Cannot display sympy symbol in console

[david-cortes]

Steps to reproduce:

• Configure the console to use symbolic math (Tools -> Preferences -> IPython console -> Symbolic mathematics -> check 'Use symbolic math').
• Try to show some sympy symbol in the console - e.g.

  from sympy import *
  symbols("x")

Expected behavior: should display an "x" in the console, ideally with math font.

Actual behavior: spyder gets stuck there at that command, which never finishes. Sometimes, it keeps using a full CPU core's resources.

Setup: Spyder 4.0.0, installed from conda, running on Windows 10, Python 3.7.3, sympy 1.4. conda_list.txt

[goanpeca]

Can you reproduce @impact27 @jnsebgosselin ?

[jnsebgosselin]

Can you reproduce @impact27 @jnsebgosselin ?

yes

[impact27]

Not on mac:

In [1]: from sympy import *

In [2]: symbols('x')
Out[2]: 
x

In [3]: 

[david-cortes]

Also working fine on linux.

[bcolsen]

I cannot reproduce in linux with latest 4.x. The x shows up but it's black on black with the dark theme.

@david-cortes Can you try this with opening a New special console->sympy console and entering x there?

[david-cortes]

@bcolsen : Same thing, also gets stuck at the command that is supposed to show some symbol.

[skilz80]

I'm having a similar issue with Spyder trying to use Sympy to display automatic symbolic python...

I'm running this in Windows 7-64bit and I'm following their built-in tutorial: Preferences > IPython console > Advanced Settings > Use symbolic math I then make sure that box is checked... Then I restart the IPython console's kernel...

It displays:

Python 3.6.5 |Anaconda, Inc.| (default, Mar 29 2018, 13:32:41) [MSC v.1900 64 bit (AMD64)] Type "copyright", "credits" or "license" for more information.

IPython 6.4.0 -- An enhanced Interactive Python.

These commands were executed: from future import division from sympy import * x, y, z, t = symbols('x y z t') k, m, n = symbols('k m n', integer=True) f, g, h = symbols('f g h', cls=Function)

Warning: pylab (numpy and matplotlib) and symbolic math (sympy) are both enabled at the same time. Some pylab functions are going to be overrided by the sympy module (e.g. plot)

Before the In [1]: input line...

I then type in:

In [1]: expr = (x + y) ** 3

but it gives me this error message:

Traceback (most recent call last):

File "", line 1, in expr = (x + y) ** 3

NameError: name 'x' is not defined

[ccordoba12]

@skilz80, please update to our latest version (4.1.3) with these commands

conda update anaconda
conda install spyder=4.1.3

and try again.