jimathyp · August 25, 2022 23:41 · Aug 25, 2022 · Aug 25, 2022 · Aug 24, 2022 · Aug 24, 2022
diff --git a/python-context-managers.md b/python-context-managers.md
@@ -4,21 +4,22 @@ Python context managers
 
 context managers provide - the 'with' construct
 
-```
+```python
 with blah:
   do-something()
 ```
 
 a context manager (blah) implements __enter__ and __exit__methods
-```
+```python
 from contextlib import AbstractContextManager
-
 ```
 
 
 
 https://docs.python.org/3/library/contextlib.html
+
 class contextlib.AbstractContextManager
+
 An abstract base class for classes that implement object.__enter__() and object.__exit__(). A default implementation for object.__enter__() is provided which returns self while object.__exit__() is an abstract method which by default returns None. See also the definition of Context Manager Types.
 
 New in version 3.6.

diff --git a/python-context-managers.md b/python-context-managers.md
@@ -2,7 +2,7 @@ Python context managers
 =======================
 
 
-cm - the 'with' construct
+context managers provide - the 'with' construct
 
 ```
 with blah:

diff --git a/python-context-managers.rst → python-context-managers.md b/python-context-managers.rst → python-context-managers.md
diff --git a/python-context-managers.rst b/python-context-managers.rst
@@ -10,6 +10,11 @@ with blah:
 ```
 
 a context manager (blah) implements __enter__ and __exit__methods
+```
+from contextlib import AbstractContextManager
+
+```
+
 
 
 https://docs.python.org/3/library/contextlib.html

diff --git a/python-context-managers.rst b/python-context-managers.rst
@@ -11,4 +11,20 @@ with blah:
 
 a context manager (blah) implements __enter__ and __exit__methods
 
-- https://stackoverflow.com/questions/65865543/how-can-i-tell-if-a-function-can-be-used-in-a-context-manager
+
+https://docs.python.org/3/library/contextlib.html
+class contextlib.AbstractContextManager
+An abstract base class for classes that implement object.__enter__() and object.__exit__(). A default implementation for object.__enter__() is provided which returns self while object.__exit__() is an abstract method which by default returns None. See also the definition of Context Manager Types.
+
+New in version 3.6.
+
+
+- https://stackoverflow.com/questions/65865543/how-can-i-tell-if-a-function-can-be-used-in-a-context-manager
+
+
+
+
+abstract base class
+Abstract base classes complement duck-typing by providing a way to define interfaces when other techniques like hasattr() would be clumsy or subtly wrong (for example with magic methods). ABCs introduce virtual subclasses, which are classes that don’t inherit from a class but are still recognized by isinstance() and issubclass(); see the abc module documentation. Python comes with many built-in ABCs for data structures (in the collections.abc module), numbers (in the numbers module), streams (in the io module), import finders and loaders (in the importlib.abc module). You can create your own ABCs with the abc module.
+
+
diff --git a/python-context-managers.rst b/python-context-managers.rst
@@ -0,0 +1,14 @@
+Python context managers
+=======================
+
+
+cm - the 'with' construct
+
+```
+with blah:
+  do-something()
+```
+
+a context manager (blah) implements __enter__ and __exit__methods
+
+- https://stackoverflow.com/questions/65865543/how-can-i-tell-if-a-function-can-be-used-in-a-context-manager
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