使用 PdfPages 来解决您的问题.将您的 figure 对象传递给 savefig 方法.

Use PdfPages to solve your problem. Pass your figure object to the savefig method.

例如，如果您打开了一大堆 figure 对象，并且您想将它们保存到多页 PDF 中，您可以这样做:

For example, if you have a whole pile of figure objects open and you want to save them into a multi-page PDF, you might do:

import matplotlib.backends.backend_pdf
pdf = matplotlib.backends.backend_pdf.PdfPages("output.pdf")
for fig in xrange(1, figure().number): ## will open an empty extra figure :(
    pdf.savefig( fig )
pdf.close()