matplotlib & pandas

Python/matplotlab/gallery/misc/findobj_demo.md

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+# Findobj演示
+
+递归查找符合某些条件的所有对象
+
+![Findobj演示](https://matplotlib.org/_images/sphx_glr_findobj_demo_001.png)
+
+```python
+import numpy as np
+import matplotlib.pyplot as plt
+import matplotlib.text as text
+
+a = np.arange(0, 3, .02)
+b = np.arange(0, 3, .02)
+c = np.exp(a)
+d = c[::-1]
+
+fig, ax = plt.subplots()
+plt.plot(a, c, 'k--', a, d, 'k:', a, c + d, 'k')
+plt.legend(('Model length', 'Data length', 'Total message length'),
+           loc='upper center', shadow=True)
+plt.ylim([-1, 20])
+plt.grid(False)
+plt.xlabel('Model complexity --->')
+plt.ylabel('Message length --->')
+plt.title('Minimum Message Length')
+
+
+# match on arbitrary function
+def myfunc(x):
+    return hasattr(x, 'set_color') and not hasattr(x, 'set_facecolor')
+
+
+for o in fig.findobj(myfunc):
+    o.set_color('blue')
+
+# match on class instances
+for o in fig.findobj(text.Text):
+    o.set_fontstyle('italic')
+
+
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: findobj_demo.py](https://matplotlib.org/_downloads/findobj_demo.py)
+- [下载Jupyter notebook: findobj_demo.ipynb](https://matplotlib.org/_downloads/findobj_demo.ipynb)