Re: How can I get/save Pandas DataFrame help content?

[Peter Otten]

Robert wrote:

> Hi,
> 
> When I use Enthought/Canopy, help(DataFrame) has so much content that it
> exceeds the display buffer, i.e. its head is cut off as I go up to see it.
> I would like to know whether there is a way similar to Linux redirection
> to save the help DataFrame content to a file?
> 
> I have search on-line Pandas DataFrame web page. Surprisingly, it has much
> less content than help(DataFrame) command.
> 
> If there is no way to save the content to a file, do you know where I can
> get the full help DataFrame content on a web page?

On the commandline start a webserver with

python -m pydoc -p 8000

and then point your browser to

http://localhost:8000/pandas.core.frame.html#DataFrame

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Re: How can I get/save Pandas DataFrame help content?

[Robert Kern]

On 2015-12-17 04:09, Steven D'Aprano wrote:

On Thursday 17 December 2015 13:48, Robert wrote:


Hi,

When I use Enthought/Canopy, help(DataFrame) has so much content that it
exceeds the display buffer, i.e. its head is cut off as I go up to see it.



Step 1: report this as a bug to Enthought and/or the Python bug tracker.
help(DataFrame) should automatically choose a pager such as `less` on Linux
or equivalent (`more` I think?) on Windows.


I suspect that he is using the embedded IPython console in the Canopy IDE, so 
it's more of an issue that help() knows that it's not in a true terminal so it 
doesn't page. If he had been using python at the terminal, help() would have 
indeed used the appropriate terminal pager.


Robert, in the IPython console, you can also use a special syntax to get the 
content. The IPython console widget does know how to page this:


  In [1]: pandas.DataFrame?

http://ipython.readthedocs.org/en/stable/interactive/reference.html#dynamic-object-information

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco

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Re: How can I get/save Pandas DataFrame help content?

[Chris Angelico]

On Thu, Dec 17, 2015 at 1:48 PM, Robert  wrote:
> Hi,
>
> When I use Enthought/Canopy, help(DataFrame) has so much content that it
> exceeds the display buffer, i.e. its head is cut off as I go up to see it.
> I would like to know whether there is a way similar to Linux redirection to
> save the help DataFrame content to a file?

If you use command-line Python (by just running 'python' or 'python3'
in your shell), you should be able to use help() with a More pager.

ChrisA
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Re: How can I get/save Pandas DataFrame help content?

[Steven D'Aprano]

On Thursday 17 December 2015 13:48, Robert wrote:

> Hi,
> 
> When I use Enthought/Canopy, help(DataFrame) has so much content that it
> exceeds the display buffer, i.e. its head is cut off as I go up to see it.


Step 1: report this as a bug to Enthought and/or the Python bug tracker. 
help(DataFrame) should automatically choose a pager such as `less` on Linux 
or equivalent (`more` I think?) on Windows.

Step 2: in the meantime, while you wait for Enthought to fix this, you can 
try any of these:

(a) open the regular Python interactive interpreter (do you need help with 
that?);  once you have the >>> prompt, import the module that DataFrame 
comes from, then run help:


import whatever
help(whatever.DataFrame)


The regular interactive interpreter ought to automatically pick a pager. If 
it doesn't, that's a bug.


(b) At the shell prompt (most likely a $ or # prompt) run:

pydoc whatever.DataFrame

if necessarily piping it to the pager or file of your choice using your 
shell's normal redirection syntax, e.g.:

pydoc whatever.DataFrame | less


(Remember, this is at the shell $ prompt, not the Python >>> prompt.)


(c) If your OS can't find "pydoc", try this instead:

python -m pydoc whatever.DataFrame





-- 
Steve

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Re: How can I get/save Pandas DataFrame help content?

[Robert]

On Wednesday, December 16, 2015 at 9:56:23 PM UTC-5, Chris Angelico wrote:
> On Thu, Dec 17, 2015 at 1:48 PM, Robert  wrote:
> > Hi,
> >
> > When I use Enthought/Canopy, help(DataFrame) has so much content that it
> > exceeds the display buffer, i.e. its head is cut off as I go up to see it.
> > I would like to know whether there is a way similar to Linux redirection to
> > save the help DataFrame content to a file?
> 
> If you use command-line Python (by just running 'python' or 'python3'
> in your shell), you should be able to use help() with a More pager.
> 
> ChrisA

Thanks for this useful idea.
I have tried with: 

help(DataFrame) | more
NameError Traceback (most recent call last)
 in ()
> 1 help(DataFrame) | more

NameError: name 'more' is not defined 

It is possible I misunderstand your method. Could you give me a little more
description on it?

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Re: How can I get/save Pandas DataFrame help content?

[Chris Angelico]

On Thu, Dec 17, 2015 at 2:20 PM, Robert  wrote:
> On Wednesday, December 16, 2015 at 9:56:23 PM UTC-5, Chris Angelico wrote:
>> On Thu, Dec 17, 2015 at 1:48 PM, Robert  wrote:
>> > Hi,
>> >
>> > When I use Enthought/Canopy, help(DataFrame) has so much content that it
>> > exceeds the display buffer, i.e. its head is cut off as I go up to see it.
>> > I would like to know whether there is a way similar to Linux redirection to
>> > save the help DataFrame content to a file?
>>
>> If you use command-line Python (by just running 'python' or 'python3'
>> in your shell), you should be able to use help() with a More pager.
>>
>> ChrisA
>
> Thanks for this useful idea.
> I have tried with:
>
> help(DataFrame) | more
> NameError Traceback (most recent call last)
>  in ()
> > 1 help(DataFrame) | more
>
> NameError: name 'more' is not defined
> 
> It is possible I misunderstand your method. Could you give me a little more
> description on it?

Sorry for the confusion. You don't need to explicitly request the
pager; the default interpreter configuration should include that.

ChrisA
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How can I get/save Pandas DataFrame help content?

[Robert]

Hi,

When I use Enthought/Canopy, help(DataFrame) has so much content that it 
exceeds the display buffer, i.e. its head is cut off as I go up to see it.
I would like to know whether there is a way similar to Linux redirection to
save the help DataFrame content to a file?

I have search on-line Pandas DataFrame web page. Surprisingly, it has much
less content than help(DataFrame) command.

If there is no way to save the content to a file, do you know where I can get
the full help DataFrame content on a web page?


Thanks,
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