Bug summary
Hi! I hit a cryptic error upon trying to render \text with double curly braces. This sometimes happens accidentally when I refactor code using f-strings (e.g., to substitute Python variable var into mathtext with subscripts I'd write f"x_\text{{sub}} = {var}"). However, when a string with such double curly braces is not an f-string ("\text{{example}}"), I get an error.
Code for reproduction
from matplotlib import pyplot as plt
fig, ax = plt.subplots()
ax.plot([1, 2], [1, 2], label="$\\text{{example}}$")
ax.legend()
fig.savefig("mre.png")Actual outcome
The code above produces
ValueError:
$\text{{example}}$
^
ParseException: Expected end of text, found '$' (at char 0), (line:1, col:1)
If I replace \text with \mathrm, everything works, just like in LaTeX.
Expected outcome
In LaTeX \text{{example}} produces {example} in text font, i.e. the inner braces are taken as part of the text. The expected behaviour would be either to do this, or at least raise an informative error.
Additional information
No response
Operating system
OS/X
Matplotlib Version
3.10.9
Matplotlib Backend
No response
Python version
Python 3.14.5
Jupyter version
No response
Installation
pip
Bug summary
Hi! I hit a cryptic error upon trying to render \text with double curly braces. This sometimes happens accidentally when I refactor code using f-strings (e.g., to substitute Python variable
varinto mathtext with subscripts I'd writef"x_\text{{sub}} = {var}"). However, when a string with such double curly braces is not an f-string ("\text{{example}}"), I get an error.Code for reproduction
Actual outcome
The code above produces
If I replace
\textwith\mathrm, everything works, just like in LaTeX.Expected outcome
In LaTeX
\text{{example}}produces{example}in text font, i.e. the inner braces are taken as part of the text. The expected behaviour would be either to do this, or at least raise an informative error.Additional information
No response
Operating system
OS/X
Matplotlib Version
3.10.9
Matplotlib Backend
No response
Python version
Python 3.14.5
Jupyter version
No response
Installation
pip