loading Scala Vector Machine  Pickle  Model load method 2
svm_model = pickle.load(open('./models_store/final_svm_model.pickel', 'rb+'))

# Disease prediction Function:
def predict(request):
    if request.method=='POST':
        symptom_index = {}
        symptom_index['symptom1'] =float(request.POST.get('symptom1')) # Add data in string format to the dictionary
        symptom_index['symptom2'] =float(request.POST.get('symptom2'))
        symptom_index['symptom3'] =float(request.POST.get('symptom3'))
        user_symptoms = pd.DataFrame({'X':symptom_index}).transpose() #think about changing dictionary to list at this line.
        # Using pickle model() to predict
        nb_prediction = nb_model.predict(user_symptoms)[0]
        rf_prediction = rf_model.predict(user_symptoms)[0]
        svm_prediction = svm_model.predict(user_symptoms)[0]
               
        '''
        Making final prediction by taking mode of all predicitions
        '''
        final_prediction = np.mode([rf_prediction, nb_prediction, svm_prediction])
       
        predicted  =  final_prediction

    return render(request,'result.html',{'results':predicted} )

****************************
 Am running python 3.10  and Django 4.0


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