Re: [Tutor] syntax error with raw input
On Wed, Nov 12, 2014 at 12:08 PM, Vaibhav Banait
wrote:
> Hi
> I am new to python. I learnt (!) using raw_input a day back. Attempt to use
> has resulted in error. I am not able to spot a problem in syntax. I am using
> python 3.4.2. Kindly help
>
>
> a = raw_input("Write down your name: ")
>
> Output:
>
>
> Traceback (most recent call last):
> File "", line 1, in
> a = raw_input("Write down your name: ")
> NameError: name 'raw_input' is not defined
>
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> Tutor maillist - Tutor@python.org
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In Python 3, raw_input() was renamed to input().
a = input("Write down your name: ")
Note that input() is also a thing in Python 2, but you shouldn’t use
that one for security reasons. Python 3’s is fine though.
--
Chris Warrick
Re: [Tutor] syntax error with raw input
On 12/11/14 11:08, Vaibhav Banait wrote:
Hi
I am new to python. I learnt (!) using raw_input a day back. Attempt to
use has resulted in error. I am not able to spot a problem in syntax. I
am using python 3.4.2. Kindly help
Looks like you are reading a v2 book/tutorial but using v3.
In v3 several key changes were made to Python including the renaming of
raw_input() to input().
The other big change was making print a function so you now *must* put
parentheses around anything you want to print.
ie
print 'hello' # Python v2
becomes
print('hello') # python v3
There are numerous other small changes so it would be better for you to
either find a v3 tutorial (you could try mine! :-) or install Python
v2.7 while you are learning.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.flickr.com/photos/alangauldphotos
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Re: [Tutor] syntax error with raw input
Slightly hijacking this thread a bit, specifically Alan's reply, if anyone
is averse to installing multiple versions of Python on their computers, you
can always access a Python interpreter from a browser window.
Here are a collection I've put together. Most are Python 2, but the top
pair also support Python 3:
- http://ideone.com (2.x & 3.x)
- http://colabv6.dan.co.jp/lleval.html (2.x & 3.x)
- http://doc.pyschools.com/console
- http://repl.it/languages/Python
- http://skulpt.org (pure JS implementation; allows turtle)
- http://pythonwebconsole.thomnichols.org
- http://shell.appspot.com (Google App Engine + libraries)
- http://codepad.org
- http://lotrepls.appspot.com
- http://datamech.com/devan/trypython/trypython.py
Cheers,
--Wesley
On Wed, Nov 12, 2014 at 9:11 AM, Alan Gauld
wrote:
> On 12/11/14 11:08, Vaibhav Banait wrote:
>
>> Hi
>> I am new to python. I learnt (!) using raw_input a day back. Attempt to
>> use has resulted in error. I am not able to spot a problem in syntax. I
>> am using python 3.4.2. Kindly help
>>
>
> Looks like you are reading a v2 book/tutorial but using v3.
>
> In v3 several key changes were made to Python including the renaming of
> raw_input() to input().
>
> The other big change was making print a function so you now *must* put
> parentheses around anything you want to print.
>
> ie
>
> print 'hello' # Python v2
>
> becomes
>
> print('hello') # python v3
>
> There are numerous other small changes so it would be better for you to
> either find a v3 tutorial (you could try mine! :-) or install Python v2.7
> while you are learning.
>
>
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
> http://www.flickr.com/photos/alangauldphotos
>
>
> ___
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription options:
> https://mail.python.org/mailman/listinfo/tutor
>
--
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"A computer never does what you want... only what you tell it."
+wesley chun : wescpy at gmail : @wescpy
Python training & consulting : http://CyberwebConsulting.com
"Core Python" books : http://CorePython.com
Python blog: http://wescpy.blogspot.com
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Re: [Tutor] syntax error with raw input
On Wed, Nov 12, 2014 at 04:38:51PM +0530, Vaibhav Banait wrote: > Hi > I am new to python. I learnt (!) using raw_input a day back. Attempt to > use has resulted in error. I am not able to spot a problem in syntax. What makes you think it is a problem with syntax? This is what happens when you have a syntax error: py> 23 42 + File "", line 1 23 42 + ^ SyntaxError: invalid syntax Look at the error you get instead: it doesn't say "SyntaxError", does it? It says "NameError". NameError: name 'raw_input' is not defined The reason is that in Python 3, "raw_input" has been renamed to just "input". -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
