List of Programs for Computer Sc. Practical file - XII
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Write a Program to show whether entered numbers are prime or not in the given range.
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Input a string and determine whether it is a palindrome or not.
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Write a recursive code to find the sum of all elements of a list.
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Read a text file line by line and display each word separated by a #.
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Write a program that accepts a filename of a text file and reports the file's longest line.
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Create a binary file with roll number, name and marks. Input a roll number and update details.
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Remove all the lines that contain the character `a' in a file and write it to another file.
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Program to search the record of a particular student from CSV file on the basis of inputted name.
-
Write a random number generator that generates random numbers between 1 and 6 (simulates a dice).
-
Write a program to create a library in python and import it in a program.
-
Write a python program to implement a stack using a list data-structure.
-
Write a program to implement a queue using a list data structure.
1. Write a Program to show whether entered numbers are prime or not in the given range.
lower=int(input("Enter lowest number as lower bound to check : "))
upper=int(input("Enter highest number as upper bound to check: "))
c=0
for i in range(lower, upper+1):
if (i == 1):
continue
# flag variable to tell if i is prime or not
flag = 1
for j in range(2, i // 2 + 1):
if (i % j == 0):
flag = 0
break
# flag = 1 means i is prime
# and flag = 0 means i is not prime
if (flag == 1):
print(i, end = " ")
2. Input a string and determine whether it is a palindrome or not.
string=input('Enter a string:')
length=len(string)
mid=length//2
rev=-1
for a in range(mid):
if string[a]==string[rev]:
print(string,'is a palindrome.')
break
else:
print(string,'is not a palindrome.')
3. Find the largest/smallest number in a list/tuple
# creating empty list
list1 = []
# asking number of elements to put in list
num = int(input("Enter number of elements in list: "))
# iterating till num to append elements in list
for i in range(1, num + 1):
ele= int(input("Enter elements: "))
list1.append(ele)
# print maximum element
print("Largest element is:", max(list1))
# print minimum element
print("Smallest element is:", min(list1))
4. WAP to input any two tuples and swap their values.
t1 = tuple()
n = int (input("Total no of values in First tuple: "))
for i in range(n):
a = input("Enter Elements : ")
t1 = t1 + (a,)
t2 = tuple()
m = int (input("Total no of values in Second tuple: "))
for i in range(m):
a = input("Enter Elements : ")
t2 = t2 + (a,)
print("First Tuple : ")
print(t1)
print("Second Tuple : ")
print(t2)
t1,t2 = t2, t1
print("After Swapping: ")
print("First Tuple : ")
print(t1)
print("Second Tuple : ")
print(t2)
5. WAP to store students’ details like admission number, roll number, name and percentage in a dictionary and display information on the basis of admission number.
record = dict ()
i=1
n= int (input ("How many records u want to enter: "))
while(i<=n):
Adm = input("Enter Admission number: ")
roll = input("Enter Roll Number: ")
name = input("Enter Name :")
perc = float(input("Enter Percentage : "))
t = (roll,name, perc)
record[Adm] = t
i = i + 1
Nkey = record.keys()
for i in Nkey:
print("\nAdmno- ", i, " :")
r = record[i]
print("Roll No\t", "Name\t", "Percentage\t")
for j in r:
print(j, end = "\t")
6. Write a program with a user-defined function with string as a parameter which replaces all vowels in the string with ‘*’.
def strep(str):
# convert string into list
str_lst =list(str)
# Iterate list
for i in range(len(str_lst)):
# Each Character Check with Vowels
if str_lst[i] in 'aeiouAEIOU':
# Replace ith position vowel with'*'
str_lst[i]='*'
#to join the characters into a new string.
new_str = "".join(str_lst)
return new_str
def main():
line = input("Enter string: ")
print("Orginal String")
print(line)
print("After replacing Vowels with '*'")
print(strep(line))
main()
7. Recursively find the factorial of a natural number.
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
def main():
n = int(input("Enter any number: "))
print("The factorial of given number is: ",factorial(n))
main()
8. Write a recursive code to find the sum of all elements of a list.
def lstSum(lst,n):
if n==0:
return 0
else:
return lst[n-1]+lstSum(lst,n-1)
mylst = [] # Empty List
#Loop to input in list
num = int(input("Enter how many number :"))
for i in range(num):
n = int(input("Enter Element "+str(i+1)+":"))
mylst.append(n) #Adding number to list
sum = lstSum(myl
st,len(mylst))
print("Sum of List items ",mylst, " is :",sum)
9. Write a recursive code to compute the nth Fibonacci number.
def fibonacci(n):
if n == 0:
return 0
elif n == 1:
return 1
else:
return(fibonacci(n-2) + fibonacci(n-1))
nterms = int(input("Please enter the Range Number: "))
# check if the number of terms is valid
if nterms <= 0:
print("Plese enter a positive integer")
else:
print("Fibonacci sequence:")
for i in range(nterms):
print(fibonacci(i),end=' ')
10.Read a text file line by line and display each word separated by a #.
filein = open("Mydoc.txt",'r')
line =" "
while line:
line = filein.readline()
#print(line)
for w in line:
if w == ' ':
print('#',end = '')
else:
print(w,end = '')
filein.close()
'''
#-------------OR------------------
filein = open("Mydoc.txt",'r')
for line in filein:
word= line .split()
for w in word:
print(w + '#',end ='')
print()
filein.close()
'''
11. Read a text file and display the number of vowels/ consonants/ uppercase/ lowercase characters and other than character and digit in the file.
filein = open("Mydoc1.txt",'r')
line = filein.read()
count_vow = 0
count_con = 0
count_low = 0
count_up = 0
count_digit = 0
count_other = 0
print(line)
for ch in line:
if ch.isupper():
count_up +=1
if ch.islower():
count_low += 1
if ch in 'aeiouAEIOU':
count_vow += 1
if ch.isalpha():
count_con += 1
if ch.isdigit():
count_digit += 1
if not ch.isalnum() and ch !=' ' and ch !='\n':
count_other += 1
print("Digits",count_digit)
print("Vowels: ",count_vow)
print("Consonants: ",count_con-count_vow)
print("Upper Case: ",count_up)
print("Lower Case: ",count_low)
print("other than letters and digit: ",count_other)
filein.close()
12. Write a Python code to find the size of the file in bytes, the number of lines, number of words and no. of character.
import os
lines = 0
words = 0
letters = 0
filesize = 0
for line in open("Mydoc.txt"):
lines += 1
letters += len(line)
# get the size of file
filesize = os.path.getsize("Mydoc.txt")
# A flag that signals the location outside the word.
pos = 'out'
for letter in line:
if letter != ' ' and pos == 'out':
words += 1
pos = 'in'
elif letter == ' ':
pos = 'out'
print("Size of File is",filesize,'bytes')
print("Lines:", lines)
print("Words:", words)
print("Letters:", letters)
13. Write a program that accepts a filename of a text file and reports the file's longest line.
def get_longest_line(filename):
large_line = ''
large_line_len = 0
with open(filename, 'r') as f:
for line in f:
if len(line) > large_line_len:
large_line_len = len(line)
large_line = line
return large_line
filename = input('Enter text file Name: ')
print (get_longest_line(filename+".txt"))
14. Create a binary file with the name and roll number. Search for a given roll number and display the name, if not found display appropriate message.
import pickle
def Writerecord(sroll,sname):
with open ('StudentRecord1.dat','ab') as Myfile:
srecord={"SROLL":sroll,"SNAME":sname}
pickle.dump(srecord,Myfile)
def Readrecord():
with open ('StudentRecord1.dat','rb') as Myfile:
print("\n-------DISPALY STUDENTS DETAILS--------")
print("\nRoll No.",' ','Name','\t',end='')
print()
while True:
try:
rec=pickle.load(Myfile)
print(' ',rec['SROLL'],'\t ' ,rec['SNAME'])
except EOFError:
break
def Input():
n=int(input("How many records you want to create :"))
for ctr in range(n):
sroll=int(input("Enter Roll No: "))
sname=input("Enter Name: ")
Writerecord(sroll,sname)
def SearchRecord(roll):
with open ('StudentRecord1.dat','rb') as Myfile:
while True:
try:
rec=pickle.load(Myfile)
if rec['SROLL']==roll:
print("Roll NO:",rec['SROLL'])
print("Name:",rec['SNAME'])
except EOFError:
print("Record not find..............")
print("Try Again..............")
break
def main():
while True:
print('\nYour Choices are: ')
print('1.Insert Records')
print('2.Dispaly Records')
print('3.Search Records (By Roll No)')
print('0.Exit (Enter 0 to exit)')
ch=int(input('Enter Your Choice: '))
if ch==1:
Input()
elif ch==2:
Readrecord()
elif ch==3:
r=int(input("Enter a Rollno to be Search: "))
SearchRecord(r)
else:
break
main()
15. Create a binary file with roll number, name and marks. Input a roll number and update details.
def Writerecord(sroll,sname,sperc,sremark):
with open ('StudentRecord.dat','ab') as Myfile:
srecord={"SROLL":sroll,"SNAME":sname,"SPERC":sperc,
"SREMARKS":sremark}
pickle.dump(srecord,Myfile)
def Readrecord():
with open ('StudentRecord.dat','rb') as Myfile:
print("\n-------DISPALY STUDENTS DETAILS--------")
print("\nRoll No.",' ','Name','\t',end='')
print('Percetage',' ','Remarks')
while True:
try:
rec=pickle.load(Myfile)
print(' ',rec['SROLL'],'\t ' ,rec['SNAME'],'\t ',end='')
print(rec['SPERC'],'\t ',rec['SREMARKS'])
except EOFError:
break
def Input():
n=int(input("How many records you want to create :"))
for ctr in range(n):
sroll=int(input("Enter Roll No: "))
sname=input("Enter Name: ")
sperc=float(input("Enter Percentage: "))
sremark=input("Enter Remark: ")
Writerecord(sroll,sname,sperc,sremark)
def Modify(roll):
with open ('StudentRecord.dat','rb') as Myfile:
newRecord=[]
while True:
try:
rec=pickle.load(Myfile)
newRecord.append(rec)
except EOFError:
break
found=1
for i in range(len(newRecord)):
if newRecord[i]['SROLL']==roll:
name=input("Enter Name: ")
perc=float(input("Enter Percentage: "))
remark=input("Enter Remark: ")
newRecord[i]['SNAME']=name
newRecord[i]['SPERC']=perc
newRecord[i]['SREMARKS']=remark
found =1
else:
found=0
if found==0:
print("Record not found")
with open ('StudentRecord.dat','wb') as Myfile:
for j in newRecord:
pickle.dump(j,Myfile)
def main():
while True:
print('\nYour Choices are: ')
print('1.Insert Records')
print('2.Dispaly Records')
print('3.Update Records')
print('0.Exit (Enter 0 to exit)')
ch=int(input('Enter Your Choice: '))
if ch==1:
Input()
elif ch==2:
Readrecord()
elif ch==3:
r =int(input("Enter a Rollno to be update: "))
Modify(r)
else:
break
main()
16. Remove all the lines that contain the character `a' in a file and write it to another file
f1 = open("Mydoc.txt")
f2 = open("copyMydoc.txt","w")
for line in f1:
if 'a' not in line:
f2.write(line)
print('## File Copied Successfully! ##')
f1.close()
f2.close()
f2 = open("copyMydoc.txt","r")
print(f2.read())
17. Write a program to perform read and write operation onto a student.csv file having fields as roll number, name, stream and percentage.​
import csv
with open('Student_Details.csv','w',newline='') as csvf:
writecsv=csv.writer(csvf,delimiter=',')
choice='y'
while choice.lower()=='y':
rl=int(input("Enter Roll No.: "))
n=input("Enter Name: ")
p=float(input("Enter Percentage: "))
r=input("Enter Remarks: ")
writecsv.writerow([rl,n,p,r])
print(" Data saved in Student Details file..")
choice=input("Want add more record(y/n).....")
with open('Student_Details.csv','r',newline='') as fileobject:
readcsv=csv.reader(fileobject)
for i in readcsv:
print(i)
18. Program to search the record of a particular student from CSV file on the basis of inputted name.
import csv
#input Roll number you want to search
number = input('Enter number to find: ')
found=0
#read csv, and split on "," the line
with open('Student_Details.csv') as f:
csv_file = csv.reader(f, delimiter=",")
#loop through csv list
for row in csv_file:
#if current rows index value (here 0) is equal to input, print that row
if number ==row[0]:
print (row)
found=1
else:
found=0
if found==1:
pass
else:
print("Record Not found")
19. Write a random number generator that generates random numbers between 1 and 6 (simulates a dice).
import random
import random
def roll_dice():
print (random.randint(1, 6))
print("""Welcome to my python random dice program!
To start press enter! Whenever you are over, type quit.""")
flag = True
while flag:
user_prompt = input(">")
if user_prompt.lower() == "quit":
flag = False
else:
print("Rolling dice...\nYour number is:")
roll_dice()
20. Write a program to create a library in python and import it in a program.
#Let's create a package named Mypackage, using the following steps:
#• Create a new folder named NewApp in D drive (D:\NewApp)
#• Inside NewApp, create a subfolder with the name 'Mypackage'.
#• Create an empty __init__.py file in the Mypackage folder
#• Create modules Area.py and Calculator.py in Mypackage folder with following code
# Area.py Module
import math
def rectangle(s1,s2):
area = s1*s2
return area
def circle(r):
area= math.pi*r*r
return area
def square(s1):
area = s1*s1
return area
def triangle(s1,s2):
area=0.5*s1*s2
return area
# Calculator.py Module
def sum(n1,n2):
s = n1 + n2
return s
def sub(n1,n2):
r = n1 - n2
return r
def mult(n1,n2):
m = n1*n1
return m
def div(n1,n2):
d=n1/n2
return d
# main() function
from Mypackage import Area
from Mypackage import Calculator
def main():
r = float(input("Enter Radius: "))
area =Area.circle(r)
print("The Area of Circle is:",area)
s1 = float(input("Enter side1 of rectangle: "))
s2 = float(input("Enter side2 of rectangle: "))
area = Area.rectangle(s1,s2)
print("The Area of Rectangle is:",area)
s1 = float(input("Enter side1 of triangle: "))
s2 = float(input("Enter side2 of triangle: "))
area = Area.triangle(s1,s2)
print("The Area of TriRectangle is:",area)
s = float(input("Enter side of square: "))
area =Area.square(s)
print("The Area of square is:",area)
num1 = float(input("\nEnter First number :"))
num2 = float(input("\nEnter second number :"))
print("\nThe Sum is : ",Calculator.sum(num1,num2))
print("\nThe Multiplication is : ",Calculator.mult(num1,num2))
print("\nThe sub is : ",Calculator.sub(num1,num2))
print("\nThe Division is : ",Calculator.div(num1,num2))
main()
21. Write a python program to implement sorting techniques based on user choice using a list data-structure. (bubble/insertion)
#BUBBLE SORT FUNCTION
def Bubble_Sort(nlist):
for passnum in range(len(nlist)-1,0,-1):
for i in range(passnum):
if nlist[i]>nlist[i+1]:
temp = nlist[i]
nlist[i] = nlist[i+1]
nlist[i+1] = temp
#INSERTION SORT FUNCTION
def Insertion_Sort(nlist):
for index in range(1,len(nlist)):
currentvalue = nlist[index]
position = index
while position>0 and nlist[position-1]>currentvalue:
nlist[position]=nlist[position-1]
position = position-1
nlist[position]=currentvalue
# DRIVER CODE
def main():
print ("SORT MENU")
print ("1. BUBBLE SORT")
print ("2. INSERTION SORT")
print ("3. EXIT")
choice=int(input("Enter your Choice [ 1 - 3 ]: "))
nlist = [14,46,43,27,57,41,45,21,70]
if choice==1:
print("Before Sorting: ",nlist)
Bubble_Sort(nlist)
print("After Bubble Sort: ",nlist)
elif choice==2:
print("Before Sorting: ",nlist)
Insertion_Sort(nlist)
print("After Insertion Sort: ",nlist)
else:
print("Quitting.....!")
main()
22. Take a sample of ten phishing e-mails (or any text file) and find the most commonly occurring word(s).
def Read_Email_File():
import collections
fin = open('email.txt','r')
a= fin.read()
d={ }
L=a.lower().split()
for word in L:
word = word.replace(".","")
word = word.replace(",","")
word = word.replace(":","")
word = word.replace("\"","")
word = word.replace("!","")
word = word.replace("&","")
word = word.replace("*","")
for k in L:
key=k
if key not in d:
count=L.count(key)
d[key]=count
n = int(input("How many most common words to print: "))
print("\nOK. The {} most common words are as follows\n".format(n))
word_counter = collections.Counter(d)
for word, count in word_counter.most_common(n):
print(word, ": ", count)
fin.close()
#Driver Code
def main():
Read_Email_File()
main()
23. Write a python program to implement a stack using a list data-structure.
def isempty(stk):
if stk==[]:
return True
else:
return False
def push(stk,item):
stk.append(item)
top=len(stk)-1
def pop(stk):
if isempty(stk):
return "underflow"
else:
item=stk.pop()
if len(stk)==0:
top=None
else:
top=len(stk)-1
return item
def peek(stk):
if isempty(stk):
return "underflow"
else:
top=len(stk)-1
return stk[top]
def display(stk):
if isempty(stk):
print('stack is empty')
else:
top=len(stk)-1
print(stk[top],'<-top')
for i in range(top-1,-1,-1):
print(stk[i])
#Driver Code
def main():
stk=[]
top=None
while True:
print('''stack operation
1.push
2.pop
3.peek
4.display
5.exit''')
choice=int (input('enter choice:'))
if choice==1:
item=int(input('enter item:'))
push(stk,item)
elif choice==2:
item=pop(stk)
if item=="underflow":
print('stack is underflow')
else:
print('poped')
elif choice==3:
item=peek(stk)
if item=="underflow":
print('stack is underflow')
else:
print('top most item is:',item)
elif choice==4:
display(stk)
elif choice==5:
break
else:
print('invalid')
exit()
main()
24. Write a program to implement a queue using a list data structure.
# Function to check Queue is empty or not
def isEmpty(qLst):
if len(qLst)==0:
return 1
else:
return 0
# Function to add elements in Queue
def Enqueue(qLst,val):
qLst.append(val)
if len(qLst)==1:
front=rear=0
else:
rear=len(qLst)-1
# Function to Delete elements in Queue
def Dqueue(qLst):
if isEmpty(qLst):
return "UnderFlow"
else:
val = qLst.pop(0)
if len(qLst)==0:
front=rear=None
return val
# Function to Display top element of Queue
def Peek(qLst):
if isEmpty(qLst):
return "UnderFlow"
else:
front=0
return qLst[front]
# Function to Display elements of Queue
def Display(qLst):
if isEmpty(qLst):
print("No Item to Dispay in Queue....")
else:
tp = len(qLst)-1
print("[FRONT]",end=' ')
front = 0
i = front
rear = len(qLst)-1
while(i<=rear):
print(qLst[i],'<-',end=' ')
i += 1
print()
# Driver function
def main():
qList = []
front = rear = 0
while True:
print()
print("##### QUEUE OPERATION #####")
print("1. ENQUEUE ")
print("2. DEQUEUE ")
print("3. PEEK ")
print("4. DISPLAY ")
print("0. EXIT ")
choice = int(input("Enter Your Choice: "))
if choice == 1:
ele = int(input("Enter element to insert"))
Enqueue(qList,ele)
elif choice == 2:
val = Dqueue(qList)
if val == "UnderFlow":
print("Queue is Empty")
else:
print("\n Deleted Element was : ",val)
elif choice==3:
val = Peek(qList)
if val == "UnderFlow":
print("Queue is Empty")
else:
print("Item at Front: ",val)
elif choice==4:
Display(qList)
elif choice==0:
print("Good Luck......")
break
main()
25. Write a python program to implement searching methods based on user choice using a list data-structure. (linear & binary)
#Linear Search Function Definition
def Linear_Search( lst, srchItem):
found= False
for i in range(len(lst)):
if lst[i] == srchItem:
found = True
print(srchItem, ' was found in the list at index ', i)
break
if found == False:
print(srchItem, ' was not found in the list!')
#Binary Search Definition
def binary_Search(Lst,num):
start = 0
end = len(Lst) - 1
mid = (start + end) // 2
# We took found as False that is, initially
# we are considering that the given number
# is not present in the list unless proven
found = False
position = -1
while start <= end:
if Lst[mid] == num:
found = True
position = mid
print('Number %d found at position %d'%(num, position+1))
break
if num > Lst[mid]:
start = mid + 1
mid = (start + end) // 2
else:
end = mid - 1
mid = (start + end) // 2
if found==False:
print('Number %d not found' %num)
# DRIVER CODE
def main():
print ("SEARCH MENU")
print ("1. LINEAR SERACH")
print ("2. BINARY SEARCH")
print ("3. EXIT")
choice=int(input("Enter your Choice [ 1 - 3 ]: "))
arr = [12, 34, 54, 2, 3]
n = len(arr)
if choice==1:
print("The List contains : ",arr)
num=int(input("Enter number to be searched: "))
index = Linear_Search(arr,num)
if choice==2:
arr = [2, 3,12,34,54] #Sorted Array
print("The List contains : ",arr)
num=int(input("Enter number to be searched: "))
result = binary_Search(arr,num)
main()