NameError: name 'guess' is not defined

[willkab6]

I am very new to both programming and Pyhton and while trying to do
some practice using A byte of python an Error pops up on the IDLE
shell. I am using windows XP. PLease see below.
while running:
guess = int(raw_input('Enter an integer : '))

if guess == number:
print 'Congratulations, you guessed it.'
running = False # this causes the while loop to stop
elif guess < number:
print 'No, it is a little higher than that.'
else:
print 'No, it is a little lower than that.'
else:
print 'The while loop is over.'
# Do anything else you want to do here

print 'Done'

After typing the above as the book says, I get the error NameError:
name 'guess' is not defined
What Am I doing wrong?

 

[Diez B. Roggisch]

I am very new to both programming and Pyhton and while trying to do
some practice using A byte of python an Error pops up on the IDLE
shell. I am using windows XP. PLease see below.
while running:
guess = int(raw_input('Enter an integer : '))

if guess == number:
print 'Congratulations, you guessed it.'
running = False # this causes the while loop to stop
elif guess < number:
print 'No, it is a little higher than that.'
else:
print 'No, it is a little lower than that.'
else:
print 'The while loop is over.'
# Do anything else you want to do here

print 'Done'

After typing the above as the book says, I get the error NameError:
name 'guess' is not defined
What Am I doing wrong?

You most certainly did NOT write the above - because in Python
whitespace is significant, and thus the above would result in a
syntax-error because you need to have things like

if condition:
something()

and not

if condition:
something()

So unless you post what you *really* entered (and make sure your
NG-client/mailclient doesn't eat leading whitespace), nobody will be
able to help you.

Diez

 

[Gary Herron]

I am very new to both programming and Pyhton and while trying to do
some practice using A byte of python an Error pops up on the IDLE
shell. I am using windows XP. PLease see below.
while running:
guess = int(raw_input('Enter an integer : '))

if guess == number:
print 'Congratulations, you guessed it.'
running = False # this causes the while loop to stop
elif guess < number:
print 'No, it is a little higher than that.'
else:
print 'No, it is a little lower than that.'
else:
print 'The while loop is over.'
# Do anything else you want to do here

print 'Done'

After typing the above as the book says, I get the error NameError:
name 'guess' is not defined
What Am I doing wrong?

You are not describing the problem accurately. The above program would
not even start *running*. It would produce an
IndentationError: expected an indented block
on the second line. If you did manage to get the to get the program
entered with correct indentation, it would gave a NameError on the
variable named running not on guess.

So now: Tell us what really happened, and perhaps your question can be
answered.

Hint:

Each of the lines that end in a colon start a block of code which must
be indented.

Any variable used in a calculation must be given a value *before* the
calculation is carried out.

I think this might be what you were trying to do (untested):


number = 12345 # Defines the number variable before using

while True:
guess = int(raw_input('Enter an integer : '))

if guess == number:
print 'Congratulations, you guessed it.'
break # this causes the while loop to stop
elif guess < number:
print 'No, it is a little higher than that.'
else:
print 'No, it is a little lower than that.'

print 'The while loop is over.'
print 'Done'


Gary Herron

 

[Dan Bishop]

(e-mail address removed) schrieb:







You most certainly did NOT write the above - because in Python
whitespace is significant, and thus the above would result in a
syntax-error because you need to have things like

if condition:
something()

and not

if condition:
something()

So unless you post what you *really* entered (and make sure your
NG-client/mailclient doesn't eat leading whitespace), nobody will be
able to help you.

If your newsclient *does* mangle whitespace, you can post your code
like:

exec """
number = 12345 # Defines the number variable before using
while True:
$guess = int(raw_input('Enter an integer : '))
$if guess == number:
$$print 'Congratulations, you guessed it.'
$$break # this causes the while loop to stop
$elif guess < number:
$$print 'No, it is a little higher than that.'
$else:
$$print 'No, it is a little lower than that.'
print 'The while loop is over.'
print 'Done'
""".replace("$", "\t")