Some Web sites impose certain rules for passwords. Write a function that checkswhether a string is a valid password. Suppose the password rules are as follows:A password must have at least eight characters. A password must consist of only letters and digits. A password must contain at least two digits. Write a program that prompts the user to enter a password and displays validpassword if the rules are followed or invalid password otherwise.

def check_password (pwd):

c=0

d=0

for i in pwd:

if (i>='a' and i='A' and i<='Z'):

c+=1

elif i>='0' and i<='9':

d+=1

c+=1

if len (pwd) = =c and d>=2 and len (pwd) >=8:

print ("valid password")

else:

print ("Invalid password")

ps=input ("Enter password for checking : ")

check_password (ps)

Explanation:

Loop through the password and check if it contains any alphabet. Increment the counter if it contains any alphabet. If it contains a number, increment both c and d variables. Finally display the relevant message.