[Matplotlib-users] rectangular bracket in mathtext

[Matthias M. <Mat...@gm...>]

Hello list,

the little example below leads to an error on my system (output is attached).
I used this some time ago and it worked. Now I'm using the release 0.91.2.
Is there a reason to use rectangular brackets not in mathtext?
(same problem occur with '{' for me.)

best regards and thanks in advance for any help,
Matthias
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import matplotlib.pyplot as mpl_pp
mpl_pp.axes()
mpl_pp.xlabel("$[$")
mpl_pp.show()