Python | Check the memory usage of  an object >>> import sys >>> x = 100 >>> print(sys.getsizeof(x)) 28  

Python | Print String N times >>> s = 'Python' >>> n = 5 >>> print(s * n) PythonPythonPythonPythonPython  

Python | Return multiple values from functions >>> def A(): return 2, 3, 4 >>> a, b, c = A() >>> print(a, b, c) 2 3 4  

Python | Join all items of a list to convert into a single string >>> x = ["Python", "Online", "Training"] >>> print(" ".join(x)) Python Online Training  

Python | Reversing a String >>> x = 'PythonWorld' >>> print(x[: : -1]) dlroWnohtyP  

 Python | In-place swapping of two numbers >>> a, b = 10, 20 >>> print(a, b) 10 20 >>> a, b = b, a >>> print(a, b) 20 10  

A few common security issues that can be avoided by using Django are: Clickjacking Cross-site scripting and SQL injection

Difference between Python array and Python list Array Lists it is used to store only homogeneous data. The list is used to store heterogeneous data it occupies less amount of memory as the array stores …

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)    

Python | Inheritance  Inheritance is a process by which a class can inherit the methods and properties of another class. The concept of inheritance provides the idea of reusability. The class from which we are inheriting is …

[::-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]    

Python | ‘is’, ‘not’, and ‘in’ operators is: Returns True if both variables are the same object >>> x = 5 >>> y = 5 >>> z = 1 >>> x is y True >>> x …

The .py files are the python source code of a program. While the .pyc files contain the bytecode of the python files. We get bytecode after compilation of .py file (source code). The .pyc files are not …

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") # …

We can use the Counter method from the collections module from collections import Counter dict1 = {'a': 5, 'b': 3, 'c': 2} dict2 = {'a': 2, 'b': 4, 'c': 3} new_dict = Counter(dict1) + Counter(dict2) …