自动换行

Matplotlib 可以自动换行，但如果太长，文本将显示在轴边界之外。

注意：自动换行不能与 . 'tight' 设置重新调整画布以适应所有内容并在换行之前发生。这会影响 IPython 和 Jupyter 笔记本，其中在保存要嵌入的图像时默认使用内联设置。savefig(..., bbox_inches='tight')%matplotlib inlinebbox_inches='tight'

import matplotlib.pyplot as plt

fig = plt.figure()
plt.axis([0, 10, 0, 10])
t = ("This is a really long string that I'd rather have wrapped so that it "
     "doesn't go outside of the figure, but if it's long enough it will go "
     "off the top or bottom!")
plt.text(4, 1, t, ha='left', rotation=15, wrap=True)
plt.text(6, 5, t, ha='left', rotation=15, wrap=True)
plt.text(5, 5, t, ha='right', rotation=-15, wrap=True)
plt.text(5, 10, t, fontsize=18, style='oblique', ha='center',
         va='top', wrap=True)
plt.text(3, 4, t, family='serif', style='italic', ha='right', wrap=True)
plt.text(-1, 0, t, ha='left', rotation=-15, wrap=True)

plt.show()