Trending questions in Python

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How to Filter for empty or NULL names in a queryset?

Hello @kartik, You could do this: Name.objects.exclude(alias__isnull=True) If you need ...READ MORE

Aug 6, 2020 in Python by Niroj
 • 82,800 points • 5,681 views
0 votes
1 answer

urllib.error.URLError: <urlopen error [Errno -2] Name or service not known>

Hi@akhtar, You need to use the read function in ...READ MORE

Jul 15, 2020 in Python by MD
 • 95,460 points • 6,624 views
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1 answer

How do you use a variable in a regular expression?

Instead of using the /regex/g syntax, you can construct ...READ MORE

Nov 26, 2020 in Python by Gitika
 • 65,730 points • 826 views
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1 answer

How can I get a list of locally installed Python modules?

Do not use with pip > 10.0! My ...READ MORE

Nov 26, 2020 in Python by anonymous
 • 65,730 points • 823 views
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1 answer

How to print prime numbers from 1 to n?

Hello @divyashree def isPrime(n): # ...READ MORE

Oct 13, 2020 in Python by Niroj
 • 82,800 points • 2,749 views
0 votes
1 answer

How can I do not equal in Django queryset filtering?

Hello @kartik, You can use Q objects for this. They ...READ MORE

Nov 17, 2020 in Python by Niroj
 • 82,800 points • 1,199 views
+1 vote
1 answer

'numpy.ndarray' object has no attribute 'append'

Hi@Noman, You created two empty list. And in ...READ MORE

May 17, 2020 in Python by MD
 • 95,460 points • 9,110 views
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0 answers

In python how to extract the common repeated values(Company Name) base particular column getting the relevant rows data(features/parameters)

1. I have a folder with multiple ...READ MORE

Nov 25, 2020 in Python by anonymous
 • 160 points • 861 views
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hello guys i need help to make this code run plz !

H= float (input("Is this circuit charging& ...READ MORE

Nov 25, 2020 in Python by anonymous
 • 120 points • 862 views
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1 answer

What is the difference between visual studio and idle in python programming??

Both are actually IDE-s I don't know ...READ MORE

Oct 16, 2020 in Python by Gitika
 • 65,730 points • 2,530 views
0 votes
1 answer

Deployed Django project on heroku But I don't know which database is it using. Is there a way to know that So that I can login to admin page?

If you don't configure one you might ...READ MORE

Nov 12, 2020 in Python by anonymous
 • 65,730 points • 1,361 views
0 votes
1 answer

How are Python metaclasses different from regular class inheritance?

Python 3 class MyClass(object): = New-style class class MyClass: = New-style ...READ MORE

Nov 20, 2020 in Python by Gitika
 • 65,730 points • 1,000 views
0 votes
1 answer

Can't import scikit -learn on python3.

Hi@akhtar, First, remove the Sklearn form your Windows system ...READ MORE

Jun 23, 2020 in Python by MD
 • 95,460 points • 7,507 views
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1 answer

How to get the current time in Python?

Use: >>> import datetime >>> datetime.datetime.now() datetime.datetime(2009, 1, 6, 15, ...READ MORE

Nov 20, 2020 in Python by Gitika
 • 65,730 points • 993 views
0 votes
1 answer

AssertionError: <class 'numpy.ndarray'>

Hi, @There, The traceback module and sys.exc_info are ...READ MORE

Oct 19, 2020 in Python by anonymous
 • 65,730 points • 2,385 views
0 votes
1 answer

How to overcome “datetime.datetime not JSON serializable”?

Hii @kartik, The simple solution to over come ...READ MORE

Jun 5, 2020 in Python by Niroj
 • 82,800 points • 8,239 views
0 votes
1 answer

How do I get the number of elements in a list?

Hello, The len() function can be used with several different ...READ MORE

Nov 18, 2020 in Python by Niroj
 • 82,800 points • 1,043 views
0 votes
1 answer

ImportError: No module named mpmath. But mpmath has been installed.

You should use conda to install Python ...READ MORE

Nov 4, 2020 in Python by Gitika
 • 65,730 points • 1,671 views
0 votes
1 answer

How to install PyTorch?

Here are the steps you can follow:  Install Python. ...READ MORE

Oct 29, 2020 in Python by Gitika
 • 65,730 points • 1,911 views
0 votes
1 answer

How can I create a nested directory?

Hello, Using try except and the right error ...READ MORE

Nov 18, 2020 in Python by Niroj
 • 82,800 points • 1,009 views
0 votes
1 answer

How to read a HDF file with Pandas?

Hi@akhtar, You can read an HDF file using ...READ MORE

Oct 18, 2020 in Python by MD
 • 95,460 points • 2,378 views
0 votes
1 answer

How to check permission inside a template in Django?

Hello @kartik, To check for permissions in templates, ...READ MORE

Aug 7, 2020 in Python by Niroj
 • 82,800 points • 5,435 views
0 votes
1 answer

Error:Pip install: can't open file pip, or Parent module '' not loaded

Hello @kartik, Assuming you have pip installed and ...READ MORE

Jul 3, 2020 in Python by Niroj
 • 82,800 points • 6,967 views
0 votes
1 answer

Error: Can't import matplotlib library.

Install the older version of python, I also ...READ MORE

Nov 6, 2020 in Python by Gitika
 • 65,730 points • 1,472 views
0 votes
1 answer

How to call an external command?

Look at the subprocess module in the standard library: import ...READ MORE

Nov 19, 2020 in Python by Gitika
 • 65,730 points • 944 views
0 votes
2 answers

How to use in python for loop not equal marks? example: a!=0

Hello @Azizjon, You can go through the example ...READ MORE

Oct 12, 2020 in Python by Gitika
 • 65,730 points • 2,855 views
0 votes
1 answer

How do I parse XML in Python?

Hello @kartik, You can use BeautifulSoup: from bs4 import BeautifulSoup x="""<foo> ...READ MORE

Nov 19, 2020 in Python by Niroj
 • 82,800 points • 912 views
0 votes
2 answers

module 'numpy' has no attribute 'unit8'

Hi@Ganesh, I think you are calling the wrong ...READ MORE

Sep 22, 2020 in Python by MD
 • 95,460 points • 3,367 views
0 votes
1 answer

Why do we not follow the "off by one" rule in python

It's because of the way in which ...READ MORE

Nov 15, 2020 in Python by Gitika
 • 65,730 points • 1,047 views
0 votes
1 answer

Why not inherit from List<T>?

There are some good answers here. I ...READ MORE

Nov 20, 2020 in Python by Gitika
 • 65,730 points • 835 views
0 votes
1 answer

How to concatenate items in a list to a single string?

Hello @kartik, Use join: >>> sentence = ['this','is','a','sentence'] >>> '-'.join(sentence) 'this-is-a-sentence' Hope it ...READ MORE

Nov 17, 2020 in Python by Niroj
 • 82,800 points • 931 views
0 votes
1 answer

ImportError: No module named 'Cython'

Hi@akhtar, You need to install the Cython module ...READ MORE

Jul 13, 2020 in Python by MD
 • 95,460 points • 6,406 views
0 votes
0 answers

how to send post request to a webpage using cookies and headers in python to scrape the webpage ?

Hello I'm trying to scrape webpage  by sending ...READ MORE

Sep 29, 2020 in Python by Avinash
 • 120 points • 3,075 views
+1 vote
1 answer

How to install django in anaconda prompt?

Here are the steps that you can ...READ MORE

Jun 23, 2020 in Python by Sirajul
 • 59,190 points • 7,202 views
0 votes
1 answer

How to call an external command?

Hello @kartik, Look at the subprocess module in the standard ...READ MORE

Nov 18, 2020 in Python by Niroj
 • 82,800 points • 839 views
0 votes
0 answers

How to get output result from selecting two dropdown menu options in tkinter?

if i choose a value from first ...READ MORE

Sep 4, 2020 in Python by Charitra
 • 120 points • 4,129 views
0 votes
1 answer

How to check if a value exists in pandas dataframe index?

Hello @kartik, Basically instead of raising exception I ...READ MORE

Jun 15, 2020 in Python by Niroj
 • 82,800 points • 7,561 views
0 votes
1 answer

How do I list all files of a directory?

Hii, Try this: import os os.listdir("somedirectory") Thank you!! ...READ MORE

Nov 18, 2020 in Python by Niroj
 • 82,800 points • 813 views
0 votes
1 answer

How do I get user IP address in django?

Hii Kartik, check uwsgi + django source code and pass static param ...READ MORE

Apr 23, 2020 in Python by Niroj
 • 82,800 points • 9,826 views
0 votes
1 answer

Error: showing database is locked

ah, sqlite3 stuff... remove .session file and ...READ MORE

Nov 15, 2020 in Python by Sheema
 • 921 views
0 votes
1 answer

Tried setting up Django-shop on my system, but when I try to run pipenv install , I get this:404 Snippet not found

Uninstall all python first then install python ...READ MORE

Nov 12, 2020 in Python by Gitika
 • 65,730 points • 1,048 views
0 votes
1 answer

ImportError: No module named django_extensions

Hello @kartik, You can solve this error by ...READ MORE

Jun 25, 2020 in Python by Niroj
 • 82,800 points • 7,097 views
0 votes
1 answer

How to generate a string token using four of this items random?

One approach just generates random integers up ...READ MORE

Nov 16, 2020 in Python by Gitika
 • 65,730 points • 907 views
0 votes
1 answer

how to fetch user details and send it to his email address using django rest framework

Hello @mahesh, First you have to fetch user ...READ MORE

Aug 18, 2020 in Python by Niroj
 • 82,800 points • 4,757 views
0 votes
1 answer

How to test multiple variables against a value?

Hello @kartik, Your problem is more easily addressed ...READ MORE

Nov 17, 2020 in Python by Niroj
 • 82,800 points • 817 views
0 votes
1 answer

How to print error in web browser if there is error in code?

You can try to catch these errors ...READ MORE

Nov 6, 2020 in Python by Gitika
 • 65,730 points • 1,279 views
0 votes
1 answer

How to connect my app to mongo?

Most users try to use NoSQL-like DBs ...READ MORE

Nov 12, 2020 in Python by Gitika
 • 65,730 points • 1,001 views
0 votes
1 answer

How do I pass a variable by reference?

Hello, Just wrap it in a list: def Change(self, ...READ MORE

Nov 18, 2020 in Python by Niroj
 • 82,800 points • 739 views
0 votes
1 answer

How to do math in a Django template?

Hello @kartik, You can use the add filter: {{ object.article.rating_score|add:"-100" }} Thank ...READ MORE

Jun 23, 2020 in Python by Niroj
 • 82,800 points • 7,127 views
0 votes
1 answer

How to access environment variable values?

Hello @kartik, To check if the key exists ...READ MORE

Nov 18, 2020 in Python by Niroj
 • 82,800 points • 724 views
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