These are my two def functions:
def valid_username(username):
# implement the function here
while True:
try:
username = input("Username: ")
if len(username) < 8:
print ("Sorry, the username must be at least 8 characters long.")
if username.isalnum() == False:
print ("Sorry, your name can only contain alpha numeric characters")
numupper = 0
for c in username:
if c.isupper() == True:
numupper += 1
if numupper > 0:
print ("You have at least 1 uppercase in this username.")
else:
print ("You have no uppercase in this username.")
numlower = 0
for d in username:
if d.islower() == True:
numlower +=1
if numlower > 0:
print ("You have at least 1 lowercase in this username.")
else:
print ("You have no lowercase in this username.")
numdigit = 0
for e in username:
if e.isdigit() == True:
numdigit += 1
if numdigit > 0:
print ("You have at least one digit in this username.")
else:
print("You have no digits in this username.")
continue
except:
print ("Sorry, not valid. Try again.")
else:
print ("Thank you for your input")
break
def valid_password(password, username):
# implement the function here
while True:
try:
password = input("Password: ")
if username in password:
print ("That's not secure at all.")
if len(password) < 8:
print ("Sorry, the password must be at least 8 characters long.")
if password.isalnum() == False:
print ("Sorry, your password can only contain alpha numeric characters")
numupper = 0
for c in password:
if c.isupper() == True:
numupper += 1
if numupper > 0:
print ("You have at least 1 uppercase in this password.")
else:
print ("You have no uppercase in this password.")
numlower = 0
for d in password:
if d.islower() == True:
numlower +=1
if numlower > 0:
print ("You have at least 1 lowercase in this password.")
else:
print ("You have no lowercase in this password.")
numdigit = 0
for e in password:
if e.isdigit() == True:
numdigit += 1
if numdigit > 0:
print ("You have at least one digit in this password.")
else:
print("You have no digits in this password.")
continue
except:
print ("Sorry, not valid. Try again.")
else:
print ("Thank you for your input")
break
my main program is this:
username = input("Username: ")
result, reason = uservalidation.valid_username(username)
if not(result):
print (reason)
else:
password = input("Password: ")
pwresult, pwreason = uservalidation.valid_password(password, username)
if not(pwresult):
print (pwreason)
else:
print ("Username and Password combination is valid!")
when I run it I get the following:
Username: d
Username: user
Sorry, the username must be at least 8 characters long.
You have no uppercase in this username.
You have at least 1 lowercase in this username.
You have no digits in this username.
Username: craig2345
You have no uppercase in this username.
You have at least 1 lowercase in this username.
You have at least one digit in this username.
Thank you for your input
Traceback (most recent call last):
File "C:/Users/Si Hong/Desktop/pythontest/HuangSiHong_Assign8_part3.py", line 7, in <module>
result, reason = uservalidation.valid_username(username)
TypeError: 'NoneType' object is not iterable
>>>
I’m having trouble figuring out why when I type enter in the first value for username, it doesn’t trigger the function, but does it after the 2nd time I enter it in, and also I am not sure how to solve the nonetype error issue, if someone can explain this to me, that would be great thank you so much!
If a function doesn’t have a value explicitly returned then it implicitly returns
None, which cannot be applied to tuple unpacking this way.