Re: [IPython 5] [Docs] Custom Terminal Prompts

It seems to be unrelated to the prompt customisation stuff. I removed the
code from my last email, so now have the standard prompt again, but the
execution count still fails to update, even though the prompt is working
properly:

​    ​
In [*1*]: *import* IPython

​    ​
In [*2*]: Shell = IPython.terminal.interactiveshell.TerminalInteractiveShell

​    ​
In [*3*]: shell = Shell()

​    ​
In [*4*]: shell.execution_count

​    ​
Out[*4*]: 1

​    ​
In [*5*]: shell.execution_count

    Out[*5*]: 1

Maybe the prompt class is supposed to increment the count whenever the `
in_prompt_tokens` method is called, but I need to get to bed. It's 3am here.

G'night,

-- Carl Smith
[email protected]

On 11 July 2016 at 02:27, Carl Smith <[email protected]> wrote:

> Just to help move things along, this is what I have. It works, except for
> the input number always being `1`. I don't know much about some of the
> parts, so have no idea why the count doesn't increment.
>
>     import IPython
>     from pygments.token import Token
>
>     Prompts = IPython.terminal.prompts.Prompts
>     Shell = IPython.terminal.interactiveshell.TerminalInteractiveShell
>
>     class CustomPrompts(Prompts):
>
>         def in_prompt_tokens(self, cli=None): return [
>             (Token.Prompt, "CustomIn["),
>             (Token.PromptNum, str(self.shell.execution_count)),
>             (Token.Prompt, "]: ")
>             ]
>
>     get_ipython().prompts = CustomPrompts(Shell())
>
> This code creates an input prompt like `CustomIn[1]: `, but the number is
> always `1`. Interestingly, the output prompt, which is inherited
> unmodified, is also stuck at `1` now. Everything works correctly; you can
> input code and so on, but the execution count never updates.
>
> If anyone has any ideas...
>
> Best,
>
> -- Carl Smith
> [email protected]
>
> On 11 July 2016 at 00:20, Carl Smith <[email protected]> wrote:
>
>> Thanks Fernando, but please don't put yourself out on my account.
>> Obviously, it's something that needs figuring out, but there's no urgency
>> here.
>>
>> Best,
>>
>> -- Carl Smith
>> [email protected]
>>
>> On 11 July 2016 at 00:15, Fernando Perez <[email protected]> wrote:
>>
>>> On Sun, Jul 10, 2016 at 4:11 PM, Carl Smith <[email protected]>
>>> wrote:
>>>
>>>> No problem at all, Fernando.
>>>>
>>>
>>> Great, thanks!
>>>
>>>
>>>> I did have a go at it based on the code Thomas pointed to, but couldn't
>>>> figure out how to use the reference to `self.shell.execution_count`. When
>>>> it's used directly, as it is in the IPython source (passed through `str`),
>>>> you end up with something like this:
>>>>
>>>>     In [<traitlets.traitlets.Int at 0x104800b70>]:
>>>>
>>>> Using the `default_value` and `default_value_repr` methods, gives you
>>>> the number, but it was always `1`, no matter what the actual input number
>>>> was.
>>>>
>>>
>>> Mmh, I'm afraid I haven't really done any significant prompt
>>> customizations in years, way before we made the system traitlets-based... I
>>> don't have a quick solution handy.  But let's see if someone else can pitch
>>> in and we get a solution, otherwise I'll try to dig in later...
>>>
>>> --
>>> Fernando Perez (@fperez_org; http://fperez.org)
>>> fperez.net-at-gmail: mailing lists only (I ignore this when swamped!)
>>> fernando.perez-at-berkeley: contact me here for any direct mail
>>>
>>> _______________________________________________
>>> IPython-dev mailing list
>>> [email protected]
>>> https://mail.scipy.org/mailman/listinfo/ipython-dev
>>>
>>>
>>
>

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