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Issues

Emoji Font Warnings

The emoji font raises RuntimeWarning. The font is used on the render method of the Bulldozer Environment.

The warning is raised when attempting to render the Figure. On either hard-copy (e.g. fig.savefig) or interactive mode (e.g. plt.show).

Globally suppressing Warnings could be dangerous. Thus the user would need to manually suppress the warning when visualizing the Figure object returned by env.render().

A code snippet like this will do:

def mute_warnings(callable_, *args, **kwargs):
    from warnings import catch_warnings, simplefilter

    with catch_warnings():
        simplefilter("ignore")
        callable_(*args, **kwargs)


fig = env.render()
mute_warnings(plt.show)
mute_warnings(fig.savefig, "bulldozer_render.svg")

Warning message:

./matplotlib/textpath.py:65: RuntimeWarning: Glyph 108 missing from current font.
  font.set_text(s, 0.0, flags=LOAD_NO_HINTING)

./matplotlib/textpath.py:65: RuntimeWarning: Glyph 112 missing from current font.
  font.set_text(s, 0.0, flags=LOAD_NO_HINTING)

./matplotlib/backends/backend_agg.py:241: RuntimeWarning: Glyph 108 missing from current font.
  font.set_text(s, 0.0, flags=flags)

./matplotlib/backends/backend_agg.py:241: RuntimeWarning: Glyph 112 missing from current font.
  font.set_text(s, 0.0, flags=flags)