[DOC] README: Filter out update-expression refs (not supported) [IG-1…

…2272] (#291)

* [DOC] README: Filter out update-expression refs (not supported) [IG-12272]

* [PR #291] [DOC] README: Remove write expression param from example & fix DF var name [IG-12272]

README.md

@@ -72,15 +72,22 @@ client.write(backend='kv', table='mytable', dfs=df)
 
 #### backend specific parameters
 ##### KV
+<!--
 * expression=' ' (optional) - for detailed information on update expressions see [docs](https://www.iguazio.com/docs/reference/latest-release/expressions/update-expression/)
+-->
+  <!-- [IntInfo] [c-no-update-expression-support] (24.9.19) See Bug IG-12510,
+    Requirement IG-5339, & DOC IG-12272. The original write example below had
+    an `expression` parameter:
+v3c.write(backend='kv', table='mytable', dfs=df, expression='city="NY"', condition='age>14')
+    -->
 * condition=' ' (optional) - for detailed information on condition expressions see [docs](https://www.iguazio.com/docs/reference/latest-release/expressions/condition-expression/)
 
 Example:
 ```python
 data = [['tom', 10, 'TLV'], ['nick', 15, 'Berlin'], ['juli', 14, 'NY']] 
 df = pd.DataFrame(data, columns = ['name', 'age', 'city'])
 df.set_index('name')
-v3c.write(backend='kv', table='mytable', dfs=tsdf, expression='city="NY"', condition='age>14')
+v3c.write(backend='kv', table='mytable', dfs=df, condition='age>14')
 ```
 
 ### Read
@@ -179,9 +186,12 @@ Currently no `execute` commands are available for the TSDB backend.
 
 ##### KV
 * infer, inferschema - inferring and creating a schema file for a given kv table.
-Example: `client.execute(backend='kv', table='mytable', command='infer')`
+  Example: `client.execute(backend='kv', table='mytable', command='infer')`
+<!--
 * update - perform an update expression for a specific key.
 Example: `client.execute(backend='kv', table='mytable', command='update', args={'key': 'somekey', 'expression': 'col2=30', 'condition': 'col3>15'})`
+-->
+  <!-- [IntInfo] [c-no-update-expression-support] -->
 
 ##### Stream
 * put - putting a new object to a stream.