Question: 11
Write a python program to maintain book details like book code, book title and price using stacks data structures? (implement push(), pop() and traverse() functions)
Sol:
"""
push
pop
traverse
"""
book=[]
def push():
bcode=input("Enter bcode ")
btitle=input("Enter btitle ")
price=input("Enter price ")
bk=(bcode,btitle,price)
book.append(bk)
def pop():
if(book==[]):
print("Underflow / Book Stack in empty")
else:
bcode,btitle,price=book.pop()
print("poped element is ")
print("bcode ",bcode," btitle ",btitle," price ",price)
def traverse():
if not (book==[]):
n=len(book)
for i in range(n-1,-1,-1):
print(book[i])
else:
print("Empty , No book to display")
while True:
print("1. Push")
print("2. Pop")
print("3. Traversal")
print("4. Exit")
ch=int(input("Enter your choice "))
if(ch==1):
push()
elif(ch==2):
pop()
elif(ch==3):
traverse()
elif(ch==4):
print("End")
break
else:
print("Invalid choice")
Output:
1. Push
2. Pop
3. Traversal
4. Exit
Enter your choice 1
Enter bcode 101
Enter btitle python
Enter price 254
1. Push
2. Pop
3. Traversal
4. Exit
Enter your choice 3
(‘101’, ‘python’, ‘254’)
1. Push
2. Pop
3. Traversal
4. Exit
Enter your choice
Question:12
Write a python program to maintain employee details like empno,name and salary using Queues data structure? (implement insert(), delete() and traverse() functions)
Sol:
#queue implementation (using functions)
#program to create a queue of employee(empno,name,sal).
"""
add employee
delete employee
traverse / display all employees
"""
employee=[]
def add_element():
empno=input("Enter empno ")
name=input("Enter name ")
sal=input("Enter sal ")
emp=(empno,name,sal)
employee.append(emp)
def del_element():
if(employee==[]):
print("Underflow / Employee Stack in empty")
else:
empno,name,sal=employee.pop(0)
print("poped element is ")
print("empno ",empno," name ",name," salary ",sal)
def traverse():
if not (employee==[]):
n=len(employee)
for i in range(0,n):
print(employee[i])
else:
print("Empty , No employee to display")
while True:
print("1. Add employee");
print("2. Delete employee");
print("3. Traversal")
print("4. Exit")
ch=int(input("Enter your choice "))
if(ch==1):
add_element()
elif(ch==2):
del_element();
elif(ch==3):
traverse()
elif(ch==4):
print("End")
break
else:
print("Invalid choice")
Output:
1. Add employee
2. Delete employee
3. Traversal
4. Exit
Enter your choice 1
Enter empno 101
Enter name Amit
Enter sal 45000
1. Add employee
2. Delete employee
3. Traversal
4. Exit
Enter your choice 3
(‘101’, ‘Amit’, ‘45000’)
1. Add employee
2. Delete employee
3. Traversal
4. Exit
Enter your choice
Question:13
Write a python program to read a file named “article.txt”, count and print total alphabets in the file?
Sol:
def count_alpha():
lo=0
with open("story.txt") as f:
while True:
c=f.read(1)
if not c:
break
print(c,end='')
if((c>='A' and c<='Z') or (c>='a' and c<='z')):
lo=lo+1
print("total lower case alphabets ",lo)
#function calling
count_alpha()
Output:
Hello how are you
12123
bye
total lower case alphabets 17
>>>
Question:14
Write a python program to read a file named “article.txt”, count and print the following:
(i). length of the file(total characters in file)
(ii).total alphabets
(iii). total upper case alphabets
(iv). total lower case alphabets
(v). total digits
(vi). total spaces
(vii). total special characters
Sol:
def count():
a=0
ua=0
la=0
d=0
sp=0
spl=0
with open("story.txt") as f:
while True:
c=f.read(1)
if not c:
break
print(c,end='')
if((c>='A' and c<='Z') or (c>='a' and c<='z')):
a=a+1
if((c>='A' and c<='Z') or (c>='a' and c<='z')):
a=a+1
if(c>='A' and c<='Z'):
ua=ua+1
else:
la=la+1
elif(c>='0' and c<='9'):
d=d+1
elif(c==' '):
sp=sp+1
else:
spl=spl+1
print("total alphabets ",a)
print("total upper case alphabets ",ua)
print("total lower case alphabets ",la)
print("total digits ",d)
print("total spaces ",sp)
print("total special characters ",spl)
# function calling
count()
Output:
Question: 15
Write a python program to read a file named “story.txt”, count and print total words starting with “a” or “A” in the file?
Sol:
def count_words():
w=0
with open("story.txt") as f:
for line in f:
for word in line.split():
if(word[0]=="a" or word[0]=="A"):
print(word)
w=w+1
print("total words starting with 'a' are ",w)
# function calling
count_words()
Output:
are
Ankur
Amit
Aman
total words starting with ‘a’ are 4
>>>
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