多页PDF

这是一个创建包含多个页面的pdf文件，以及向pdf文件添加元数据和注释的演示。

如果要使用LaTeX使用多页pdf文件，则需要使用 matplotlib.backends.backend_pgf 导入PdfPages。 但是这个版本不支持 attach_note。

  1. import datetime
  2. import numpy as np
  3. from matplotlib.backends.backend_pdf import PdfPages
  4. import matplotlib.pyplot as plt
  6. # Create the PdfPages object to which we will save the pages:
  7. # The with statement makes sure that the PdfPages object is closed properly at
  8. # the end of the block, even if an Exception occurs.
  9. with PdfPages('multipage_pdf.pdf') as pdf:
  10.     plt.figure(figsize=(3, 3))
  11.     plt.plot(range(7), [3, 1, 4, 1, 5, 9, 2], 'r-o')
  12.     plt.title('Page One')
  13.     pdf.savefig()  # saves the current figure into a pdf page
  14.     plt.close()
  16.     # if LaTeX is not installed or error caught, change to `usetex=False`
  17.     plt.rc('text', usetex=True)
  18.     plt.figure(figsize=(8, 6))
  19.     x = np.arange(0, 5, 0.1)
  20.     plt.plot(x, np.sin(x), 'b-')
  21.     plt.title('Page Two')
  22.     pdf.attach_note("plot of sin(x)")  # you can add a pdf note to
  23.                                        # attach metadata to a page
  24.     pdf.savefig()
  25.     plt.close()
  27.     plt.rc('text', usetex=False)
  28.     fig = plt.figure(figsize=(4, 5))
  29.     plt.plot(x, x ** 2, 'ko')
  30.     plt.title('Page Three')
  31.     pdf.savefig(fig)  # or you can pass a Figure object to pdf.savefig
  32.     plt.close()
  34.     # We can also set the file's metadata via the PdfPages object:
  35.     d = pdf.infodict()
  36.     d['Title'] = 'Multipage PDF Example'
  37.     d['Author'] = 'Jouni K. Sepp\xe4nen'
  38.     d['Subject'] = 'How to create a multipage pdf file and set its metadata'
  39.     d['Keywords'] = 'PdfPages multipage keywords author title subject'
  40.     d['CreationDate'] = datetime.datetime(2009, 11, 13)
  41.     d['ModDate'] = datetime.datetime.today()

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