pyplot不导入，抛出错误

Question

  File "/home/darcey/python/opencv/matplotlib.py", line 3, in <module>
    from matplotlib import pyplot as plt
ImportError: cannot import name pyplot

That is the error I get when I run my script:

import numpy as np
import cv2
from matplotlib import pyplot as plt

img = cv2.imread('color.jpg', 0)
plt.imshow(img, cmap = 'grey', interpolation = 'bicubic')
plt.xTicks([]), plt.yTicks([])
plt.show

Answer 1

The issue here is that the file that you are running is called matplotlib.py as you can see from the first line of the traceback.

File "/home/darcey/python/opencv/matplotlib.py", line 3, in <module>
    from matplotlib import pyplot as plt
ImportError: cannot import name pyplot

This name "masks" the installed matplotlib module and therefore your code is trying to find pyplot within the current file.

The moral of the story - never name your .py files the same as any of your installed modules.