我正在尝试编写一个函数来自动在我的数字右下角放置水印。到目前为止，这是我的功能。
from PIL import Image
import matplotlib.pyplot as plt
def watermark(fig, ax):
""" Place watermark in bottom right of figure. """
# Get the pixel dimensions of the figure
width, height = fig.get_size_inches()*fig.dpi
# Import logo and scale accordingly
img = Image.open('logo.png')
wm_width = int(width/4) # make the watermark 1/4 of the figure size
scaling = (wm_width / float(img.size[0]))
wm_height = int(float(img.size[1])*float(scaling))
img = img.resize((wm_width, wm_height), Image.ANTIALIAS)
# Place the watermark in the lower right of the figure
xpos = …