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LaTeX compilation error when breaking up a MathTex string by subscripts #1865

@dalejbarr

Description

@dalejbarr

Description of bug / unexpected behavior

When using MathTex() with the substrings_to_isolate argument, I get the following error:

ERROR    LaTeX compilation error:    tex_file_writing.py:199
                             Argument of \align* has an                         
                             extra }.

Expected behavior

Expected a MathTex object parsed into substrings.

How to reproduce the issue

Code for reproducing the problem
reqeq2 = MathTex(r"Y_{ij} = \mu_i + \gamma_i X_{ij} + e_{ij}", substrings_to_isolate = "i")

However,

reqeq2 = MathTex(r"Y_{ij} = \mu_i + \gamma_i X_{ij}", substrings_to_isolate = "i")

works as expected.

Additional media files

Images/GIFs

System specifications

System Details
  • OS: Linux Ubuntu 20.04
  • Python version 3.8.10
  • Installed modules (provide output from pip list):
Package                Version             
---------------------- --------------------
apturl                 0.5.2               
asn1crypto             0.24.0              
atomicwrites           1.1.5               
attrs                  19.3.0              
backcall               0.2.0               
bcrypt                 3.1.7               
beautifulsoup4         4.8.2               
binwalk                2.2.0               
blinker                1.4                 
Brlapi                 0.7.0               
certifi                2019.11.28          
chardet                3.0.4               
click                  8.0.1               
click-default-group    1.2.2               
cloup                  0.7.1               
colorama               0.4.3               
colour                 0.1.5               
command-not-found      0.3                 
commonmark             0.9.1               
cryptography           2.8                 
cupshelpers            1.0                 
cycler                 0.10.0              
dbus-python            1.2.16              
decorator              5.0.9               
defer                  1.0.6               
descartes              1.1.0               
distro                 1.4.0               
distro-info            0.23ubuntu1         
duplicity              0.8.12.0            
entrypoints            0.3                 
et-xmlfile             1.0.1               
eyeD3                  0.8.10              
fasteners              0.14.1              
future                 0.18.2              
glcontext              2.3.3               
html5lib               1.0.1               
httplib2               0.14.0              
idna                   2.8                 
importlib-metadata     1.5.0               
ipython                7.23.1              
ipython-genutils       0.2.0               
isc                    2.0                 
jdcal                  1.0                 
jedi                   0.18.0              
Jinja2                 2.10.1              
keyring                18.0.1              
keyrings.alt           3.4.0               
kiwisolver             1.0.1               
language-selector      0.1                 
launchpadlib           1.10.13             
lazr.restfulclient     0.14.2              
lazr.uri               1.0.3               
libvirt-python         6.1.0               
lockfile               0.12.2              
louis                  3.12.0              
lxml                   4.5.0               
macaroonbakery         1.3.1               
Mako                   1.1.0               
manim                  0.9.0               
ManimPango             0.3.0               
mapbox-earcut          0.12.10             
MarkupSafe             1.1.0               
matplotlib             3.1.2               
matplotlib-inline      0.1.2               
mizani                 0.7.3               
moderngl               5.6.4               
moderngl-window        2.3.0               
monotonic              1.5                 
more-itertools         4.2.0               
mpmath                 1.2.1               
multipledispatch       0.6.0               
netifaces              0.10.4              
networkx               2.5.1               
numexpr                2.7.1               
numpy                  1.20.2              
oauth                  1.0.1               
oauthlib               3.1.0               
olefile                0.46                
openpyxl               3.0.3               
packaging              20.3                
palettable             3.3.0               
pandas                 1.2.4               
paramiko               2.6.0               
parso                  0.8.2               
patsy                  0.5.1               
pexpect                4.6.0               
pickleshare            0.7.5               
Pillow                 7.0.0               
pip                    20.0.2              
plotnine               0.8.0               
pluggy                 0.13.0              
ply                    3.11                
progressbar            2.5                 
prompt-toolkit         3.0.18              
protobuf               3.6.1               
proton-client          0.5.1               
protonvpn-cli          3.7.2               
protonvpn-gui          1.1.0               
protonvpn-nm-lib       3.3.2               
psutil                 5.5.1               
py                     1.8.1               
pybind11               2.4.3               
pycairo                1.20.1              
pycrypto               2.6.1               
pycups                 1.9.73              
pydbus                 0.6.0               
pydub                  0.25.1              
pyglet                 1.5.17              
Pygments               2.9.0               
PyGObject              3.36.0              
PyICU                  2.4.2               
pyinotify              0.9.6               
PyJWT                  1.7.1               
pymacaroons            0.13.0              
PyNaCl                 1.3.0               
PyOpenGL               3.1.0               
pyOpenSSL              19.0.0              
pyparsing              2.4.6               
PyQt5                  5.14.1              
pyqtgraph              0.11.0rc0           
pyRFC3339              1.1                 
pyrr                   0.10.3              
pytest                 4.6.9               
python-apt             2.0.0+ubuntu0.20.4.5
python-dateutil        2.7.3               
python-debian          0.1.36ubuntu1       
python-gnupg           0.4.5               
python-magic           0.4.16              
pythondialog           3.4.0               
pytz                   2019.3              
pyxdg                  0.26                
PyYAML                 5.3.1               
reportlab              3.5.34              
requests               2.22.0              
requests-unixsocket    0.2.0               
rich                   10.6.0              
scipy                  1.6.2               
screeninfo             0.6.7               
SecretStorage          2.3.1               
setuptools             45.2.0              
simplejson             3.16.0              
sip                    4.19.21             
six                    1.14.0              
soupsieve              1.9.5               
ssh-import-id          5.10                
statsmodels            0.12.2              
sympy                  1.8                 
system-service         0.3                 
systemd-python         234                 
tables                 3.6.1               
tqdm                   4.60.0              
traitlets              5.0.5               
ubuntu-advantage-tools 27.2                
ubuntu-drivers-common  0.0.0               
ufw                    0.36                
unattended-upgrades    0.1                 
urllib3                1.25.8              
usb-creator            0.3.7               
validators             0.18.2              
wadllib                1.3.3               
watchdog               2.1.3               
wcwidth                0.1.8               
webencodings           0.5.1               
wheel                  0.34.2              
xkit                   0.0.0               
xlrd                   1.1.0               
xlwt                   1.3.0               
zipp                   1.0.0               
zope.interface         4.7.1    
LaTeX details
  • LaTeX distribution: TeX Live 2019/Debian
FFMPEG

Output of ffmpeg -version:

ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil      56. 31.100 / 56. 31.100
libavcodec     58. 54.100 / 58. 54.100
libavformat    58. 29.100 / 58. 29.100
libavdevice    58.  8.100 / 58.  8.100
libavfilter     7. 57.100 /  7. 57.100
libavresample   4.  0.  0 /  4.  0.  0
libswscale      5.  5.100 /  5.  5.100
libswresample   3.  5.100 /  3.  5.100
libpostproc    55.  5.100 / 55.  5.100

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