Error: UnboundLocalError: local variable 'generate' referenced before assignment
why it's giving me this error?
Code
import string
import random
Password = ""
lettere = string.ascii_letters
numeri = string.digits
punteggiatura = string.punctuation
def getPasswordLenght():
lenght = input("How log do you want your password...\n>>> ")
return int(lenght)
def passwordGenerator(lenght):
caratteri = ""
requestPunteggiatutaIclusa = input("Punteggiatura (YES | NO)\n>>> ")
if requestPunteggiatutaIclusa.upper() == "YES" :
caratteri = f"{lettere}{numeri}{punteggiatura}"
generate(lenght)
elif requestPunteggiatutaIclusa.upper() == "NO" :
caratteri = f"{lettere}{numeri}"
generate(lenght)
else :
print("Error")
passwordGenerator(lenght)
return Password
def generate(lenght) :
caratteri = list(caratteri)
random.shuffle(caratteri)
Password = ""
for i in range(lenght):
Password = Password + caratteri[i]
i = i + 1
return Password
passwordGenerator(getPasswordLenght())
print(Password)
Result
How log do you want your password...
8
Punteggiatura (YES | NO)
yes
Traceback (most recent call last):
File "/Users/paolo/Desktop/COde/PY/passwordGenerator.py", line 46, in <module>
passwordGenerator(getPasswordLenght())
File "/Users/paolo/Desktop/COde/PY/passwordGenerator.py", line 33, in passwordGenerator
generate(lenght)
File "/Users/paolo/Desktop/COde/PY/passwordGenerator.py", line 19, in generate
caratteri = list(caratteri)
UnboundLocalError: local variable 'caratteri' referenced before assignment
Do you know what is local variable
?
caratteri = ""
creates local variable which exists only inside passwordGenerator()
but you try to use it in generate()
when you use list(caratteri)
.
In generate()
you create also local variable when you use caratteri = list(...)
but you do this after trying to get value from caratteri
- and this gives error local variable 'caratteri' referenced before assignment
.
Better use variables explicitly - send them as arguments
generate(lenght, caratteri)
And the same problem you may have with Password
.
You created global variable Password = ""
but inside generate()
you create local Password = ""
. In generate()
you could use global Password
to work with global Password
instead of creating local Password
but beetter use value which you return from function
Password = generate(lenghtt, caratteri)
My version with many other changes
import string
import random
# --- functions ---
def ask_questions():
length = input("Password length\n>>> ")
length = int(length)
# In Linux it is popular to use upper case text in `[ ]`
# to inform user that if he press only `ENTER`
# then system will use this value as default answer.
# I inform user that `N` is default answer.
# I don't like long answers like `yes`, `no` but short `y`, n`
# and many program in Linux also use short `y`,`n`
answer = input("Use punctuations [y/N]\n>>> ")
answer = answer.upper()
characters = string.ascii_letters + string.digits
if answer == "Y":
characters += string.punctuation
elif answer != "" and answer != "N":
print("Wrong answer. I will use default settings")
return length, characters
def generate(lenght, characters):
characters = list(characters)
random.shuffle(characters)
password = characters[0:lenght]
password = ''.join(password)
return password
# --- main ---
# I seperate questions and code which generates password
# and this way I could use `generate` with answers from file or stream
length, characters = ask_questions()
password = generate(length, characters)
print(password)
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