Syllabus:-
Lab Manual:-
Practical 1:- Introduction to various IDE for programming in python.
Practical 2:- Data Types, Operators and conditional statements
(a) Write a program to print “Hello World”.
# This program prints Hello, world!
print('Hello, world!')
Output
Hello, world!(b) Write a program to find the maximum number out of 3 numbers.
# Python program to find the largest
# number among the three numbers
def maximum(a, b, c):
if (a >= b) and (a >= c):
largest = a
elif (b >= a) and (b >= c):
largest = b
else:
largest = c
return largest
# Driven code
a = 10
b = 14
c = 12
print(maximum(a, b, c))
Output:-
14
(c) Write a program to swap the values of two variables without using temporary variable
X=15
Y=10
print("Before Swapping",X,Y)
X,Y=Y,X
print("After Swapping",X,Y)
Output:-
Before Swapping 15 10
After Swapping 10 15
(d) Write a program to implement calculator.
# Program make a simple calculator
# This function adds two numbers
def add(x, y):
return x + y
# This function subtracts two numbers
def subtract(x, y):
return x - y
# This function multiplies two numbers
def multiply(x, y):
return x * y
# This function divides two numbers
def divide(x, y):
return x / y
print("Select operation.")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")
while True:
# take input from the user
choice = input("Enter choice(1/2/3/4): ")
# check if choice is one of the four options
if choice in ('1', '2', '3', '4'):
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))
if choice == '1':
print(num1, "+", num2, "=", add(num1, num2))
elif choice == '2':
print(num1, "-", num2, "=", subtract(num1, num2))
elif choice == '3':
print(num1, "*", num2, "=", multiply(num1, num2))
elif choice == '4':
print(num1, "/", num2, "=", divide(num1, num2))
# check if user wants another calculation
# break the while loop if answer is no
next_calculation = input("Let's do next calculation? (yes/no): ")
if next_calculation == "no":
break
else:
print("Invalid Input")
Output
Select operation.
1.Add
2.Subtract
3.Multiply
4.Divide
Enter choice(1/2/3/4): 3
Enter first number: 15
Enter second number: 14
15.0 * 14.0 = 210.0
Let's do next calculation? (yes/no): no(e) Write a Python program to calculate the sum of the digits in an integer.
# Python program to
# compute sum of digits in
# number.
# Function to get sum of digits
def getSum(n):
sum = 0
for digit in str(n):
sum += int(digit)
return sum
n = 12345
print(getSum(n))
Output:-
15
Practical 3:- Control Structures and Functions:
a) Write a program for find factorial of a given number using iterative and recursive function.
# Factorial of a number using recursion
def recur_factorial(n):
if n == 1:
return n
else:
return n*recur_factorial(n-1)
num = 7
# check if the number is negative
if num < 0:
print("Sorry, factorial does not exist for negative numbers")
elif num == 0:
print("The factorial of 0 is 1")
else:
print("The factorial of", num, "is", recur_factorial(num))
Output
The factorial of 7 is 5040b) Write a program which takes a sentence from user and calculates number of digits, letters, uppercase letters, lowercase letter and spaces in sentence.
string=input("Enter string:")
count1=0
count2=0
count3=0
for i in string:
if(i.islower()):
count1=count1+1
elif(i.isupper()):
count2=count2+1
elif(i.isdigit()):
count3=count3+1
print("The number of lowercase characters is:")
print(count1)
print("The number of uppercase characters is:")
print(count2)
print("The number of digits characters is:")
print(count3)
Output:
Enter string:selfish789
The number of lowercase characters is:
7
The number of uppercase characters is:
0
The number of digits characters is:
3
c) Write a program to find GCD of two numbers
# Python code to demonstrate the working of gcd()
# importing "math" for mathematical operations
import math
print("The gcd of 60 and 48 is : ", end="")
print(math.gcd(60, 48))
Output:-
12
d) Write a program to convert Decimal to hex, octal and binary.
# Python program to convert decimal into other number systems
dec = 344
print("The decimal value of", dec, "is:")
print(bin(dec), "in binary.")
print(oct(dec), "in octal.")
print(hex(dec), "in hexadecimal.")
Output
The decimal value of 344 is:
0b101011000 in binary.
0o530 in octal.
0x158 in hexadecimal.Practical 4:- Working with Data structure - Part I
a)Write a program to remove duplicates from list.
student = ["sanskar","priyan","om","soumil","sanskar","soumil"]
print(student)
student1=[]
for i in student:
if i not in student1:
student1.append(i)
print(student1)
Output:-
['sanskar', 'priyan', 'om', 'soumil', 'sanskar', 'soumil']
['sanskar', 'priyan', 'om', 'soumil']
b) Write a program to find frequency of elements of list.
student = ["sanskar","priyan","om","soumil","sanskar","soumil"]
frequency = {}
for i in student:
if i in frequency:
frequency[i] += 1
else:
frequency[i] = 1
print(frequency)
bb
b
Output:-
{'sanskar': 2, 'priyan': 1, 'om': 1, 'soumil': 2}
c) Write a program to sort given list
student = [12,10,5,8,7,6]
student.sort()
print(student)
Output:-
[5, 6, 7, 8, 10, 12]
d) Write a program for matrix addition and matrix multiplication using list.
a=[[1,2,3],[4,5,6]]
b=[[4,5,6],[1,2,3]]
c=[[0,0,0],[0,0,0]]
for i in range(len(a)):
for j in range(len(a[0])):
c[i][j]=a[i][j]+b[i][j]
print("sum of matrix")
for g in c:
print(g)
for i in range(len(a)):
for j in range(len(b[0])):
for k in range(len(b)):
c[i][j] += a[i][k] * b[k][j]
print("Multiplication of matrix")
for r in c:
print(r)
Output:-
sum of matrix
[5, 7, 9]
[5, 7, 9]
Multiplication of matrix
[11, 16, 21]
[26, 37, 48]
G) Write a program to remove an element from tuple
student = ("sanskar","priyan","om","soumil","sanskar","soumil")
print(student)
rem1 = list(student)
rem1.remove("priyan")
student = tuple(rem1)
print(student)
Output:
('sanskar', 'priyan', 'om', 'soumil', 'sanskar', 'soumil')
('sanskar', 'om', 'soumil', 'sanskar', 'soumil')
f) Write a program to find minimum and maximum value in list of tuples.
numbers = [(2, 3), (4, 7), (8, 11), (3, 6),(1,5)]
print (str(numbers))
res1 = min(numbers)[0]
res2= max(numbers)[0]
res3 = min(numbers)[1]
res4=max(numbers)[1]
print ("min value of list index 0 " + str(res1)+"min value of list index 1 " +str(res3))
print ("max value of list index 1"+str(res2) + "max value of list index 0 " +str(res4))
Output:-
[(2, 3), (4, 7), (8, 11), (3, 6), (1, 5)]
min value of list index 0 1min value of list index 1 5
max value of list index 18max value of list index 0 11
e) Write a program to generate Pascal’s triangle using list.
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Practical 5:- Working with Data structure - Part II:
a) Write a program to map 2 lists into a dictionary.
keys = ['red', 'green', 'blue']
values = ['#FF0000','#008000', '#0000FF']
color_dictionary = dict(zip(keys, values))
print(color_dictionary)
Output:-
{'red': '#FF0000', 'green': '#008000', 'blue': '#0000FF'}
b) Write a program to invert keys and values of dictionary.
myDict = {1: 1, 2: 4, 3: 9, 4: 16, 5: 1}
print("The input dictionary is:")
print(myDict)
reversedDict = ()
for key in myDict:
val = myDict[key]
reversedDict[val] = key
print("The reversed dictionary is:")
print(reversedDict)
Output:-
The input dictionary is:
{1: 1, 2: 4, 3: 9, 4: 16, 5: 1}
The reversed dictionary is:
{1: 5, 4: 2, 9: 3, 16: 4}
c) Write a program to generate dictionary of frequency of alphabets of given string.
str1 = input ("Enter the string: ")
d = dict()
for c in str1:
if c in d:
d[c] = d[c] + 1
else:
d[c] = 1
print(d)
Output:-
Enter the string: devam
{'d': 1, 'e': 1, 'v': 1, 'a': 1, 'm': 1}
d) Write a Python program to sum all the items in a dictionary.
def returnSum(myDict):
list = []
for i in myDict:
list.append(myDict[i])
final = sum(list)
return final
dict = {'a': 100, 'b': 200, 'c': 300}
print("Sum :", returnSum(dict))
Output:-
Sum : 600
e) Write a script to concatenate given dictionaries
d1={'A':1,'B':2}
d2={'C':3}
d1.update(d2)
print("Concatenated dictionary is:")
print(d1)
Output:-
Concatenated dictionary is:
{'A': 1, 'B': 2, 'C': 3}
f) Create a dictionary where keys are name of students and values are another dictionary containing semester, age and cpi of that student. Print all the names of students. Print only names of students Print the name of student having highest CPI
n = int(input("Enter number of students: "))
result = {}
for i in range(n):
print("Enter Details of student No.", i+1)
name = input("Name: ")
sem = int(input("Semester:"))
age = int(input("Age:"))
cpi = float(input("CPI: "))
result[name] = {'sem':sem,'age':age,'cpi':cpi}
print(result)
print(result.keys())
for key, value in result.items():
print(key)
maxCpi=0
maxCpiname=''
for key in result:
value=result[key]
tempCpi=int(value["cpi"])
if(tempCpi>maxCpi):
maxCpi=tempCpi
maxCpiname=key
print("Student having highest CPI:",maxCpiname)
Output:-
Enter number of students: 2
Enter Details of student No. 1
Name: raj
Semester:3
Age:18
CPI: 9.6
Enter Details of student No. 2
Name: helly
Semester:5
Age:19
CPI: 7
{'raj': {'sem': 3, 'age': 18, 'cpi': 9.6}, 'helly': {'sem': 5, 'age': 19, 'cpi': 7.0}}
dict_keys(['raj', 'helly'])
raj
helly
Student having highest CPI: raj
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