如前所述，您可以使用：

import matplotlib.pyplot as plt
plt.savefig("myfig.png")

用于保存您正在显示的任何IPhython图像。或者换个角度（从不同的角度看），如果你曾经使用过open cv，或者你已经导入了open cv的话，你可以去：

import cv2

cv2.imwrite("myfig.png",image)

但这只是为了以防万一，如果您需要使用OpenCV。否则plt.savefig（）就足够了。

如果您不喜欢“当前”数字的概念，请执行以下操作：

import matplotlib.image as mpimg

img = mpimg.imread("src.png")
mpimg.imsave("out.png", img)

import datetime
import numpy as np
from matplotlib.backends.backend_pdf import PdfPages
import matplotlib.pyplot as plt

# Create the PdfPages object to which we will save the pages:
# The with statement makes sure that the PdfPages object is closed properly at
# the end of the block, even if an Exception occurs.
with PdfPages('multipage_pdf.pdf') as pdf:
    plt.figure(figsize=(3, 3))
    plt.plot(range(7), [3, 1, 4, 1, 5, 9, 2], 'r-o')
    plt.title('Page One')
    pdf.savefig()  # saves the current figure into a pdf page
    plt.close()

    plt.rc('text', usetex=True)
    plt.figure(figsize=(8, 6))
    x = np.arange(0, 5, 0.1)
    plt.plot(x, np.sin(x), 'b-')
    plt.title('Page Two')
    pdf.savefig()
    plt.close()

    plt.rc('text', usetex=False)
    fig = plt.figure(figsize=(4, 5))
    plt.plot(x, x*x, 'ko')
    plt.title('Page Three')
    pdf.savefig(fig)  # or you can pass a Figure object to pdf.savefig
    plt.close()

    # We can also set the file's metadata via the PdfPages object:
    d = pdf.infodict()
    d['Title'] = 'Multipage PDF Example'
    d['Author'] = u'Jouni K. Sepp\xe4nen'
    d['Subject'] = 'How to create a multipage pdf file and set its metadata'
    d['Keywords'] = 'PdfPages multipage keywords author title subject'
    d['CreationDate'] = datetime.datetime(2009, 11, 13)
    d['ModDate'] = datetime.datetime.today()

除上述内容外，我还为名称添加了__file__，以便图片和Python文件获得相同的名称。我还添加了一些参数以使它看起来更好：

# Saves a PNG file of the current graph to the folder and updates it every time
# (nameOfimage, dpi=(sizeOfimage),Keeps_Labels_From_Disappearing)
plt.savefig(__file__+".png",dpi=(250), bbox_inches='tight')
# Hard coded name: './test.png'

如前所述，您可以使用：

import matplotlib.pyplot as plt
plt.savefig("myfig.png")

用于保存您正在显示的任何IPhython图像。或者换个角度（从不同的角度看），如果你曾经使用过open cv，或者你已经导入了open cv的话，你可以去：

import cv2

cv2.imwrite("myfig.png",image)

但这只是为了以防万一，如果您需要使用OpenCV。否则plt.savefig（）就足够了。

使用matplotlib.pyplot时，必须先保存绘图，然后使用以下两行关闭绘图：

fig.savefig('plot.png') # save the plot, place the path you want to save the figure in quotation
plt.close(fig) # close the figure window