Merge pull request #2989 from enkidevs/advanced-referencing

Advanced referencing

CHANGELOG.md

@@ -479,6 +479,7 @@ Types of change:
 ### Changed
 - [Html - Link Relative Paths - Change part of PQ as it wasn't worder properly](https://github.com/enkidevs/curriculum/pull/2985)
 - [Python - Format Text Paragraphs With Textwrap - Make the fill method more clear](https://github.com/enkidevs/curriculum/pull/2981)
+- [Python - Advanced Referencing - Move single-line commands to a single line, update indentation in codeblocks from 4 to 2 spaces](https://github.com/enkidevs/curriculum/pull/2989)
 - [Python - Python Recipes - Move single-line commands to a single line, update indentation in codeblocks from 4 to 2 spaces](https://github.com/enkidevs/curriculum/pull/3009)
 - [Python - Is Your Python Healthy - Move single-line commands to a single line, update indentation in codeblocks from 4 to 2 spaces](https://github.com/enkidevs/curriculum/pull/2999)
 - [Python - Memory Allocation - Move single-line commands to a single line, update indentation in codeblocks from 4 to 2 spaces, grammar improvements](https://github.com/enkidevs/curriculum/pull/3002)

python/python-core/advanced-referencing/context-manager-types-with.md

@@ -56,13 +56,13 @@ To implement a custom **context manager**, two methods must be implemented:
 ```python
 class my_context_manager:
   def __enter__(self):
-      # set up things
-      return thing
+    # set up things
+    return thing
   def __exit__(self,type,value,traceback):
-      # deal with unmanaged resources
+    # deal with unmanaged resources
 #....
 with my_context_manager as custom_name
-   # work with resources
+  # work with resources
 
 ```
 
@@ -80,14 +80,13 @@ Complete the code snippet to implement a context manager:
 ```python
 class new_context_manager:
   def ???(self):
-      # set up things
-      return thing
-  def ???(self, type,
-         value, traceback):
-      # deal with unmanaged resources
+    # set up things
+    return thing
+  def ???(self, type, value, traceback):
+    # deal with unmanaged resources
 
 with new_context_manager as custom_name
-   # work with resources
+  # work with resources
 ```
 
 - `__enter__`

python/python-core/advanced-referencing/weakref-proxies.md

@@ -29,8 +29,8 @@ The difference is that proxies can be used without calling the `ref` first to ac
 import weakref
 
 class Enki(object):
-    def __init__(self, arg):
-        self.arg = arg
+  def __init__(self, arg):
+    self.arg = arg
 
 enki = Enki('arg')
 r = weakref.ref(enki)