Program:13
Read a text file and display the number of vowels/consonants/uppercase/lowercase characters in the file.
f=open("poem.txt","r")
vowels='aeiouAEIOU'
v=0
c=0
u=0
l=0
for i in f.read():
if i.isalpha():
if i.isupper():
u=u+1
else:
l=l+1
if i in vowels:
v=v+1
else:
c=c+1
print("Vowels=",v)
print("consonants=",c)
print("uppercase letters=",u)
print("lowercase letters=",l)
f.close()
Program:14
Remove all the lines that contain the character ‘a’ in a file and write it to another file.
f=open("poem.txt","r")
f1=open("new.txt","w")
for line in f.readlines():
if 'a' not in line:
f1.write(line)
f.close()
f1.close()
Program:15
Create a binary file with name and roll number. Search for a given roll number and display the name, if not found display appropriate message.
import pickle
fh=open("student.dat","wb")
lst=[]
try:
while True:
r=int(input('enter roll no.: '))
n=input('enter name: ')
lst=[r,n]
pickle.dump(lst,fh)
ch=input('do you want to cont')
if ch=='Y' or ch=='y':
continue
else:
break
except EOFError:
fh.close()
fh=open("student.dat","rb")
r=int(input('enter the roll number to search'))
lst1=[]
z=0
try:
while True:
lst1=pickle.load(fh)
if lst1[0]==r:
print(lst1[1])
z=1
except EOFError:
if z==0:
print('record not found')
else:
print('search successful')
fh.close()
