Respuesta :
Answer:
Explanation:
f=open('email.dat','rb')
d=pickle.load(f)
f.close()
except:
d={}
while True:
print('\n1. Find a email address')
print('2. Add name and email address')
print('3. Change an email address')
print('4. Delete an email address')
print('5. Exit\n')
choice=input('\nEnter a choice: ')
if choice:
choice=int(choice)
else:
print('\nEnter a number')
continue
if choice == 1:
while True:
name=input('\nEnter the name ')
if name:
if name in d:
print('\n%s is the email id of %s \n' % (d[name],name))
break
else:
print('\n Email not found \n')
break
else:
print('\nName cannot be empty\n')
continue
elif choice==2:
while True:
name=input('\nEnter the name ')
if name:
break;
else:
print('\nName cannot be empty \n')
continue
while True:
email=input('\nEnter the email address ')
if email:
d[name]=email
break
else:
print('\nEmail cannot be empty\n')
continue
elif choice==3:
while True:
name=input('\nEnter the name to change the email address ')
if name:
if name in d:
email=input('\nEnter the new email address ')
d[name]=email
print('\nEmail address changed \n')
break;
else:
print('\nName not found \n')
break
else:
print('\nName cannot be empty \n')
continue
elif choice == 4:
while True:
name=input('\nEnter the name to remove ')
if name:
if name in d:
del d[name]
print('\nName and Email address removed \n ')
break;
else:
print('\nName not found \n')
break
else:
print('\nName cannot be empty\n')
continue
elif choice == 5:
f=open('email.dat','wb')
pickle.dump(d,f)
f.close()
sys.exit()
else:
print('\nEnter a valid choice ')
