def xkcd(scale=1, length=100, randomness=2):
    return _xkcd(scale, length, randomness)

class _xkcd:
    # This cannot be implemented in terms of rc_context() because this needs to
    # work as a non-contextmanager too.

    def __init__(self, scale, length, randomness):
        self._orig = rcParams.copy()

        if rcParams['text.usetex']:
            raise RuntimeError(
                "xkcd mode is not compatible with text.usetex = True")

        from matplotlib import patheffects
        rcParams.update({
            'font.family': ['xkcd', 'xkcd Script', 'Humor Sans', 'Comic Neue',
                            'Comic Sans MS'],
            'font.size': 14.0,
            'path.sketch': (scale, length, randomness),
            'path.effects': [
                patheffects.withStroke(linewidth=4, foreground="w")],
            'axes.linewidth': 1.5,
            'lines.linewidth': 2.0,
            'figure.facecolor': 'white',
            'grid.linewidth': 0.0,
            'axes.grid': False,
            'axes.unicode_minus': False,
            'axes.edgecolor': 'black',
            'xtick.major.size': 8,
            'xtick.major.width': 3,
            'ytick.major.size': 8,
            'ytick.major.width': 3,
        })

    def __enter__(self):
        return self

    def __exit__(self, *args):
        dict.update(rcParams, self._orig)

import matplotlib.pyplot as plt

with plt.xkcd():
    plt.bar([1,2,3],[1,2,3])
    plt.title('test')
plt.show()

import matplotlib.pyplot as plt

plt.xkcd()
plt.rcParams.update({'font.family': "FZKaTong-M19S"})
plt.bar([1,2,3],[1,2,3])
plt.title("測(cè)試")
plt.show()

findfont: Font family ['FZKaTong-M19S'] not found. Falling back to DejaVu Sans.

from matplotlib.font_manager import fontManager
print([i.name for i in fontManager.ttflist if 'FZKaTong-M19S' in i.name])

# 重建字體緩存
from matplotlib.font_manager import _rebuild

_rebuild()

import matplotlib.pyplot as plt

plt.xkcd()
plt.rcParams.update({'font.family': "FZKaTong-M19S"})
# plt.rcParams['font.family'] ='FZKaTong-M19S'
# plt.rc('font', **{'family' : 'FZKaTong-M19S'})
plt.bar([1,2,3],[1,2,3])
plt.title("測(cè)試")
plt.show()