From cc3f179a5333baa6c64301739cc71e771869bcc0 Mon Sep 17 00:00:00 2001
From: Boxi Li <etamin1201@gmail.com>
Date: Sun, 9 Jan 2022 14:18:53 +0100
Subject: [PATCH] Add the example to api doc

---
 qutip/visualization.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/qutip/visualization.py b/qutip/visualization.py
index 9634876b4d..0fdb9e8e64 100644
--- a/qutip/visualization.py
+++ b/qutip/visualization.py
@@ -226,6 +226,21 @@ def hinton(rho, xlabels=None, ylabels=None, title=None, ax=None, cmap=None,
     ValueError
         Input argument is not a quantum object.
 
+    Examples
+    --------
+    >>> import qutip
+    >>>
+    >>> dm = qutip.rand_dm(4)
+    >>> fig, ax = qutip.hinton(dm)
+    >>> fig.show()
+    >>>
+    >>> qutip.settings.colorblind_safe = True
+    >>> fig, ax = qutip.hinton(dm, color_style="threshold")
+    >>> fig.show()
+    >>> qutip.settings.colorblind_safe = False
+    >>>
+    >>> fig, ax = qutip.hinton(dm, color_style="phase")
+    >>> fig.show()
     """
 
     # Apply default colormaps.