python - matplotlib 文本框中多行文本的水平对齐

Question

我希望在右对齐的框中左对齐多行文本，或者更确切地说，其位置是根据其右边缘定义的。

也就是说，我想要文本“the other”。下面的内容要左对齐:

import matplotlib.pyplot as plt
def lowerrighttext(ax,text, size=12, alpha = 0.5, color='k', dx=1.0/20, dy=1.0/20):
    return  ax.annotate(text, xy=(1-dx, dy), xycoords = 'axes fraction', 
                        ha='right',va='bottom', color=color, 
                        size=size, bbox=dict(boxstyle="round", fc="w", 
                        ec="0.5", alpha=alpha) )

fig,ax=plt.subplots(1)
ax.plot([0,1],[0,1])
lowerrighttext(ax,'One line is longer than\nthe other.')
plt.show()

如果我指定 ha='left' 它将应用于文本框，而不仅仅是文本:

Answer 1

看来诀窍是 multialignment or ma命名参数:

import matplotlib.pyplot as plt

def lowerrighttext(ax,text, size=12, alpha = 0.5, color='k', dx=1.0/20, dy=1.0/20):
    return ax.annotate(text, xy=(1-dx, dy), xycoords = 'axes fraction',
                        ha='right',va='bottom',ma='left',color=color,           # Here
                        size=size, bbox=dict(boxstyle="round", fc="w",
                        ec="0.5", alpha=alpha))

fig,ax=plt.subplots(1)
ax.plot([0,1],[0,1])
lowerrighttext(ax,'One line is longer than\nthe other.')
plt.show()

产品:

(虽然看起来还是有点偏离，底部和右侧的距离不等，但这可能是图形宽度大于高度的效果。)