Bug summary

The FontManager.addfont() method is documented as accepting a path-like, but if a path-like for a .ttf font file is passed it raises TypeError

Code for reproduction

from pathlib import Path
from matplotlib import get_data_path, __version__
from matplotlib.font_manager import fontManager

path = Path(get_data_path()) / "fonts" / "ttf" / "cmr10.ttf"

print("matplotlib", __version__)
fontManager.addfont(str(path))  # Works
print("str ok")
fontManager.addfont(path)  # TypeError
print("path ok")

Actual outcome

matplotlib 3.5.1
str ok
Traceback (most recent call last):
  File "/home/twm/dev/roofs/repro.py", line 10, in <module>
    fontManager.addfont(path)  # TypeError
  File "/home/twm/dev/roofs/venv/lib/python3.9/site-packages/matplotlib/font_manager.py", line 1092, in addfont
    font = ft2font.FT2Font(path)
TypeError: First argument must be a path or binary-mode file object

Expected outcome

matplotlib 3.5.1
str ok
path ok

Additional information

It looks like the simplest fix would be to convert path-likes to str since FT2Font is implemented in C++.

Operating system

Ubuntu 20.04

Matplotlib Version

3.5.1

Matplotlib Backend

TkAgg

Python version

3.9.5

Jupyter version

N/A

Installation

pip