Sympy Latex rendering behavior and fallback logic

[cr941131]

Issue Report Checklist

• Searched the issues page for similar reports
• Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
• Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
• Could not reproduce inside jupyter qtconsole (if console-related)
• Tried basic troubleshooting (if a bug/error)
  • Restarted Spyder
  • Reset preferences with spyder --reset
  • Reinstalled the latest version of Anaconda
  • Tried the other applicable steps from the Troubleshooting Guide
• Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

When I try to use Spyder to render LaTeX, in the IPython console, it's not rendered in a nice font, but rather in a bold typeface. However, on the contrary, when I use Jupyter Notebook, which is also installed via Anaconda, it renders normally

What steps reproduce the problem?

What is the expected output? What do you see instead?

Paste Traceback/Error Below (if applicable)

Versions

Package                       Version
----------------------------- ---------------
aiobotocore                   2.5.0
aiofiles                      22.1.0
aiohttp                       3.8.5
aioitertools                  0.7.1
aiosignal                     1.2.0
aiosqlite                     0.18.0
alabaster                     0.7.12
anaconda-anon-usage           0.4.2
anaconda-catalogs             0.2.0
anaconda-client               1.12.1
anaconda-cloud-auth           0.1.3
anaconda-navigator            2.5.1
anaconda-project              0.11.1
anyio                         3.5.0
appdirs                       1.4.4
argon2-cffi                   21.3.0
argon2-cffi-bindings          21.2.0
arrow                         1.2.3
astroid                       2.14.2
astropy                       5.1
asttokens                     2.0.5
async-timeout                 4.0.2
atomicwrites                  1.4.0
attrs                         22.1.0
Automat                       20.2.0
autopep8                      1.6.0
Babel                         2.11.0
backcall                      0.2.0
backports.functools-lru-cache 1.6.4
backports.tempfile            1.0
backports.weakref             1.0.post1
bcrypt                        3.2.0
beautifulsoup4                4.12.2
binaryornot                   0.4.4
black                         0.0
bleach                        4.1.0
bokeh                         3.2.1
boltons                       23.0.0
botocore                      1.29.76
Bottleneck                    1.3.5
brotlipy                      0.7.0
certifi                       2023.11.17
cffi                          1.15.1
chardet                       4.0.0
charset-normalizer            2.0.4
click                         8.0.4
cloudpickle                   2.2.1
clyent                        1.2.2
colorama                      0.4.6
colorcet                      3.0.1
comm                          0.1.2
conda                         23.7.4
conda-build                   3.26.1
conda-content-trust           0.2.0
conda_index                   0.3.0
conda-libmamba-solver         23.7.0
conda-pack                    0.6.0
conda-package-handling        2.2.0
conda_package_streaming       0.9.0
conda-repo-cli                1.0.75
conda-token                   0.4.0
conda-verify                  3.4.2
constantly                    15.1.0
contourpy                     1.0.5
cookiecutter                  1.7.3
cryptography                  41.0.3
cssselect                     1.1.0
cycler                        0.11.0
cytoolz                       0.12.0
daal4py                       2023.1.1
dask                          2023.6.0
datasets                      2.12.0
datashader                    0.15.2
datashape                     0.5.4
debugpy                       1.6.7
decorator                     5.1.1
defusedxml                    0.7.1
diff-match-patch              20200713
dill                          0.3.6
distributed                   2023.6.0
docstring-to-markdown         0.11
docutils                      0.18.1
entrypoints                   0.4
et-xmlfile                    1.1.0
executing                     0.8.3
fastjsonschema                2.16.2
filelock                      3.9.0
flake8                        6.0.0
Flask                         2.2.2
fonttools                     4.25.0
frozenlist                    1.3.3
fsspec                        2023.4.0
future                        0.18.3
gensim                        4.3.0
glob2                         0.7
greenlet                      2.0.1
h5py                          3.9.0
HeapDict                      1.0.1
holoviews                     1.17.1
huggingface-hub               0.15.1
hvplot                        0.8.4
hyperlink                     21.0.0
idna                          3.4
imagecodecs                   2023.1.23
imageio                       2.26.0
imagesize                     1.4.1
imbalanced-learn              0.10.1
importlib-metadata            6.0.0
incremental                   21.3.0
inflection                    0.5.1
iniconfig                     1.1.1
intake                        0.6.8
intervaltree                  3.1.0
ipykernel                     6.25.0
ipython                       8.15.0
ipython-genutils              0.2.0
ipywidgets                    8.0.4
isort                         5.9.3
itemadapter                   0.3.0
itemloaders                   1.0.4
itsdangerous                  2.0.1
jaraco.classes                3.2.1
jedi                          0.18.1
jellyfish                     1.0.1
Jinja2                        3.1.2
jinja2-time                   0.2.0
jmespath                      0.10.0
joblib                        1.2.0
json5                         0.9.6
jsonpatch                     1.32
jsonpointer                   2.1
jsonschema                    4.17.3
jupyter                       1.0.0
jupyter_client                7.4.9
jupyter-console               6.6.3
jupyter_core                  5.3.0
jupyter-events                0.6.3
jupyter-server                1.23.4
jupyter_server_fileid         0.9.0
jupyter_server_ydoc           0.8.0
jupyter-ydoc                  0.2.4
jupyterlab                    3.6.3
jupyterlab-pygments           0.1.2
jupyterlab_server             2.22.0
jupyterlab-widgets            3.0.5
kaleido                       0.2.1
keyring                       23.13.1
kiwisolver                    1.4.4
lazy_loader                   0.2
lazy-object-proxy             1.6.0
libarchive-c                  2.9
libmambapy                    1.5.1
linkify-it-py                 2.0.0
llvmlite                      0.40.0
lmdb                          1.4.1
locket                        1.0.0
lxml                          4.9.3
lz4                           4.3.2
Markdown                      3.4.1
markdown-it-py                2.2.0
MarkupSafe                    2.1.1
matplotlib                    3.7.2
matplotlib-inline             0.1.6
mccabe                        0.7.0
mdit-py-plugins               0.3.0
mdurl                         0.1.0
menuinst                      1.4.19
mistune                       0.8.4
mkl-fft                       1.3.8
mkl-random                    1.2.4
mkl-service                   2.4.0
more-itertools                8.12.0
mpmath                        1.3.0
msgpack                       1.0.3
multidict                     6.0.2
multipledispatch              0.6.0
multiprocess                  0.70.14
munkres                       1.1.4
mypy-extensions               1.0.0
navigator-updater             0.4.0
nbclassic                     0.5.5
nbclient                      0.5.13
nbconvert                     6.5.4
nbformat                      5.9.2
nest-asyncio                  1.5.6
networkx                      3.1
nltk                          3.8.1
notebook                      6.5.4
notebook_shim                 0.2.2
numba                         0.57.1
numexpr                       2.8.4
numpy                         1.24.3
numpydoc                      1.5.0
openpyxl                      3.0.10
packaging                     23.1
pandas                        2.0.3
pandocfilters                 1.5.0
panel                         1.2.3
param                         1.13.0
paramiko                      2.8.1
parsel                        1.6.0
parso                         0.8.3
partd                         1.4.0
pathlib                       1.0.1
pathspec                      0.10.3
patsy                         0.5.3
pep8                          1.7.1
pexpect                       4.8.0
pickleshare                   0.7.5
Pillow                        10.0.1
pip                           23.2.1
pkce                          1.0.3
pkginfo                       1.9.6
platformdirs                  3.10.0
plotly                        5.9.0
pluggy                        1.0.0
ply                           3.11
poyo                          0.5.0
prometheus-client             0.14.1
prompt-toolkit                3.0.36
Protego                       0.1.16
psutil                        5.9.0
ptyprocess                    0.7.0
pure-eval                     0.2.2
py-cpuinfo                    8.0.0
pyarrow                       11.0.0
pyasn1                        0.4.8
pyasn1-modules                0.2.8
pycodestyle                   2.10.0
pycosat                       0.6.4
pycparser                     2.21
pyct                          0.5.0
pycurl                        7.45.2
pydantic                      1.10.8
PyDispatcher                  2.0.5
pydocstyle                    6.3.0
pyerfa                        2.0.0
pyflakes                      3.0.1
Pygments                      2.15.1
PyJWT                         2.4.0
pylint                        2.16.2
pylint-venv                   2.3.0
pyls-spyder                   0.4.0
PyNaCl                        1.5.0
pyodbc                        4.0.34
pyOpenSSL                     23.2.0
pyparsing                     3.0.9
PyQt5                         5.15.7
PyQt5-sip                     12.11.0
PyQtWebEngine                 5.15.4
pyrsistent                    0.18.0
PySocks                       1.7.1
pytest                        7.4.0
python-dateutil               2.8.2
python-dotenv                 0.21.0
python-json-logger            2.0.7
python-lsp-black              1.2.1
python-lsp-jsonrpc            1.0.0
python-lsp-server             1.7.2
python-slugify                5.0.2
python-snappy                 0.6.1
pytoolconfig                  1.2.5
pytz                          2023.3.post1
pyviz-comms                   2.3.0
PyWavelets                    1.4.1
pywin32                       305.1
pywin32-ctypes                0.2.0
pywinpty                      2.0.10
PyYAML                        6.0
pyzmq                         23.2.0
QDarkStyle                    3.0.2
qstylizer                     0.2.2
QtAwesome                     1.2.2
qtconsole                     5.4.2
QtPy                          2.2.0
queuelib                      1.5.0
regex                         2022.7.9
requests                      2.31.0
requests-file                 1.5.1
requests-toolbelt             1.0.0
responses                     0.13.3
rfc3339-validator             0.1.4
rfc3986-validator             0.1.1
rope                          1.7.0
Rtree                         1.0.1
ruamel.yaml                   0.17.21
ruamel-yaml-conda             0.17.21
s3fs                          2023.4.0
safetensors                   0.3.2
scikit-image                  0.20.0
scikit-learn                  1.3.0
scikit-learn-intelex          20230426.121932
scipy                         1.11.1
Scrapy                        2.8.0
seaborn                       0.12.2
Send2Trash                    1.8.0
service-identity              18.1.0
setuptools                    68.0.0
sip                           6.6.2
six                           1.16.0
smart-open                    5.2.1
sniffio                       1.2.0
snowballstemmer               2.2.0
sortedcontainers              2.4.0
soupsieve                     2.4
Sphinx                        5.0.2
sphinxcontrib-applehelp       1.0.2
sphinxcontrib-devhelp         1.0.2
sphinxcontrib-htmlhelp        2.0.0
sphinxcontrib-jsmath          1.0.1
sphinxcontrib-qthelp          1.0.3
sphinxcontrib-serializinghtml 1.1.5
spyder                        5.4.3
spyder-kernels                2.4.4
SQLAlchemy                    1.4.39
stack-data                    0.2.0
statsmodels                   0.14.0
sympy                         1.11.1
tables                        3.8.0
tabulate                      0.8.10
TBB                           0.2
tblib                         1.7.0
tenacity                      8.2.2
terminado                     0.17.1
text-unidecode                1.3
textdistance                  4.2.1
threadpoolctl                 2.2.0
three-merge                   0.1.1
tifffile                      2023.4.12
tinycss2                      1.2.1
tldextract                    3.2.0
tokenizers                    0.13.2
toml                          0.10.2
tomlkit                       0.11.1
toolz                         0.12.0
tornado                       6.3.2
tqdm                          4.65.0
traitlets                     5.7.1
transformers                  4.32.1
Twisted                       22.10.0
twisted-iocpsupport           1.0.2
typing_extensions             4.7.1
tzdata                        2023.3
uc-micro-py                   1.0.1
ujson                         5.4.0
Unidecode                     1.2.0
urllib3                       1.26.16
w3lib                         1.21.0
watchdog                      2.1.6
wcwidth                       0.2.5
webencodings                  0.5.1
websocket-client              0.58.0
Werkzeug                      2.2.3
whatthepatch                  1.0.2
wheel                         0.38.4
widgetsnbextension            4.0.5
win-inet-pton                 1.1.0
wrapt                         1.14.1
xarray                        2023.6.0
xlwings                       0.29.1
xxhash                        2.0.2
xyzservices                   2022.9.0
y-py                          0.5.9
yapf                          0.31.0
yarl                          1.8.1
ypy-websocket                 0.8.2
zict                          2.2.0
zipp                          3.11.0
zope.interface                5.4.0
zstandard                     0.19.0

Dependencies

PASTE DEPENDENCIES HERE

[dalthviz]

Hi @cr941131 thank you for the feedback! Do you have LaTeX installed on your machine (via TextLive, MikTex or some other distribution)? Since the IPython console inside Spyder is an "embeded" QtConsole, I think if you don't have LaTeX installed Sympy fallbacks to render things using matplotlib if available, if it's not available then fallbacks to use the Unicode pretty printer. For more info about Sympy printing you can check: https://docs.sympy.org/latest/tutorials/intro-tutorial/printing.html

Let us know if the info above helps!

[cr941131]

Thank you for your response.

I usually use Obsidian, Jupyter Notebook, and VSCode to write LaTeX, and they have worked well before, just like the image I provided earlier. Since both Jupyter Notebook and VS Code can render LaTeX properly, I haven't installed LaTeX.

However, recently, when I tried to render LaTeX with Spyder, I encountered the font issue mentioned above.

Obsidian:

Jupyter notebook:

VScode:

Spyder

OR

python code

from sympy import *
from IPython.display import display
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)   
# init_printing()

a = Integral(cos(x)*exp(x), x)
eq1 = Eq(a, a.doit())


display(a)          
display(eq1)        
print(latex(a))  

[dalthviz]

Yep, that makes sense. I would say that the rendering works over Obsidian, VSCode and Jupyter notebooks since they use web based technologies and they can use for rendering things like MathJax.

Also, just in case, I did a quick test of installing MikTex and I was able to see LaTex rendering:

So basically if you want to see LaTex rendering from the Spyder IPython console you need to install some LaTex distribution. For more info about the fallback behavior Sympy uses you can check this OS post: https://stackoverflow.com/a/43924252/15954282

I think there is not much from the Spyder side we can do but let us know if the info above helps!

[cr941131]

Thanks! It works now

[metagross4]

Hello,

I have a similiar question regarding LaTeX in Spyder.
I have done the previous step you have mentioned (downloading MiKTeX) and when I type a variable in the IPython Console (marked with orange), it does give me the variable in LaTeX font. But when I click on the "Run File" button (marked with purple) it does not show the variable in LaTeX font.

My question is: How can I make it so that when I click on the Run File button, the variable comes out in the LaTeX font?

Thank you in advance.

[ccordoba12]

@metagross4, when you run print(z), you get the string version of z instead of the Latex one. You can check it yourself by running print(z) (instead of z) directly in the IPython console.

A workaround to avoid that is to change print(z) by z in your code in the editor and then run it with the Run cell button, i.e. with this one

Then you'll get the latex version of your symbol.

[metagross4]

@ccordoba12 Thank you for replying, it worked!