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Articles by Hafeezul Kareem
Page 13 of 26
Python - Intersect two dictionaries through keys
In this article, we are going to learn how to intersect two dictionaries using keys. We have to create a new dictionary with common keys. Let's see an example.Input: dict_1 = {'A': 1, 'B': 2, 'C': 3} dict_2 = {'A': 1, 'C': 4, 'D': 5} Output: {'A': 1, 'C': 3}We are going to use the dictionary comprehension to solve the problem. Follow the below steps to write the code.Initialize dictionaries.Iterate over the dictionary one and add elements that are not in dictionary two.Print the result.Example# initializing the dictionaries dict_1 = {'A': 1, 'B': 2, 'C': 3} dict_2 = {'A': ...
Read MorePython - Inserting item in sorted list maintaining order
In this article, we are going to learn how to insert an item in a sorted list maintaining the order. Python has a built-in module called bisect that helps us to insert any element in an appropriate position in the list.Follow the below steps to write the code.Import the module bisect.Initialize list and element that need to insertThe module bisect has a method called insort that inserts an element into a list in an appropriate position. Use the method and insert the element.Print the list.Example# importing the module import bisect # initializing the list, element numbers = [10, 23, ...
Read MorePython Grouping similar substrings in list
In this tutorial, we are going to write a program that groups similar substrings from a list. Let's see an example to understand it more clearly.Inputstrings = ['tutorials-python', 'tutorials-c', 'tutorials-java', 'tutorials-javascript', 'python-1', 'python-2', 'javascript-1']Output[['tutorials-python', 'tutorials-c', 'tutorials-java', 'tutorials-javascript'], ['python-1', 'python-2'], ['javascript-1']]We are going to use the groupby method from itertools module to solve the problem. The groupby method will group all the similar string into an iter object. For the given list we have split the string with - and pass the first part of the string to the groupby method.Let's see the steps involved in solving this problem.Initialize the list ...
Read MorePython Index specific cyclic iteration in list
In this tutorial, we are going to write a program that cyclically iterates a list from the given Let's see the steps to solve the problemInitialize the list and index.Find the length of the list using len.Iterate over the list using the length.Find the index of the element using index % length.Print the element.Increment the index.It's a simple loop iteration. You can write it without any trouble. Let's see the code.Example# initializing the list and index alphabets = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'] start_index = 5 # finding the length length = len(alphabets) # iterating over the ...
Read MorePython Indexing a sublist
In this tutorial, we are going to write a program that finds the index of a sublist element from the list. Let's see an example to understand it clearly.Inputnested_list = [[1, 2, 3], [4, 5], [6, 7, 8, 9]]OutputIndex of 7:- 2 Index of 5:- 1 Index of 3:- 0Let's see the simple and most common way to solve the given problem. Follow the given steps solve it.Initialize the list.Iterate over the list using the index.Iterate over the sub list and check the element that you want to find the index.If we find the element then print and break itExample# ...
Read MorePython How to copy a nested list
In this tutorial, we are going to see different ways to copy a nested list in Python. Let's see one by one.First, we will copy the nested list using loops. And it's the most common way.Example# initializing a list nested_list = [[1, 2], [3, 4], [5, 6, 7]] # empty list copy = [] for sub_list in nested_list: # temporary list temp = [] # iterating over the sub_list for element in sub_list: # appending the element to temp list temp.append(element) # appending the temp list to copy ...
Read Moreself in Python class
In this tutorial, we are going to learn about the self in Python. You must be familiar with it if you are working with Python. We will see some interesting things about.Note − self is not a keyword in Python.Let's start with the most common usage of self in Python.We'll use self in classes to represent the instance of an object. We can create multiple of a class and each instance will have different values. And self helps us to get those property values within the class instance. Let's see ane example.Example# class class Laptop: # init method ...
Read MoreSet update() in Python to do union of n arrays
In this tutorial, we are going to write a program that uses set update method to union multiple arrays. And it will return a resultant one-dimension array with all unique values from the arrays.Let's see an example to understand it more clearly.Let's see an example to understand it more clearly.Inputarrays = [[1, 2, 3, 4, 5], [6, 7, 8, 1, 2, 3, 4, 5], [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]]Output[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]Follow the below steps to write the program.Initialize the array as shown in the example.3Create an empty.Iterate over ...
Read MoreSplit a string in equal parts (grouper in Python)
In this tutorial, we are going to write a program that splits the given string into equal parts. Let's see an example.Inputstring = 'Tutorialspoint' each_part_length = 5OutputTutor ialsp ointXInputstring = 'Tutorialspoint' each_part_length = 6OutputTutori alspoi ntXXXX We are going to use the zip_longest method from the itertools module to achieve the result.The method zip_longest takes iterators as argument. We can also pass the fillvalue for partitioning the string. It will return list of tuples that contains characters of equal number.The zip_longest return a tuple on each iteration until the longest iterator in the given in exhausted. And the tuple contains ...
Read Morestring.octdigits in Python
In this tutorial, we are going to learn about the string.octdigits string.The string octdigits is pre-defined in the string module of the Python3. We can use the octal digits whenever we want in the program by simply accessing it from the string module.Example# importing the string module import string # printing the octal digits string print(string.octdigits)OutputIf you run the above code, then you will get the following result.01234567The string.octdigits is a string. You can it by executing the following program.Example# importing the string module import string # printing the octal digits string print(type(string.octdigits))OutputIf you run the above code, then you ...
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