python_lab_manual_final (1).pdf

KLE Society’s S Nijalingappa College
Bachelor of Computer Application
III Semester: Python Programming Language
1. Write a program to demonstrate basic data type in python:
a=10
b="Python"
c = 10.5
d=2.14j
e=True
print("Data type of Variable a :",type(a))
print("Data type of Variable b :",type(b))
print("Data type of Variable c :",type(c))
print("Data type of Variable d :",type(d))
print("Data type of Variable e :",type(e))
Output:
Data type of Variable a : <class 'int'>
Data type of Variable b : <class 'str'>
Data type of Variable c : <class 'float'>
Data type of Variable d : <class 'complex'>
Data type of Variable e : <class 'bool'>

2. Create a list and perform the following methods.
a) insert( ) b) remove( ) c) append( ) d) pop( ) e) clear( )
a=[1,3,5,6,7,4,"hello"]
print("The list created is", a)
#insert()
a.insert(3,20)
print("Insert the element 20 at index position 3. The modified list isn", a)
#remove()
a.remove(7)
print("Remove the element 7 from the list. The modified list is n", a)
#append()
a.append("hi")
print("Appended the list with a stringn", a)
c=len(a)
print("The length of the list is n", c)
#pop()
a.pop()
print("After popping the element from the list n", a)
a.pop(6)
print("After popping the element at index position 6 from the list, modified list is
n", a)
# clear()
a.clear()
print("The cleared list is n", a)
Output:
The list created is [1, 3, 5, 6, 7, 4, 'hello']
Insert the element 20 at index position 3. The modified list is
[1, 3, 5, 20, 6, 7, 4, 'hello']
Remove the element 7 from the list. The modified list is
[1, 3, 5, 20, 6, 4, 'hello']
Appended the list with a string

[1, 3, 5, 20, 6, 4, 'hello', 'hi']
The length of the list is : 8
After popping the element from the list
[1, 3, 5, 20, 6, 4, 'hello']
After popping the element at index position 6 from the list, modified list is
[1, 3, 5, 20, 6, 4]
The cleared list is
[]
3. Create a tuple and perform the following methods.
a) Add items b) len( ) c) Check for item in tuple d) Access items
rainbow=("v","i","b","g","y","o","r")
print("The tuple of alphabets creating a rainbow is n", rainbow)
colour=("violet","Indigo","blue","green","yellow","orange","red")
print("The tuple of colours in a rainbow is n", colour)
# Add items in tuples
rainbow_colour=rainbow+colour
print("Concatenating the two tuples we get n", rainbow_colour)
#length of the tuple
c=len(rainbow_colour)
print("The length of the concatenated tuple is", c)
# check for item in tuple
print("Item prsent in the list it returns True Or Else False")
if "blue" in rainbow_colour:
print(True)
else:
print(False)
#Access items in tuple
print("Printing the item rainbow[2]: of tuple",rainbow[2])
"""rainbow[1:3] means all the items in rainbow tuple
starting from an index value of 1 up to an index value of 3 excluding 3"""
print("Printing the items rainbow[1:3]",rainbow[1:3])
print("Printing the items rainbow[0:4]",rainbow[0:4])

Output:
The tuple of alphabets creating a rainbow is
('v', 'i', 'b', 'g', 'y', 'o', 'r')
The tuple of colours in a rainbow is
('violet', 'Indigo', 'blue', 'green', 'yellow', 'orange', 'red')
Concatenating the two tuples we get
('v', 'i', 'b', 'g', 'y', 'o', 'r', 'violet', 'Indigo', 'blue', 'green', 'yellow', 'orange', 'red')
The length of the concatenated tuple is 14
If Item present in the list it returns True Or Else False
True
Printing the item rainbow[2]: of tuple b
Printing the items rainbow[1:3] ('i', 'b')
Printing the items rainbow[0:4] ('v', 'i', 'b', 'g')

4. Create a dictionary and apply the following methods.
1. Print the dictionary items 2. Access items 3. Use get( ) 4. Change Values
5. Use len( )
#Source code:
# creating a dictionary
college={'name': "QIS", 'code': "QISIT",'pincode': 560050 }
print(college)
#adding items to dictionary
college["location"] = "IBP"
print(college)
#changing values of a key
college["location"] = "vijayawada"
print(college)
#know the length using len()
print("length of college is:",len(college))
#Acess items
print("college['name']:",college['name'])
# use get ()
x=college.get('pincode')
print(x)
#to copy the same dictionary use copy()
mycollege= college.copy()
print(mycollege)
Output:
{'name': 'QIS', 'code': 'QISIT', 'pincode': 560050}
{'name': 'QIS', 'code': 'QISIT', 'pincode': 560050, 'location': 'IBP'}
{'name': 'QIS', 'code': 'QISIT', 'pincode': 560050, 'location': 'vijayawada'}
length of college is: 4
college['name']: QIS
560050
{'name': 'QIS', 'code': 'QISIT', 'pincode': 560050, 'location': 'vijayawada'}

5. Write a programto create a menu with the following options
1. TO PERFORM ADDITITON 2.TO PERFORM SUBTRACTION3. TO
PERFORM MULTIPICATION
4. TO PERFORM DIVISION
Accepts users input and perform the operation accordingly. Use functions
with arguments.
def add(n1,n2):
return n1+n2
def sub(n1,n2):
return n1-n2
def mul(n1,n2):
return n1*n2
def div(n1,n2):
return n1/n2
print("Welcome to the Arithmetic Program")
print("1. TO PERFORM ADDITION")
print("2. TO PERFORM SUBTRACTION")
print("3. TO PERFORM MULTIPLICATION")
print("4. TO PERFORM DIVISION")
print("0. To Exit")
x = int(input(" Enter the first numbern"))
y = int(input(" Enter the second numbern"))
choice =1
while(choice!=0):
choice = int(input("Enter your choice"))
if choice == 1:
print(x, "+" ,y ,"=" ,add(x,y))
elif choice == 2:
print(x, "-" ,y ,"=" ,sub(x,y))
elif choice == 3:
print(x, "*" ,y ,"=" ,mul(x,y))
elif choice == 4:
print(x, "%" ,y ,"=" ,div(x,y))
elif choice ==0:

print("Exit")
else:
print("Invalid Choice");
Output:
Welcome to the Arithmetic Program
1. TO PERFORM ADDITION
2. TO PERFORM SUBTRACTION
3. TO PERFORM MULTIPLICATION
4. TO PERFORM DIVISION
0. To Exit
Enter the first number
12
Enter the second number
4
Enter your choice : 1
12 + 4 = 16
12 - 4 = 8
12 * 4 = 48
12 % 4 = 3.0
Invalid Choice
Exit

6.Write a Program to print a number is Positive / Negative using if-else
print("Program to print a number is Positive / Negative")
choice =1
while(choice!=0):
number=int(input("Enter a Number :"))
if number >0:
print("The Number",number,"is Positive")
elif number <0:
print("The Number",number, "is negative")
else:
print("ZERO is a Neutral number ")
choice=int(input("Do you wish to continue 1/0 :"))
Output:
Program to print a number is Positive / Negative
Enter a Number : 5
The Number 5 is Positive
Do you wish to continue 1/0 : 1
Enter a Number : -8
The Number -8 is negative
Enter a Number : 0
ZERO is a Neutral number

7. Write a program to filter only even numbers from a given list.(without
using filter function).
def find_even_numbers(list_items):
print(" The EVEN numbers in the list are: ")
for item in list_items:
if item%2==0:
print(item)
def main():
list1=[2,3,6,8,48,97,56]
find_even_numbers(list1)
if __name__=="__main__":
main()
Output:
The EVEN numbers in the list are:
2
6
8
48
56
7. Write a program for filter() to filter only even numbers from a given list.
def even(x):
return x % 2 == 0
a=[2,5,7,16,8,9,14,78]
result=filter(even,a)
print(" original List is :",a)
print(" Filtered list is : ",list(result))
Output:
original List is : [2, 5, 7, 16, 8, 9, 14, 78]
Filtered list is : [2, 16, 8, 14, 78]

8.Write a python program to print date, time for today and now.
import datetime
a=datetime.datetime.today()
b=datetime.datetime.now()
print("now date and time is:",b)
print("Today date is :",a)
print("current year :",a.year)
print("current month :",a.month)
print("current day :",a.day)
print(a.strftime("%a"))
print(a.strftime("%b"))
print(a.strftime("%c"))
Output:
now date and time is: 2023-02-28 19:39:01.936566
Today date is : 2023-02-28 19:39:01.936567
current year : 2023
current month : 2
current day : 28
Tue
Feb
Tue Feb 28 19:39:01 2023

python_lab_manual_final (1).pdf

9. Write a python program to add some days to your present date and print
the date added.
from datetime import datetime
from datetime import timedelta
from datetime import date
# taking input as the current date
# today() method is supported by date
# class in datetime module
Begindatestring = date.today()
# print begin date
print("Beginning date")
print(Begindatestring)
# calculating end date by adding 4 days
Enddate = Begindatestring + timedelta(days=10)
# printing end date
print("Ending date")
print(Enddate)
Output:
Beginning date
2023-02-28
Ending date
2023-03-10

10. Write a program to count the number of characters ina string and store
them in a dictionary data structure.
def construct_character_dict(word):
character_count_dict=dict()
for each_character in word:
character_count_dict[each_character]=character_count_dict.get(each_character,0)+1
print(character_count_dict)
def main():
word=input("enter a string :")
construct_character_dict(word)
if __name__=="__main__":
main()
Output:
enter a string :klebca
{'k': 1, 'l': 1, 'e': 1, 'b': 1, 'c': 1, 'a': 1}
11. Write a python program count frequency of characters in a given file
Source Code:
import collections
import pprint
file_input = input('File Name: ')
with open(file_input, 'r') as info:
count = collections.Counter(info.read().upper())
value = pprint.pformat(count)
print(value)

Output:
File Name: gfg.txt
Counter({'L': 4,
'E': 3,
' ': 3,
'A': 3,
'.': 2,
'N': 2,
'I': 2,
'G': 2,
'P': 2,
'K': 1,
"'": 1,
'S': 1,
'J': 1,
'C': 1,
'O': 1})
12. Using a numpy module create an array and check the following:
1. Type of array 2. Axes of array3. Shape of array 4. Type of elements in
array
import numpy as np
arr=np.array([[1,2,3],[4,2,5]])
print("Array is of type:",type(arr))
print("no.of dimensions:",arr.ndim)
print("Shape of array:",arr.shape)
print("Size of array:",arr.size)
print("Array stores elements of type:",arr.dtype)

Output:
Array is of type: <class 'numpy.ndarray'>
no.of dimensions: 2
Shape of array: (2, 3)
Size of array: 6
Array stores elements of type: int32

13.Write a python program to concatenate the dataframes with two different
objects.
import pandas as pd
one=pd.DataFrame({'Name':['teju','gouri'], 'age':[19,20]},
index=[1,2])
two=pd.DataFrame({'Name':['suma','nammu'], 'age':[20,21]},
index=[3,4])
print(pd.concat([one,two]))
Output:
Name age
1 teju 19
2 gouri 20
3 suma 20
4 nammu 21

14. Write a python code to read a csv file using pandas module and print frist
five and last five lines of a file.
Source Code:
import pandas as pd
pd.set_option('display.max_rows', 50)
pd.set_option('display.max_columns', 50)
diamonds = pd.read_csv('List.csv')
print("First 5 rows:")
print(diamonds.head())
print("Last 5 rows:")
print(diamonds.tail())
Output:
First 5 rows:
REG NO NAME COURSE FEES LANGUAGE
0 101 jagan BCA 100000 KAN
1 102 jithin Bcom 100000 HIN
2 103 preethi BCA 100000 KAN
3 104 manoj BBA 30000 HIN
4 105 nikitha MBA 200000 TEL
Last 5 rows:
REG NO NAME COURSE FEES LANGUAGE
6 107 pavan ts Mtech 600000 TAMIL
7 108 ramu BSC 45000 KAN
8 109 radha BCA 100000 KAN
9 110 sita BCA 100000 KAN
10 111 raj BCom 100000 TEL

15. WAP which accepts the radius of a circle from user and compute the
area(Use math module)
import math as M
radius = float(input("Enter the radius of the circle : "))
area_of_circle = M.pi*radius*radius
circumference_of_circle = 2*M.pi*radius
print("the area of circle is", area_of_circle)
print("the circumference of circle is", circumference_of_circle)
Output:
Enter the radius of the circle: 45
The area of circle is 6361.725123519332
The circumference of circle is 282.7433388230814

python_lab_manual_final (1).pdf

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