python中plot函数用法字母斜体_matplotlib中斜体标题不起作用

import matplotlib.pyplot as plt

from textwrap import wrap

x_list = [11, 3, 6, 5]

label_list = ["red colour", "blue colour", "green colour", "back colour"]

title = "Some really really long long long title I really really need - and just can't - just can't - make it any - simply any - shorter - at all?"

newtitle = '\n'.join(wrap(title, width=50)) # wrap the long title so that it won't get cropped.

# here if I print `newtitle` first then "text below the main title" gets convert into italics

newtitle = "%s\n$%s$"%(newtitle, 'text\ below\ the\ main\ title')

# but If I print `newtitle` after the secondary text it doesn't convert into italics

newtitle = "%s\n$%s$"%('text\ below\ the\ main\ title', newtitle) # comment this line for 1st effect

plt.figure(figsize=(7,6), dpi=100)

plt.axis("equal")

plt.subplots_adjust(left=0.1, right=0.8, top=0.7)

plt.rc("font", size=10)

explode = [0.03, 0, 0, 0]

plt.pie(x_list, labels=label_list, explode=explode, autopct="%1.1f%%", startangle=90)

plt.title(newtitle, size=12)

plt.savefig('test.png')

所以我的主要问题是-

次要文本以普通字体排在第一位，然后主标题(newtitle)以斜体/浅色字体排在后面(看起来很漂亮)。在

newtitle = "%s\n$%s$"%('text\ below\ the\ main\ title', newtitle)

我们可以不用$符号来做吗？在