Question

8.4 in python

function that checks whether a string is a valid password. Suppose the pas 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 valid password if the rules are followed or invalid password otherwise (Occurrences of a specified character) Write a function that finds the number of occurrences of a specified character in a string using the following header: def count(s, ch) 8.4 The str class has the count method. Implement your method without using the count method. For example, count ("Welcome", 'e) returns 2. Write a test program that prompts the user to enter a string followed by a character and dis- plays the number of occurrences of the character in the string. (Occurrences of a specified string) Write a function that counts the occurrences of a specified non-overlapping string s2 in another string sl using the following header def count(s1, s2): **8.5 8-16

Answer 1

Here is code:

def count(userString,occ):

times = 0

for i in range(0, len(userString)):

if userString[i] == occ:

times = times + 1

return times

Sample code to test:

def count(userString,occ):

times = 0

for i in range(0, len(userString)):

if userString[i] == occ:

times = times + 1

return times

userString = input("Enter a string : ")

occ = input("Enter find string : ")

print ("Number of characters : ", count(userString,occ))

Output: