isympy -i in IPython

[Christophe Bal]

Hello,

is there a way to have the features given by  isympy -i  in IPython ?

Christoohe BAL

[Mateusz Paprocki]

Hi,

On 2 October 2014 14:56, Christophe Bal <proj...@gmail.com> wrote:
> Hello,
> is there a way to have the features given by isympy -i in IPython ?

In [1]: from sympy.interactive.session import init_ipython_session

In [2]: init_ipython_session(auto_int_to_Integer=True)
Out[2]: <IPython.terminal.interactiveshell.TerminalInteractiveShell at
0x7f20752c6450>

In [3]: from sympy import *

In [4]: 1/3
Out[4]: 1/3

In [5]: type(_)
Out[5]: sympy.core.numbers.Rational

Mateusz

> Christoohe BAL
>
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[Jason Moore]

import sympy

sympy.init_session(auto_symbols=True)

Jason
moorepants.info
+01 530-601-9791

--

[Jason Moore]

Mateusz has the correct flag.

Jason
moorepants.info
+01 530-601-9791

[Christophe Bal]

Thanks for this.

C.

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[Christophe Bal]

Sorry, indeed I was looking for a solution for IPython notebook. In that case, the solution dose not work. I have the following error message.

=====================

---------------------------------------------------------------------------

MultipleInstanceError                     Traceback (most recent call last)

<ipython-input-2-b987e63c4aaa> in <module>()

----> 1 init_ipython_session(auto_int_to_Integer=True)

//anaconda/lib/python3.4/site-packages/sympy/interactive/session.py in init_ipython_session(argv, auto_symbols, auto_int_to_Integer)

    287         # don't draw IPython banner during initialization:

    288         app.display_banner = False

--> 289         app.initialize(argv)

    290 

    291         if auto_symbols:

//anaconda/lib/python3.4/site-packages/IPython/terminal/ipapp.py in initialize(self, argv)

//anaconda/lib/python3.4/site-packages/IPython/config/application.py in catch_config_error(method, app, *args, **kwargs)

     90     """

     91     try:

---> 92         return method(app, *args, **kwargs)

     93     except (TraitError, ArgumentError) as e:

     94         app.print_help()

//anaconda/lib/python3.4/site-packages/IPython/terminal/ipapp.py in initialize(self, argv)

    330         self.init_path()

    331         # create the shell

--> 332         self.init_shell()

    333         # and draw the banner

    334         self.init_banner()

//anaconda/lib/python3.4/site-packages/IPython/terminal/ipapp.py in init_shell(self)

    346         self.shell = TerminalInteractiveShell.instance(parent=self,

    347                         display_banner=False, profile_dir=self.profile_dir,

--> 348                         ipython_dir=self.ipython_dir, user_ns=self.user_ns)

    349         self.shell.configurables.append(self)

    350 

//anaconda/lib/python3.4/site-packages/IPython/config/configurable.py in instance(cls, *args, **kwargs)

    363             raise MultipleInstanceError(

    364                 'Multiple incompatible subclass instances of '

--> 365                 '%s are being created.' % cls.__name__

    366             )

    367 

MultipleInstanceError: Multiple incompatible subclass instances of TerminalInteractiveShell are being created.

[Mateusz Paprocki]

Hi,

On 2 October 2014 22:53, Christophe Bal <proj...@gmail.com> wrote:
> Sorry, indeed I was looking for a solution for IPython notebook. In that
> case, the solution dose not work. I have the following error message.

init_ipython_session() works only with terminal, but
auto_int_to_Integer is generic. Terminal-only support is rather
artificial and it should be possible to add cases for other frontends,
like notebook (thought I didn't try this).

Mateusz

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[Aaron Meurer]

Some relevant issues: https://github.com/sympy/sympy/issues/2839 and
https://github.com/sympy/sympy/issues/2921. That error message
indicates something that hasn't been updated to work with the newer
versions of IPython.

Aaron Meurer

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