Added : exercises for 16 to 26

Author: d_p_beladiya

Basics/python_basics/16_class_and_objects/16_class_and_objects.py

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+class Employee:  
+    
+    def __init__(self,id,name):
+        self.id=id
+        self.name=name
+  
+    def display(self):  
+        print("ID: %d \nName: %s" % (self.id, self.name))  
+
+# Creating a emp instance of Employee class    
+emp = Employee(1,"coder")  
+  
+# Deleting the property of object  
+# del emp.id  
+# Deleting the object itself 
+emp.display()  
+
+
+#del emp  
+#emp.display()  #it will gives error after del emp

Basics/python_basics/16_class_and_objects/16_class_and_onject_exercise.md

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+## Exercise: Class and Objects
+
+1. Create a sample class named Employee with two attributes id and name 
+
+
+```
+employee :
+    id
+    name
+
+-> such that object initializes id and name dynamically for every employees
+```
+
+2. Use del property on attributes as well as class objects
+
+```
+emp = Employee(1,"coder")
+
+use : del emp.id
+use : del emp
+```
+
+[Solution](https://github.com/codebasics/py/blob/master/Basics/python_basics/16_class_and_objects/16_class_and_objects.py)
+
+
+

Basics/python_basics/17_inheritance/inheritace.py

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+class Father:
+  def __init__(self, name, lastname):
+    self.name = name
+    self.lastname = lastname
+
+  def printname(self):
+    print(self.name, self.lastname)
+
+class Son(Father):
+  def __init__(self, name, lastname):
+    super().__init__(name, lastname)
+
+x = Son("Darshan", "Beladiya")
+x.printname()
+

Basics/python_basics/17_inheritance/inheritance.md

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+## Exercise: Inheritance
+
+1. create inheritance using father son relation on printname.
+
+
+```
+for example, 
+    father and son both has name so create a method for printname by passing firstname and lastname 
+```
+
+2. use super() constructor for calling parent constructor.
+
+```
+class father:
+    #code
+
+class son(father):
+    super()-it refers father class,now you can call father's methods.
+```
+
+[Solution](https://github.com/codebasics/py/blob/master/Basics/python_basics/17_inheritance/17_inheritance.py)
+
+
+

Basics/python_basics/18_multiple_inheritance/multiple_inheritance.md

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+## Exercise: Multiple Inheritance
+
+Real Life Example :
+1. Create multiple inheritance in mario game 
+
+
+```
+Q. if we have created Mario Game with only move module and now we wants to add jump as well as eat then what??? 
+
+Ans :  just make subclass from mario and add extra methods so that we will be having expanded class.
+```
+
+
+
+[Solution](https://github.com/codebasics/py/blob/master/Basics/python_basics/18_multiple_inheritance/18_multiple_inheritance.py)
+
+
+

Basics/python_basics/18_multiple_inheritance/multiple_inheritance.py

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+class superMario():                                                            
+    def move(self):                                             
+        print('I am moving')
+
+
+class jump():                                            
+    def jump_above(self):
+            print('I just jumped')
+
+class mushroom():                                             
+    def eat_mushroom(self):
+            print('I have become big now')
+
+
+class Mario(superMario, mushroom, jump):    
+        pass                                                                 
+play = Mario()                                           
+play.move()                                                        
+play.eat_mushroom() 
+play.jump_above()

Basics/python_basics/19_raise_exception_finally/19_raise_exception_finally.md

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+## Exercise: Raise Exception And Finally
+
+1. Create Any Custom Exception and raise it.
+
+```
+    for creating custom exception just create a subClass of Exception.
+```
+
+2.now raise that custom Exception 
+
+```
+let us say,
+
+if age>18 
+    he is major
+else
+    raise exception
+
+create cusomException named ismajor and raise it if age<18.
+```
+
+
+
+[Solution](https://github.com/codebasics/py/blob/master/Basics/python_basics/19_raise_exception_finally/19_raise_exception_finally.py)
+
+
+

Basics/python_basics/19_raise_exception_finally/19_raise_exception_finally.py

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+# for making exception just make subclass of Exception
+class isMajor(Exception):
+   pass
+ 
+def check(age):
+   if int(age) < 18:
+       raise isMajor
+   else:
+       print('Age: '+str(age))
+ 
+#don't raise
+check(23) 
+#raises an Exception
+check(17)

Basics/python_basics/20_Iterators/20_Iterators.md

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+## Exercise: Iterators
+
+1. create iterator for fibonacci series.
+
+
+```
+Explanation :
+    iterator must be initialized such that each of next returns next fibonacci number
+     
+```
+
+
+
+[Solution](https://github.com/codebasics/py/blob/master/Basics/python_basics/20_Iterators/20_Iterators.py)

Basics/python_basics/20_Iterators/20_Iterators.py

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+class fibonacci:
+    def __init__(self):
+        # default constructor
+        self.previous = 0
+        self.current = 1
+        self.n = 1
+
+    def __iter__(self):  
+        return self
+
+    def __next__(self): 
+        if self.n < 5: 
+            result = self.previous + self.current
+            self.previous = self.current
+            self.current = result
+            self.n += 1
+            return result
+        else:
+            raise StopIteration  
+
+# init the fib_iterator
+fib_iterator = iter(fibonacci())
+while True:
+    # print the value of next fibonaccinacci up to 5th fibonaccinacci
+    try:
+        print(next(fib_iterator))
+    except StopIteration:
+        break  
+
+