Is it possible to call parent class without its instance creation in Python?
Yes, it is possible if the base class is instantiated by other child classes or if the base class is a static method.
What are accessors, mutators, and @property?
Python | accessors, mutators, and @property What we call getters and setters in languages like Java, we term accessors and mutators in Python. In Java, if we have a user-defined class with the property ‘x’, we …
Set path and environment variables in Windows 10
Windows | Set path and environment variables in Windows 10 Press the + to access the Power User Task Menu. Now, select the System option. In the About window, click the Advanced system settings link under Related settings from the right side. In the Advanced tab, click the button. In …
What is yield in Python?
yield is a keyword beares the ability to turn any function into a generator. Much like the standard return keyword, but returns a generator object. It is also true that one function may observe multiple …
Program to count the number of capital letters in a file?
Python program to count the number of capital letters in a file. with open(FILE_NAME) as my_file: count = 0 text = my_file.read() for character in text: if character.isupper(): count += 1 print(count)
Is Django better than Flask?
Django is a framework that allows you to build large projects. On the other hand, Flask is used to build smaller websites but flask is much easier to learn and use compared to Django. Django is …
Are access specifiers used in python?
Python | Access Specifiers Python does not make use of access specifiers specifically like private, public, protected, etc. However, it does not derive this from any variables. It has the concept of imitating the behavior of …
What is a map function in Python?
Python | map() Function The map() function executes a specified function for each item in an iterable. The map() function in Python has two parameters, function and iterable. The map() function takes a function as an argument and …
Set up environment variables in Django
Django | Set up environment variables in Django 1. Install Django Environ In your terminal, inside the project directory, type: $ pip install django-environ 2. Import environ in settings.py import environ 3. Initialise environ …
What is the Dogpile effect?
Python | Dogpile effect In case the cache expires, what happens when a client hits a website with multiple requests is what we call the dogpile effect. To avoid this, we can use a semaphore lock. When …
Explain context manager. Can you write your own context manager example?
Python | context manager Context managers allow you to allocate and release resources precisely when you want to. The most widely used example of context managers is the with() statement. with open('some_file', 'w') as opened_file: opened_file.write('Hola!') The …
What is a model in Django?
Django | Model A model is a Python class in Django that is derived from the django.db.models.Model class. A model is used in Django to represent a table in a database. It is used to interact …
What is main function in python? How do you invoke it?
Python | Main Function In the world of programming languages, the main is considered as an entry point of execution for a program. But in python, it is known that the interpreter serially interprets the file …
Write a code to match a string that has the letter ‘a’ followed by 4 to 6 'b’s.
We can use the python re module to match the string import re def check(txt): # regex pattern pattern = 'ab{4,8}' if re.search(pattern, txt): print('Match found') else: print('Match not found') check("abcbbbb") # Match not found check("aabbbbbc") # …
What does [::-1] do?
[::-1] is used to inverse the order of a sequence. >>> my_list = [1,2,3,5,6,7,8,9] >>> my_list[::-1] [9, 8, 7, 6, 5, 3, 2, 1]