Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
If there is a need to find 10 most frequent words in a data set, python can help us find it using the collections module. The collections module has a counter class which gives the count of the words after we supply a list of words to it. We also use the most_common method to find out the number of such words as needed by the program input.ExamplesIn the below example we take a paragraph, and then first create a list of words applying split(). We will then apply the counter() to find the count of all the words. Finally ... Read More
A list is a collection data type in Python. The elements in a list are change able and there is no specific order associated with the elements. In this article we will see how to find the length of a list in Python. Which means we have to get the count of number of elements present in the list irrespective of whether they are duplicate or not.ExamplesIn the below example we take a list named as "days". We first find the length of the list using len() function. And then we add few more elements and check the length again ... Read More
String is a python which is a series of Unicode characters. Once declared it is not changeable. In this article we'll see what are the different ways to find the length of a string.Using the len()This is the most straight forward way. Here we use a library function named len(). The string is passed as parameter to the function and we get a count of characters in the screen.Examplesstr ="Tutorials" print("Length of the String is:", len(str))OutputRunning the above code gives us the following result −Length of the String is: 9Using SlicingWe can use the string slicing approach to count the ... Read More
Extracting only the numbers from a text is a very common requirement in python data analytics. It is done easily using the python regular expression library. This library helps us define the patterns for digits which can be extracted as substrings.ExamplesIn the below example we use the function findall() from the re module. The parameters to these function are the pattern which we want to extract and the string from which we want to extract. Please note with below example we get only the digits and not the decimal points or the negative signs.import re str=input("Enter a String with numbers: ... Read More
In any programming language we find a situation where exceptions are raised. Python has many inbuilt exception handling mechanisms. There are errors which are handled by this exception names. Python also has a block called finally which is executed irrespective of whether the exception is handled or not.Syntaxtry: # main python Code.... except: # It is optional block # Code to handle exception finally: # This Code that is always executedExampleIn the below code we see an exception called NameError. Here we create a code which refers to undeclared variables. Even though the exception is handled ... Read More
Lists are the most frequently used data structures of python. When we want to add more elements to a list, the extension of list happens. This can be done in following 5 different ways.Using the Plus operatorHere we simply add the elements of a new list using the + operator. The behavior is similar to how we modify the values of a variable.Exampleslist = ['Mon', 'Tue', 'Wed'] list = list + ['Thu', 'Fri'] print(list)OutputRunning the above code gives us the following result −['Mon', 'Tue', 'Wed', 'Thu', 'Fri']Using SlicingWe can use slicing to add elements at the end of a list. ... Read More
The divmod() is part of python’s standard library which takes two numbers as parameters and gives the quotient and remainder of their division as a tuple. It is useful in many mathematical applications like checking for divisibility of numbers and establishing if a number is prime or not.SyntaxSyntax: divmod(a, b) a and b : b divides a a and b are integers or floatsExamplesIn the below example see the cases of both integers and floats. On the application of divmod() they give us a resulting tuple which is can also contain integers and float values.# with integers print("5 and 2 ... Read More
Clearing up all the elements in a python list can be done in many ways. Below are the some of the methods which are implemented to achieve this.using clear()This function is a part of standard library and empties the python list completely.Syntax: list_name.clear() list_name is the name of the list supplied byExampleIn the below example we take a list and apply the clear (). The result is an empty list.list = ['Mon', 'Tue', 'Wed', 'Thu'] print("Existing list", list) #clear the list list.clear() print("After clearing the list") print(list)OutputRunning the above code gives us the following result −Existing list ['Mon', 'Tue', 'Wed', ... Read More
In this article, we will learn about Logic Gates in Python. Let’s look at each of the logic gates in Python in detail with some easy examples.All of us are quite familiar while implementing logic gates in the processing of electrical signals and are widely used in the electrical and electronics industry. They are used in the diodes and transistors so that we can design by proper alignment of these electronic devices. In this article we will learn about the implementation of some basic gates ‘and‘, ‘or‘ ,’not‘ , ‘nand‘ ,’nor‘ in Python 3.x or earlier.These gates can be implemented ... Read More
These two functions are used to remove attributes from classes. The delattr() allows dynamoc deletion of attribute while the del() is more efficient explicit in deleting the attribute.Using delattr()Syntax: delattr(object_name, attribute_name) Where object name is the name of the object, instantiated form the class. Attribute_name is the name of the attribute to be deleted.ExampleIn the below example we consider a class named custclass. It has the id of the customers as its attributes. Next we instantiate the class as an object named customer and print its attriutes.class custclass: custid1 = 0 custid2 = 1 custid3 = 2 ... Read More