✨ Add source examples for Python 3.10 and 3.9 with updated syntax (#842)

Co-authored-by: Esteban Maya Cadavid <emayacadavid9@gmail.com>

docs/tutorial/relationship-attributes/read-relationships.md

@@ -6,6 +6,40 @@ Now that we know how to connect data using **relationship Attributes**, let's se
 
 First, add a function `select_heroes()` where we get a hero to start working with, and add that function to the `main()` function:
 
+//// tab | Python 3.10+
+
+```Python hl_lines="3-7  14"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py310.py[ln:94-98]!}
+
+# Previous code here omitted 👈
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py310.py[ln:108-111]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="3-7  14"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py39.py[ln:96-100]!}
+
+# Previous code here omitted 👈
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py39.py[ln:110-113]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="3-7  14"
 # Code above omitted 👆
 
@@ -18,12 +52,34 @@ First, add a function `select_heroes()` where we get a hero to start working wit
 # Code below omitted 👇
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001.py!}
 ```
 
+////
+
 ///
 
 ## Select the Related Team - Old Way
@@ -32,6 +88,32 @@ Now that we have a hero, we can get the team this hero belongs to.
 
 With what we have learned **up to now**, we could use a `select()` statement, then execute it with `session.exec()`, and then get the `.first()` result, for example:
 
+//// tab | Python 3.10+
+
+```Python hl_lines="9-12"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py310.py[ln:94-103]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="9-12"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py39.py[ln:96-105]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="9-12"
 # Code above omitted 👆
 
@@ -40,12 +122,34 @@ With what we have learned **up to now**, we could use a `select()` statement, th
 # Code below omitted 👇
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001.py!}
 ```
 
+////
+
 ///
 
 ## Get Relationship Team - New Way
@@ -54,6 +158,40 @@ But now that we have the **relationship attributes**, we can just access them, a
 
 So, the highlighted block above, has the same results as the block below:
 
+//// tab | Python 3.10+
+
+```Python hl_lines="11"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py310.py[ln:94-98]!}
+
+        # Code from the previous example omitted 👈
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py310.py[ln:105]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="11"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py39.py[ln:96-100]!}
+
+        # Code from the previous example omitted 👈
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py39.py[ln:107]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="11"
 # Code above omitted 👆
 
@@ -66,12 +204,34 @@ So, the highlighted block above, has the same results as the block below:
 # Code below omitted 👇
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial001.py!}
 ```
 
+////
+
 ///
 
 /// tip
@@ -86,6 +246,32 @@ For example, here, **inside** a `with` block with a `Session` object.
 
 And the same way, when we are working on the **many** side of the **one-to-many** relationship, we can get a list of of the related objects just by accessing the relationship attribute:
 
+//// tab | Python 3.10+
+
+```Python hl_lines="9"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial002_py310.py[ln:94-100]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="9"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial002_py39.py[ln:96-102]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="9"
 # Code above omitted 👆
 
@@ -94,12 +280,34 @@ And the same way, when we are working on the **many** side of the **one-to-many*
 # Code below omitted 👇
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial002_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial002_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/relationship_attributes/read_relationships/tutorial002.py!}
 ```
 
+////
+
 ///
 
 That would print a list with all the heroes in the Preventers team: