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AttributeError: module 'matplotlib' has no attribute 'subplots' Description of the issue AttributeError: module 'matplotlib' has no attribute 'subplots' The reason for this When a package for importing data is written, import matplotlib as plt Changes should be made import matplotlib .pyplot as plt

OOP's Constructor

October 25, 2021

The constructor is also a method. No return/keywords such as void, int, float etc, are not used before method name. Constructor name also created using class name . No calling required. Constructoer is automatically called while creating an object. Example 01 - file saveAs cons.java compail command - javac cons.java ↪ java cons ↪ class cons{ public static void main( String [] args){ cons obj = new cons(); } cons(){ System.out.println( 'Hello world' ); } } Example 02 - file saveAs squar.java compail command - javac squar.java ↪ java square ↪ class squar{ public static void main( String [] args){ squar obj1 = new squar( 20 ); } squar( int a){ System.out.println( "Area = " + a*a); } }