In Python you can create an abstract class using library, but by default there are not any mechanisms to provide abstract classes. A class is called abstract if it has abstract methods, an abstract method has not any definition , definition should be implemented by the child class which inherits it. See the example below […]
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Python is an object-oriented language and a class can have properties and methods. In this post, I will create a simple class having a constructor __init__() and four methods namely mysum(), mymul(), mydiv() and mysub(). Moreover, they compute addition of two numbers, multiplication of two numbers, division of a number by another and subtraction of
Mathematical Operations in Python using Object-Oriented Programming in Python Read More »
An array in Java is a collection of values having contiguous memory locations and share a common name. Suppose you want to create an array of five numbers having data type integer and array name in num. So, first you need to declare as int num[]; Second, you need to allocate memory using new operator
Generators in Python are like ordinary function the difference that it contains yield statement instead of return. Furthermore, when a function encounters an yield statement it pauses execution of function and saves the state of the function. And when function is called again it starts from the next statement where it was paused. See the
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Suppose that in Python you want to expand an expression (x+y)2 to x2 + y2 + 2 xy, this can be done using sympy library in Python, first of all see a simple program. from sympy import * x = Symbol(‘x’) y = Symbol(‘y’) z=(x + y)**2 print(expand(z)) Output:- x**2 + 2*x*y + y**2 How
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Not only variables but a list can also be passed and manipulated in a Python’s function. If you want to read about function read the post User Defined Functions in Python and want to know about list see post List in Python . Further, I will demonstrate how to pass a list as
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If value of a parameter is already known then you can assign default values to a Python function’s parameter. Further, the default values can be specified in the function header. For example, def sum(x, y, z=15): s=x+y+z return s In the above program, value of parameter z is 15. If in program, function call sum(20,
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Array in PHP- In PHP, there are three types of arrays , and array() function is used to create an array in PHP. 1- Indexed or Numeric Array- In a numeric or an indexed array elements of an array are indexed with numeric values. For example, if you define an array ar with the elements
Dictionary in Python is a very important data-structure which can have elements in the form of of key value pairs key:value. Moreover, dictionary also provides different methods to manipulate. In this post, I will explain methods which will work on dictionary. If you use print(dir(dict)) Then you will see the output. The above output
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Dictionary in Python is a very important data-structure which can have unordered list of key value pairs. See a dictionary d={2:4, 3:9, 4:16, ‘India’:’Delhi’} In dictionary d, you can key:value pairs this is one of the ways to create a dictionary. However, there are several ways to create a dictionary using dict() function. In this
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