✨ 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/many-to-many/create-models-with-link.md

@@ -12,18 +12,62 @@ As we want to support a **many-to-many** relationship, now we need a **link tabl
 
 We can create it just as any other **SQLModel**:
 
+//// tab | Python 3.10+
+
+```Python hl_lines="4-6"
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py[ln:1-6]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="6-12"
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py[ln:1-12]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="6-12"
 {!./docs_src/tutorial/many_to_many/tutorial001.py[ln:1-12]!}
 
 # Code below omitted 👇
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/many_to_many/tutorial001.py!}
 ```
 
+////
+
 ///
 
 This is a **SQLModel** class model table like any other.
@@ -38,6 +82,32 @@ And **both fields are primary keys**. We hadn't used this before. 🤓
 
 Let's see the `Team` model, it's almost identical as before, but with a little change:
 
+//// tab | Python 3.10+
+
+```Python hl_lines="8"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py[ln:9-14]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="8"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py[ln:15-20]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="8"
 # Code above omitted 👆
 
@@ -46,12 +116,34 @@ Let's see the `Team` model, it's almost identical as before, but with a little c
 # Code below omitted 👇
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/many_to_many/tutorial001.py!}
 ```
 
+////
+
 ///
 
 The **relationship attribute `heroes`** is still a list of heroes, annotated as `List["Hero"]`. Again, we use `"Hero"` in quotes because we haven't declared that class yet by this point in the code (but as you know, editors and **SQLModel** understand that).
@@ -66,6 +158,32 @@ And here's the important part to allow the **many-to-many** relationship, we use
 
 Let's see the other side, here's the `Hero` model:
 
+//// tab | Python 3.10+
+
+```Python hl_lines="9"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py[ln:17-23]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="9"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py[ln:23-29]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="9"
 # Code above omitted 👆
 
@@ -74,12 +192,34 @@ Let's see the other side, here's the `Hero` model:
 # Code below omitted 👇
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/many_to_many/tutorial001.py!}
 ```
 
+////
+
 ///
 
 We **removed** the previous `team_id` field (column) because now the relationship is done via the link table. 🔥
@@ -98,6 +238,32 @@ And now we have a **`link_model=HeroTeamLink`**. ✨
 
 The same as before, we will have the rest of the code to create the **engine**, and a function to create all the tables `create_db_and_tables()`.
 
+//// tab | Python 3.10+
+
+```Python hl_lines="9"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py[ln:26-33]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="9"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py[ln:32-39]!}
+
+# Code below omitted 👇
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="9"
 # Code above omitted 👆
 
@@ -106,17 +272,67 @@ The same as before, we will have the rest of the code to create the **engine**,
 # Code below omitted 👇
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/many_to_many/tutorial001.py!}
 ```
 
+////
+
 ///
 
 
 And as in previous examples, we will add that function to a function `main()`, and we will call that `main()` function in the main block:
 
+//// tab | Python 3.10+
+
+```Python hl_lines="4"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py[ln:72-73]!}
+    # We will do more stuff here later 👈
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py[ln:77-78]!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python hl_lines="4"
+# Code above omitted 👆
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py[ln:78-79]!}
+    # We will do more stuff here later 👈
+
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py[ln:83-84]!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python hl_lines="4"
 # Code above omitted 👆
 
@@ -126,12 +342,34 @@ And as in previous examples, we will add that function to a function `main()`, a
 {!./docs_src/tutorial/many_to_many/tutorial001.py[ln:83-84]!}
 ```
 
+////
+
 /// details | 👀 Full file preview
 
+//// tab | Python 3.10+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py310.py!}
+```
+
+////
+
+//// tab | Python 3.9+
+
+```Python
+{!./docs_src/tutorial/many_to_many/tutorial001_py39.py!}
+```
+
+////
+
+//// tab | Python 3.7+
+
 ```Python
 {!./docs_src/tutorial/many_to_many/tutorial001.py!}
 ```
 
+////
+
 ///