Fix async transactions code example in docs

Author: ivandasch

docs/async_examples.rst

@@ -90,35 +90,35 @@ Let's create transactional cache:
 .. literalinclude:: ../examples/transactions.py
   :language: python
   :dedent: 8
-  :lines: 29-32
+  :lines: 30-33
 
 Let's start a transaction and commit it:
 
 .. literalinclude:: ../examples/transactions.py
   :language: python
   :dedent: 8
-  :lines: 35-40
+  :lines: 36-41
 
 Let's check that the transaction was committed successfully:
 
 .. literalinclude:: ../examples/transactions.py
   :language: python
   :dedent: 8
-  :lines: 42-44
+  :lines: 44-45
 
 Let's check that raising exception inside `async with` block leads to transaction's rollback
 
 .. literalinclude:: ../examples/transactions.py
   :language: python
   :dedent: 8
-  :lines: 47-58
+  :lines: 48-59
 
 Let's check that timed out transaction is successfully rolled back
 
 .. literalinclude:: ../examples/transactions.py
   :language: python
   :dedent: 8
-  :lines: 61-72
+  :lines: 62-73
 
 See more info about transaction's parameters in a documentation of :py:meth:`~pyignite.aio_client.AioClient.tx_start`
 

examples/transactions.py

@@ -69,7 +69,7 @@ async def async_example():
             print(e)
 
         # key=1 value=success
-        val = await cache.get(1)
+        val = await cache.get(key)
         print(f"key=1 value={val}")
 
         # destroy cache