[Bug]: too much logging info after setting matplotlib.rcParams['pdf.fonttype'] = 42

[WanxiangHuang]

Bug summary

Hi, In order to solve font type3 problem, I added the following code. But it will generate too much logging info. I don't know the reaseon.

Code for reproduction

import matplotlib
matplotlib.rcParams['pdf.fonttype'] = 42
matplotlib.rcParams['ps.fonttype'] = 42
matplotlib.use("Agg")
from matplotlib import pyplot as plt

Actual outcome

INFO: 2022-11-25 22:11:48: name pruned
INFO: 2022-11-25 22:11:48: glyf pruned
INFO: 2022-11-25 22:11:48: Added gid0 to subset
INFO: 2022-11-25 22:11:48: Added first four glyphs to subset
INFO: 2022-11-25 22:11:48: Closing glyph list over 'GSUB': 60 glyphs before
INFO: 2022-11-25 22:11:48: Glyph names: ['.notdef', '.null', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'e', 'eight', 'f', 'five', 'four', 'g', 'h', 'i', 'l', 'm', 'n', 'nine', 'nonmarkingreturn', 'o', 'one', 'p', 'period', 'r', 's', 'seven', 'six', 'space', 't', 'three', 'two', 'u', 'w', 'y', 'zero']
INFO: 2022-11-25 22:11:48: Glyph IDs: [0, 1, 2, 3, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 68, 69, 70, 72, 73, 74, 75, 76, 79, 80, 81, 82, 83, 85, 86, 87, 88, 90, 92]
INFO: 2022-11-25 22:11:48: Closed glyph list over 'GSUB': 65 glyphs after
INFO: 2022-11-25 22:11:48: Glyph names: ['.notdef', '.null', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'e', 'eight', 'f', 'fi', 'five', 'fl', 'four', 'g', 'h', 'i', 'l', 'm', 'n', 'nine', 'nonmarkingreturn', 'o', 'one', 'p', 'period', 'r', 's', 'seven', 'six', 'space', 't', 'three', 'two', 'u', 'uniFB00', 'uniFB03', 'uniFB04', 'w', 'y', 'zero']
INFO: 2022-11-25 22:11:48: Glyph IDs: [0, 1, 2, 3, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 68, 69, 70, 72, 73, 74, 75, 76, 79, 80, 81, 82, 83, 85, 86, 87, 88, 90, 92, 5038, 5039, 5040, 5041, 5042]
INFO: 2022-11-25 22:11:48: Closing glyph list over 'MATH': 65 glyphs before
INFO: 2022-11-25 22:11:48: Glyph names: ['.notdef', '.null', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'e', 'eight', 'f', 'fi', 'five', 'fl', 'four', 'g', 'h', 'i', 'l', 'm', 'n', 'nine', 'nonmarkingreturn', 'o', 'one', 'p', 'period', 'r', 's', 'seven', 'six', 'space', 't', 'three', 'two', 'u', 'uniFB00', 'uniFB03', 'uniFB04', 'w', 'y', 'zero']
INFO: 2022-11-25 22:11:48: Glyph IDs: [0, 1, 2, 3, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 68, 69, 70, 72, 73, 74, 75, 76, 79, 80, 81, 82, 83, 85, 86, 87, 88, 90, 92, 5038, 5039, 5040, 5041, 5042]
INFO: 2022-11-25 22:11:48: Closed glyph list over 'MATH': 65 glyphs after

Expected outcome

clean output

Additional information

No response

Operating system

No response

Matplotlib Version

3.5.1

Matplotlib Backend

No response

Python version

No response

Jupyter version

No response

Installation

No response

[jklymak]

You must somehow have your logging level set to a non default INFO or lower. Or a package you are importing is doing it for you. We don't set the logging level so low.

If you need logging set so low for some reason you can filter our logs. See the logging module documentation for Python

[anntzer]

I agree there is nothing to be fixed on our side.

[earmingol]

I am getting the same thing, see the issue I opened here: fonttools/fonttools#3371

In this case I am not changing anything that could modify the logging level, and I noticed I start getting this issue when using

plt.rcParams.update({"pdf.fonttype": 42, "ps.fonttype": 42})

and saving any plot as pdf. However, I stop getting these logging messages when I reset the fonts with:

from matplotlib import rcParams, rcParamsDefault
rcParams.update(rcParamsDefault)

So aparently matplotlib is changing the logging level or causing it? Or maybe fonttools when matplotlib calls it (according to this section from https://matplotlib.org/stable/users/explain/text/fonts.html

[QuLogic]

Matplotlib does not change logging levels, unless you call set_loglevel.

[lldelisle]

I don't know if the fix is relevant to you: fonttools/fonttools#3371 (comment)