Python Challenging Programming Exercises Part 2

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

Question 1: Define a class with a generator which can iterate the numbers, which are divisible by 7, between a given range 0 and n.

Hints: Consider use yield

Solution:

def putNumbers(n):
    i = 0
    while i

Question 2: Write a program to compute the frequency of the words from the input. The output should output after sorting the key alphanumerically. 
Suppose the following input is supplied to the program:
New to Python or choosing between Python 2 and Python 3? Read Python 2 or Python 3.
Then, the output should be:
2:2
3.:1
3?:1
New:1
Python:5
Read:1
and:1
between:1
choosing:1
or:2
to:1
 

Hints In case of input data being supplied to the question, it should be assumed to be a console input. 
 

Solution:

freq = {}   # frequency of words in text
line = input()
for word in line.split():
    freq[word] = freq.get(word,0)+1

words = freq.keys()

for w in words:
    print("%s:%d" % (w,freq[w]))

Question 3: Write a method which can calculate square value of number

Hints: Using the ** operator 

Solution:

def square(num):
    return num ** 2

print(square(2))
print(square(3))

Question 4: Python has many built-in functions, and if you do not know how to use it, you can read document online or find some books. But Python has a built-in document function for every built-in functions.
Please write a program to print some Python built-in functions documents, such as abs(), int(), input() And add document for your own function

Hints: The built-in document method is __doc__

Solution:

print(abs.__doc__)
print(int.__doc__)
print(input.__doc__)

def square(num):
    '''Return the square value of the input number.
    
    The input number must be integer.
    '''
    return num ** 2

print(square(2))
print(square.__doc__)

Question 5: Define a class, which have a class parameter and have a same instance parameter.

Hints: Define a instance parameter, need add it in __init__ method You can init a object with construct parameter or set the value later 

Solution:

class Person:
    # Define the class parameter "name"
    name = "Person"
    
    def __init__(self, name = None):
        # self.name is the instance parameter
        self.name = name

vivek = Person("Vivek")
print("%s name is %s" % (Person.name, vivek.name))

aayush = Person()
aayush.name = "Aayush"
print("%s name is %s" % (Person.name, aayush.name))

Question 6: Define a function which can compute the sum of two numbers.

Hints: Define a function with two numbers as arguments. You can compute the sum in the function and return the value. 

Solution:

def SumFunction(number1, number2):
    return number1+number2

print(SumFunction(1,2))

Question 7: Define a function that can convert a integer into a string and print it in console.

Hints: Use str() to convert a number to string. 

Solution:

def printValue(n):
    print(str(n))

printValue(3)

Question 8: Define a function that can receive two integral numbers in string form and compute their sum and then print it in console.

Hints: Use int() to convert a string to integer.  

Solution:

def printValue(s1,s2):
    print(int(s1)+int(s2))

printValue("3","4")

Question 9: Define a function that can accept two strings as input and concatenate them and then print it in console.

Hints: Use + to concatenate the strings  

Solution:

def printValue(s1,s2):
    print(s1+s2)

printValue("3","4")

Question 10: Define a function that can accept two strings as input and print the string with maximum length in console. If two strings have the same length, then the function should print al l strings line by line.

Hints: Use len() function to get the length of a string 

Solution:

def printValue(s1,s2):
    len1 = len(s1)
    len2 = len(s2)
    if len1>len2:
        print(s1)
    elif len2>len1:
        print(s2)
    else:
        print(s1)
        print(s2)


printValue("one","three")

Question 11: Define a function that can accept an integer number as input and print the "It is an even number" if the number is even, otherwise print "It is an odd number".

Hints: Use % operator to check if a number is even or odd. 

Solution:

def checkValue(n):
    if n%2 == 0:
        print("It is an even number")
    else:
        print("It is an odd number")


checkValue(int(input()))

Question 12: Define a function which can print a dictionary where the keys are numbers between 1 and 3 (both included) and the values are square of keys.

Hints: Use dict[key]=value pattern to put entry into a dictionary. 
Use ** operator to get power of a number.  

Solution:

def printDict():
    d=dict()
    d[1]=1
    d[2]=2**2
    d[3]=3**2
    print(d)


printDict()

Question 13: Define a function which can print a dictionary where the keys are numbers between 1 and 20 (both included) and the values are square of keys.

Hints: Use dict[key]=value pattern to put entry into a dictionary.
Use ** operator to get power of a number.
Use range() for loops.

Solution:

def printDict():
    d=dict()
    for i in range(1,21):
        d[i]=i**2
    print(d)


printDict()

Question 14: Define a function which can generate a dictionary where the keys are numbers between 1 and 20 (both included) and the values are square of keys. The function should just print the values only.

Hints: Use dict[key]=value pattern to put entry into a dictionary.
Use ** operator to get power of a number.
Use range() for loops.
Use keys() to iterate keys in the dictionary. Also we can use item() to get key/value pairs.  

Solution:

def printDict():
    d=dict()
    for i in range(1,21):
        d[i]=i**2
    for (k,v) in d.items():
        print(v)

printDict()

Question 15: Define a function which can generate a dictionary where the keys are numbers between 1 and 20 (both included) and the values are square of keys. The function should just print the keys only.

Hints: Use dict[key]=value pattern to put entry into a dictionary.
Use ** operator to get power of a number.
Use range() for loops.
Use keys() to iterate keys in the dictionary. Also we can use item() to get key/value pairs. 
 

Solution:

def printDict():
    d=dict()
    for i in range(1,21):
        d[i]=i**2
    for k in d.keys():
        print(k)
printDict()        

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