[IPython-dev] [IPython 5] [Docs] Custom Terminal Prompts

[Matthias Bussonnier]

https://github.com/asmeurer/iterm2-tools. Might be a good resource if you
looks at (unfinished) PR.

This week is SciPy, so I'll be low bandwidth, but if you issue a draft
example PR, I can an try to review.
-- 
M
On Jul 10, 2016 19:04, "Carl Smith" <carl.input at gmail.com> wrote:

> 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
> carl.input at gmail.com
>
> On 11 July 2016 at 02:27, Carl Smith <carl.input at gmail.com> 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
>> carl.input at gmail.com
>>
>> On 11 July 2016 at 00:20, Carl Smith <carl.input at gmail.com> 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
>>> carl.input at gmail.com
>>>
>>> On 11 July 2016 at 00:15, Fernando Perez <fperez.net at gmail.com> wrote:
>>>
>>>> On Sun, Jul 10, 2016 at 4:11 PM, Carl Smith <carl.input at gmail.com>
>>>> 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
>>>> IPython-dev at scipy.org
>>>> https://mail.scipy.org/mailman/listinfo/ipython-dev
>>>>
>>>>
>>>
>>
>
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