From ec9fd9eb5fd9c0f002d5c3dc16d5ed37f0684694 Mon Sep 17 00:00:00 2001
From: kznr <who.is.kazunari@gmail.com>
Date: Tue, 18 Dec 2018 17:54:53 +0900
Subject: [PATCH] Resolve issue #72

---
 README.rst             | 24 +++++++++++++++++++-----
 src/harvesters/core.py |  6 ------
 2 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/README.rst b/README.rst
index b747ca7..b7bb635 100644
--- a/README.rst
+++ b/README.rst
@@ -615,7 +615,9 @@ The following code block shows Harvester Core is running on IPython. An acquired
 
     In [14]: ia.destroy()
 
-    In [15]: quit
+    In [15]: h.reset()
+
+    In [16]: quit
     (genicam) kznr@Kazunaris-MacBook:~%
 
 ####################
@@ -747,14 +749,26 @@ And the following code disconnects the connecting device from the image acquirer
 
     ia.destroy()
 
-Now you can quit the program! Please not that the image acquirer also supports the ``with`` statement. So you may write program as follows:
+If you finished working with the ``Harvester`` object, then release the acquired resources calling the ``reset`` method:
+
+.. code-block:: python
+
+    h.reset()
+
+Now you can quit the program! Please not that ``Harvester`` and ``ImageAcquirer`` also support the ``with`` statement. So you may write program as follows:
 
 .. code-block:: python
 
-    with h.create_image_acquirer(0) as ia:
-        # Work, work, and work with the ia object.
+    with Harvester() as h:
+        with h.create_image_acquirer(0) as ia:
+            # Work, work, and work with the ia object.
+            # The ia object will automatically call the destroy method
+            # once it goes out of the block.
+
+        # The h object will automatically call the reset method
+        # once it goes out of the block.
 
-    # the ia object will automatically call the destroy method.
+This way prevents you forget to release the acquired external resources. If this notation doesn't block your use case then you should rely on the ``with`` statement.
 
 ***********************
 Reshaping a NumPy array
diff --git a/src/harvesters/core.py b/src/harvesters/core.py
index 760fd5c..b8db086 100644
--- a/src/harvesters/core.py
+++ b/src/harvesters/core.py
@@ -1385,9 +1385,6 @@ def __enter__(self):
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
-        self.__del__()
-
-    def __del__(self):
         self.destroy()
 
     @property
@@ -2196,9 +2193,6 @@ def __enter__(self):
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
-        self.__del__()
-
-    def __del__(self):
         self.reset()
 
     @property