matplotlib & pandas

Python/matplotlab/gallery/misc/multipage_pdf.md

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+# 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``。
+
+```python
+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()
+
+    # if LaTeX is not installed or error caught, change to `usetex=False`
+    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 ** 2, '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'] = '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()
+```
+
+## 下载这个示例
+            
+- [下载python源码: multipage_pdf.py](https://matplotlib.org/_downloads/multipage_pdf.py)
+- [下载Jupyter notebook: multipage_pdf.ipynb](https://matplotlib.org/_downloads/multipage_pdf.ipynb)