[Tutor] List of ints

[Albert-Jan Roskam]

----- Original Message -----

> From: Mark Lawrence <breamoreboy at yahoo.co.uk>
> To: tutor at python.org
> Cc: 
> Sent: Wednesday, March 4, 2015 10:20 AM
> Subject: Re: [Tutor] List of ints
> 
> On 04/03/2015 00:25, Steven D'Aprano wrote:
>>  On Tue, Mar 03, 2015 at 04:50:41PM +1000, Phil wrote:
>> 
>>>  count [0] += 1
>>> 
>>>  This fails with the following error;
>>> 
>>>  TypeError: 'int' object is not iterable
>> 
>>  I know that others have already solved the problem, but here is
>>  something which might help you solve similar problems in the future.
>>  The way to debug simple things like this is quite simple:
>> 
>>  print count[0]
>> 
>>  which will show you that count[0] is a list [0], not an int 0, and you
>>  are trying to add [0]+1 which doesn't work.
>> 
>>  Never under-estimate the usefulness of a few print calls when debugging.
>> 
>> 
> 
> About time we threw in the use of the interactive interpreter for trying 
> code snippets as well, just for good measure :)


Perhaps both at the same time using the PDB debugger from within IPython?

%run -d -b <line number> myscript.py

d = debug, b = breakpoint

inside pdb: c = continue, q = quit, p = print, r = return value of current function, s = step, and more: https://docs.python.org/2/library/pdb.html