Horribly noobful string question
Hi Everyone, My first post here as I just begin to learn programming in general and python in particular. I have all the noobie confused questions, but as I work thru the tutorials I'm sure I'll find most my answers. This one is eluding me tho... I am working in the tutorials, writing scripts as presented and then modifying and expanding on my own to try to learn. I'm working with one that asks the user to 'guess a number I'm thinking', and with simple while loop, flow control and operands, returning an answer to guess again or you got it. I've added a 'playagain' function I've got working, but what I want is to stop the program from crashing when someone enters a string value instead of a int value. I know strings are immutable, and they can be changed to an int equivalent, but I just want the script to recognize the input as a string and print a simple "that's not a number, try again' type of message. I can't find the syntax to include in the if/elif/else block to include a line that says something like, elif guess == print "that's not a number! please guess again!" I know that's not right, but can you see what I'm looking for and offer a suggestion? Thanks in advance all. -- http://mail.python.org/mailman/listinfo/python-list
Re: Horribly noobful string question
"Xavier Morel" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Fredrik Lundh wrote:
>> "SeNTry" wrote:
>>
>>> My first post here as I just begin to learn programming in general and
>>> python in particular. I have all the noobie confused questions, but as
>>> I
>>> work thru the tutorials I'm sure I'll find most my answers.
>>>
>>> This one is eluding me tho... I am working in the tutorials, writing
>>> scripts
>>> as presented and then modifying and expanding on my own to try to learn.
>>> I'm working with one that asks the user to 'guess a number I'm
>>> thinking',
>>> and with simple while loop, flow control and operands, returning an
>>> answer
>>> to guess again or you got it. I've added a 'playagain' function I've
>>> got
>>> working, but what I want is to stop the program from crashing when
>>> someone
>>> enters a string value instead of a int value. I know strings are
>>> immutable,
>>> and they can be changed to an int equivalent, but I just want the script
>>> to
>>> recognize the input as a string and print a simple "that's not a number,
>>> try
>>> again' type of message. I can't find the syntax to include in the
>>> if/elif/else block to include a line that says something like,
>>
>> assuming you're using raw_input() to get the guess, you always
>> have a string (in python's sense of that word).
>>
>> what you seem to want is to check if the string contains a number
>> or not. here's one way to do this:
>>
>> guess = raw_input("make a guess: ")
>> if guess == secret:
>> print "congratulations!"
>> elif not guess.isdigit():
>> print "that's not a number! please guess again!"
>> ...
>>
>
> that, or just write something like
>
> guess = raw_input("Make your guess > ")
> try:
> if int(guess) == secret:
> # ok
> except ValueError:
> # no good
>>
>> assuming you're using raw_input() to get the guess, you always
>> have a string (in python's sense of that word).
>>
>> what you seem to want is to check if the string contains a number
>> or not. here's one way to do this:
>>
>> guess = raw_input("make a guess: ")
>> if guess == secret:
>> print "congratulations!"
>> elif not guess.isdigit():
>> print "that's not a number! please guess again!"
>> ...
>>
>
> that, or just write something like
>
> guess = raw_input("Make your guess > ")
> try:
> if int(guess) == secret:
> # ok
> except ValueError:
> # no good
Sry for late reply, I've been out of town. Thanks for the responses, I'm
just sitting down to try these out. I'm kind of surprised there's not a
more obvious way to handle simply identifying strings.
Anyways, here's the original code snippet from a tut. and then my modified
effort. I was using input instead of raw_input. Looking at it now I'm not
even sure why I did some of the stuff I did HAHA! I just made functions for
convenience and practice. I'm sure it's laughable, but maybe you can see
what I was doing and tell me what other errors I made just for learning...
Everything seems to work well, except when the playagain function in my
modified code gets a '2' input to quit, it prints 'aw, ok bye then' and then
the next line is the print from the loopfunc if statement, "looping while
statement now complete". If I remove the again="" line in the playagain
function, it prints 2 times... wierd. I put this in there because I
suspected that the variable was remaining and wanted to clear it at the
start of the function, but I've now read that the variable in a function is
destroyed when the function ends... is this right? My brain hurts...
ORIGINAL
number = 24
guess = int(raw_input('Enter an integer : '))
if guess == number:
print 'Congratulations, you guessed it.' # New block starts here
print "(but you do not win any prizes!)" # New block ends here
elif guess < number:
print 'No, it is a little higher than that' # Another block
# You can do whatever you want in a block ...
else:
print 'No, it is a little lower than that'
# you must have guess > number to reach here
print 'Done'
# This last statement is always executed
Re: Horribly noobful string question
SRY, that last bit of code got messed up. Hopefully it will look right
now...
#define two functions first, then use them.
def loopfunc(looping):
while looping:
guess= input("guess a number. see if you can guess what I'm thinking")
if guess == number:
print "you got it!"
looping=False
playagain("")
print "looping while statement now complete"
elif guess < number:
print "nope, a little higher!"
else:
print "no, a little lower!"
def playagain(again):
again=""
again= input("would you like to play again? type '1' for yes and '2' for
no")
if again==1:
print "great!"
loopfunc(True)
elif again==2:
print "aww! Ok, bye then"
return
else:
print "that's not a 1 or a 2! Try again!"
playagain("")
number=24
loopfunc(True)
>
>
--
http://mail.python.org/mailman/listinfo/python-list
Any good Python forums?
Hello, Are there any good active python forums online? Especially any forum that has an uber-noob section! -- http://mail.python.org/mailman/listinfo/python-list
Re: Any good Python forums?
"SeNTry" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Hello, > > Are there any good active python forums online? Especially any forum that > has an uber-noob section! > Hey, thanks all! I know this is a good location, you guys seem to be real patient with newb questions, but I think I'm even newbier than the beginners here! I just like forums better than newsgroups because I can search easier and replies bring a post back to top so it stays active. A quick etiquette question here, it's been a looonnng time since I used newsgroups much. I asked a question and got a couple replies and then posted a follow-up, but it's buried now and I don't think I'll get anymore replies. Should I post follow-ups as new posts, or just hope someone notices the added thread and replies? Also, I'm definitely trying to write the code first, so if I post here, I'll show my examples of how badly python can be written. -- http://mail.python.org/mailman/listinfo/python-list
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