pylab_examples example code: multipage_pdf.py
"""
This is a demo of creating a pdf file with several pages,
as well as adding metadata and annotations to pdf files.
"""
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.attach_note("plot of sin(x)") # you can add a pdf note to
# attach metadata to a page
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()
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原文链接：https://blog.csdn.net/cym0359/article/details/87930641
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