forgot to save tip

Author: bbelderbos

index.md

@@ -102,6 +102,10 @@ This file gets generated by [this script](index.py).
 
 - [The power of context managers](notes/20231212064259.md)
 
+## Dataclass
+
+- [Keyword-only arguments for dataclasses](notes/20250710131114.md)
+
 ## Dataclasses
 
 - [Dataclass field and post_init](notes/20240627192941.md)

notes/20250710131114.md

@@ -1,3 +1,28 @@
 # Keyword-only arguments for dataclasses
 
-Since 3.10
+You can force keyword-only arguments in dataclasses (Python 🐍 3.10+) 🔥
+
+Just add `kw_only=True` - a small change that makes your code more readable and safer. No more guessing what positional values mean or accidentally swapping arguments:
+
+```python
+from dataclasses import dataclass
+
+@dataclass(kw_only=True)
+class Email:
+    sender: str
+    recipient: str
+    subject: str
+    body: str
+
+# Email("alice", "bob", "Lunch?", "1pm?")  # ❌ not allowed, gives TypeError
+
+email = Email(
+    sender="alice@example.com",
+    recipient="bob@example.com",
+    subject="Lunch?",
+    body="Want to grab lunch at 1?",
+)
+# Email(sender='alice@example.com', recipient='bob@example.com', ...
+```
+
+#dataclass