Python Challenging Programming Exercises Part 3

There is Three Level in This Challenging Program. Beginners, Intermediate and Advanced, Before Reading this post, I recommend you View Python Challenging Programming Exercises Part 1 for better Understanding.

Question 1: Define a function which can generate and print a list where the values are square of numbers between 1 and 20 (both included).

Hints:

Use ** operator to get power of a number.
Use range() for loops.
Use list.append() to add values into a list.

Solution:

def printList():
    li=list()
    for i in range(1,21):
        li.append(i**2)
    print(li)
printList()

Question 2: Define a function which can generate a list where the values are square of numbers between 1 and 20 (both included). Then the function needs to print the first 5 elements in the list.

Hints:

Use ** operator to get power of a number.
Use range() for loops.
Use list.append() to add values into a list.
Use [n1:n2] to slice a list

Solution:

def printList():
    li=list()
    for i in range(1,21):
        li.append(i**2)
    print(li[:5])

printList()

Question 3: Define a function which can generate a list where the values are square of numbers between 1 and 20 (both included). Then the function needs to print the last 5 elements in the list.

Hints:

Use ** operator to get power of a number.
Use range() for loops.
Use list.append() to add values into a list.
Use [n1:n2] to slice a list

Solution:

def printList():
    li=list()
    for i in range(1,21):
        li.append(i**2)
    print(li[-5:])

printList()

Question 4: Define a function which can generate a list where the values are square of numbers between 1 and 20 (both included). Then the function needs to print all values except the first 5 elements in the list.

Hints:

Use ** operator to get power of a number.
Use range() for loops.
Use list.append() to add values into a list.
Use [n1:n2] to slice a list
 

Solution:

def printList():
    li=list()
    for i in range(1,21):
        li.append(i**2)
    print(li[5:])

printList()

Question 5: Define a function which can generate and print a tuple where the value are square of numbers between 1 and 20 (both included). 

Hints:

Use ** operator to get power of a number.
Use range() for loops.
Use list.append() to add values into a list.
Use tuple() to get a tuple from a list.
 

Solution:

def printTuple():
    li=list()
    for i in range(1,21):
        li.append(i**2)
    print(tuple(li))

printTuple()

Question 6: With a given tuple (1,2,3,4,5,6,7,8,9,10), write a program to print the first half values in one line and the last half values in one line. 

Hints:

Use [n1:n2] notation to get a slice from a tuple.
 

Solution:

tp=(1,2,3,4,5,6,7,8,9,10)
tp1=tp[:5]
tp2=tp[5:]
print(tp1)
print(tp2)

Question 7: Write a program to generate and print another tuple whose values are even numbers in the given tuple (1,2,3,4,5,6,7,8,9,10). 

Hints:

Use "for" to iterate the tuple
Use tuple() to generate a tuple from a list.
 

Solution:

def printList():
    li=list()
    for i in range(1,21):
        li.append(i**2)
    print(li[:5])

printList()

Question 8: Write a program which accepts a string as input to print "Yes" if the string is "yes" or "YES" or "Yes", otherwise print "No". 

Hints:

Use if statement to judge condition.
 

Solution:

s= input()
if s=="yes" or s=="YES" or s=="Yes":
    print("Yes")
else:
    print("No")

Question 9: Write a program which can filter even numbers in a list by using filter function. The list is: [1,2,3,4,5,6,7,8,9,10].

Hints:

Use filter() to filter some elements in a list.
Use lambda to define anonymous functions.
 

Solution:

li = [1,2,3,4,5,6,7,8,9,10]
evenNumbers = list(filter(lambda x: x%2==0, li))
print(evenNumbers)

Question 10: Write a program which can map() to make a list whose elements are square of elements in [1,2,3,4,5,6,7,8,9,10].

Hints:

Use map() to generate a list.
Use lambda to define anonymous functions.
 

Solution:

li = [1,2,3,4,5,6,7,8,9,10]
squaredNumbers = list(map(lambda x: x**2, li))
print(squaredNumbers)

Question 11: Write a program which can map() and filter() to make a list whose elements are square of even number in [1,2,3,4,5,6,7,8,9,10].

Hints:

Use map() to generate a list.
Use filter() to filter elements of a list.
Use lambda to define anonymous functions.
 

Solution:

li = [1,2,3,4,5,6,7,8,9,10]
evenNumbers = list(map(lambda x: x**2, filter(lambda x: x%2==0, li)))
print(evenNumbers)

Question 12: Write a program which can filter() to make a list whose elements are even number between 1 and 20 (both included).

Hints:

Use filter() to filter elements of a list.
Use lambda to define anonymous functions.
 

Solution:

evenNumbers = list(filter(lambda x: x%2==0, range(1,21)))
print(evenNumbers)

Question 13: Write a program which can map() to make a list whose elements are square of numbers between 1 and 20 (both included).

Hints:

Use map() to generate a list.
Use lambda to define anonymous functions.
 

Solution:

squaredNumbers = list(map(lambda x: x**2, range(1,21)))
print(squaredNumbers)

Question 14: Define a class named American which has a static method called printNationality.

Hints:

Use @staticmethod decorator to define class static method.
 

Solution:

class American(object):
    @staticmethod
    def printNationality():
        print("America")

anAmerican = American()
anAmerican.printNationality()
American.printNationality()

Question 15: Define a class named American and its subclass NewYorker. 

Hints:

Use class Subclass(ParentClass) to define a subclass.
 

Solution:

class American(object):
    pass

class NewYorker(American):
    pass

anAmerican = American()
aNewYorker = NewYorker()
print(anAmerican)
print(aNewYorker)

Question 16: Define a class named Circle which can be constructed by a radius. The Circle class has a method which can compute the area. 

Hints:

Use def methodName(self) to define a method.
 

Solution:

class Circle(object):
    def __init__(self, r):
        self.radius = r

    def area(self):
        return self.radius**2*3.14

aCircle = Circle(2)
print(aCircle.area())

Question 17: Define a class named Rectangle which can be constructed by a length and width. The Rectangle class has a method which can compute the area. 

Hints:

Use def methodName(self) to define a method.
 

Solution:

class Rectangle(object):
    def __init__(self, l, w):
        self.length = l
        self.width  = w

    def area(self):
        return self.length*self.width

aRectangle = Rectangle(2,10)
print(aRectangle.area())

Question 18: Define a class named Shape and its subclass Square. The Square class has an init function which takes a length as argument. Both classes have a area function which can print the area of the shape where Shape's area is 0 by default.

Hints:

To override a method in super class, we can define a method with the same name in the super class.
 

Solution:

class Shape(object):
    def __init__(self):
        pass

    def area(self):
        return 0

class Square(Shape):
    def __init__(self, l):
        Shape.__init__(self)
        self.length = l

    def area(self):
        return self.length*self.length

aSquare= Square(3)
print(aSquare.area())

Question 19: Please raise a RuntimeError exception.

Hints:

Use raise() to raise an exception.
 

Solution:

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