Add examples for encrypt decrypt data

doc/source/main/tools.rst

@@ -456,7 +456,7 @@ Execute `stop_clock` for stop timer.
 Get digest
 ^^^^^^^^^^
 
-.. code-block:: bash
+.. code-block:: python
 
     data = 'LibreOffice with Python'
 
@@ -472,7 +472,7 @@ Save and get configurations
 
 You can save any data.
 
-.. code-block:: bash
+.. code-block:: python
 
     my_app = 'my_extension'
     data = {
@@ -489,5 +489,47 @@ You can save any data.
     app.msgbox(data)
 
 
+Render string
+^^^^^^^^^^^^^
+
+.. code-block:: python
+
+    template = """Hello $name
+
+    I send you this $file_name
+
+    Best regards
+    """
+
+    data = {'name': 'Ingrid Bergman', 'file_name': 'letter_love.odt'}
+
+    render = app.render(template, data)
+
+    app.msgbox(render)
+
+
+Encrypt decrypt
+^^^^^^^^^^^^^^^
+
+You need install library `cryptography`_
+
+.. code-block:: python
+
+    import easymacro as app
+    from conf import PASSWORD
+
+    def encrypt_decrypt():
+
+        data = 'My super secret data'
+        token = app.encrypt(data, PASSWORD)
+        app.msgbox(token)
+
+        data = app.decrypt(token, PASSWORD)
+        app.msgbox(data)
+
+        return
+
+
 
 .. _epoch time: https://en.wikipedia.org/wiki/Unix_time
+.. _cryptography: https://github.com/pyca/cryptography